ChatGPT

AI Assistant • Research • Coding • Content Creation
September 21, 2026
8.6
The world's most used AI assistant, now spanning chat, agents, coding and Office.
Web, iOS, Android
Free Plan • Go from $8/month

✓ Reviewed by The Future Signal

ChatGPT

AI Assistant • Research • Coding • Content Creation
September 21, 2026
8.6
The world's most used AI assistant, now spanning chat, agents, coding and Office.
Web, iOS, Android
Free Plan • Go from $8/month

✓ Reviewed by The Future Signal

Quick Verdict

ChatGPT remains the default AI assistant, with over 800 million weekly users and the broadest single-subscription feature set available. GPT-6 Astra, released 3 September 2026, leads on agentic work, and the plan ladder from free through $8, $20, $100 and $200 now serves every kind of user. The drawbacks are clarity and stability: model availability varies by plan and surface, retirements arrive frequently, and Free and Go carry ads in the US.

Decision Snapshot

Decide if ChatGPT is right for your business in under 30 seconds.

Overall Rating

Worth Your Time?

Business Value

Learning Curve

Value For Money

8.6

Yes

8.8

Beginner

8.6

Performance Ratings

Ease of Use

9.2

Features

9.6

Business Value

8.8

Innovation

9.0

Decision Snapshot

Decide if ChatGPT is right for your business in under 30 seconds.

Overall Rating

8.6

Worth Your Time?

Yes

Business Value

8.8

Learning Curve

Beginner

Value for Money

8.4

Performance Ratings

Ease of Use

9.2

Features

9.6

Business Value

8.8

Innovation

9.0

Business Impact

ChatGPT’s business impact is breadth: one subscription covers drafting, analysis, research, coding, image generation and multi-step agentic tasks that would otherwise require several tools. GPT-6 Astra’s agentic gains are where time savings are largest, completing computer-use tasks in roughly half the time of its predecessor. Office integration brings that capability directly into Word, Excel and PowerPoint, reducing context switching.

For teams, Business provides a governed workspace with admin controls, SSO, connectors and training excluded by default, allowing organisations to replace ungoverned personal accounts with a sanctioned, auditable alternative.

Key Features

Explore the core capabilities that makes ChatGPT stand out.

GPT-6 Astra

OpenAI’s most capable model, released 3 September 2026, strongest on agentic work. Scores 72.6% on OSWorld 2.0 computer use in roughly 40 minutes per task, beating its predecessor in about half the time.

ChatGPT Work

An agent that plans and completes multi-step tasks rather than answering single prompts. Plus subscribers receive GPT-6 Astra here even though it does not appear in their ordinary chat.

Codex

OpenAI’s coding agent for software development work, with GPT-6 Astra available from the Plus tier upward and additional usage purchasable through credits.

Microsoft Office Integration

ChatGPT inside Word, Excel and PowerPoint through a single Microsoft add-in, for drafting, summarising, revising and formatting from a sidebar. Available on every plan including Free.

Deep Research

Multi-step research that produces sourced reports rather than single answers, useful for competitive analysis, market research and background briefings.

ChatGPT Images 2.5

Image generation released 8 September 2026, adding a Sketch feature that turns drawings into images and roughly halving generation latency compared with the previous version.

Strength & Limitations

See where ChatGPT excels and where it may not be the best fit.

Strengths

Most widely used AI assistant with the broadest single-subscription feature set.
GPT-6 Astra leads on agentic, computer-use tasks.
Most complete pricing ladder, from free through $8, $20, $100 and $200.
Business and Enterprise exclude data from training and are ad-free.

Limitations

Model availability varies by plan and surface; Plus lacks Astra in chat.
Frequent model retirements and interface changes disrupt workflows.
Ads on Free and Go tiers for US users since February 2026.
Plus and Pro are monthly-only; Business requires two seats.

Pricing

Compare plans and pricing to find the best option for your needs.

Free Plan

Available

Starting Price

From $8/month

Free Trial

Not Available

Billing

Monthly & Annual

Business Plan

Available

Enterprise Plan

Custom-priced

Best Value

ChatGPT offers a free tier running GPT-5.6 Luna, then Go at $8 monthly with roomier limits, Plus at $20 unlocking GPT-5.6 Sol in chat plus GPT-6 Astra inside ChatGPT Work and Codex, and Pro at $100 or $200 for 5x or 20x Plus usage with GPT-6 Pro in chat. Plus and Pro are monthly-only. Business Standard costs $20 per seat annually or $25 monthly, and Business Premium $100 or $125 with 5x usage and full Astra access, with a two-seat minimum. Enterprise is custom and annual. Free and Go show ads to US users; all paid tiers are ad-free. Nonprofits can receive up to 75% off Business or Enterprise.

Pricing

Compare plans and pricing to find the best option for your needs.

Free Plan

Available

Starting Price

From $8/month

Free Trial

Not Available

Billing

Monthly & Annual

Business Plan

Available

Enterprise Plan

Custom-priced

Best Value

ChatGPT offers a free tier running GPT-5.6 Luna, then Go at $8 monthly with roomier limits, Plus at $20 unlocking GPT-5.6 Sol in chat plus GPT-6 Astra inside ChatGPT Work and Codex, and Pro at $100 or $200 for 5x or 20x Plus usage with GPT-6 Pro in chat. Plus and Pro are monthly-only. Business Standard costs $20 per seat annually or $25 monthly, and Business Premium $100 or $125 with 5x usage and full Astra access, with a two-seat minimum. Enterprise is custom and annual. Free and Go show ads to US users; all paid tiers are ad-free. Nonprofits can receive up to 75% off Business or Enterprise.

Need Deeper Analysis?

Last Updated: 21 September 2026

Executive Summary

ChatGPT remains the most widely used AI assistant in the world, with over 800 million weekly users, and it is genuinely excellent. GPT-6 Astra, released on 3 September 2026, is OpenAI’s most capable model, and the plan ladder now fills gaps it used to leave — an $8 Go tier at the bottom and a $100 Pro tier in the middle. The complications are clarity and churn. Which model answers you depends on your plan and which part of ChatGPT you are in, the model picker changed three times in six weeks, and Free and Go users in the US now see ads.

Estimated reading time: 11 minutes

Key Takeaways

  • GPT-6 Astra launched on 3 September 2026. It appears as “GPT-6 Pro” in regular chat on Pro, Business and Enterprise. Plus gets Astra only inside ChatGPT Work and Codex, not in ordinary chat.
  • The consumer ladder is now Free, Go at $8, Plus at $20, and Pro at $100 or $200. Plus and Pro are monthly-only, with no annual discount.
  • Business, formerly Team, costs $20 a seat annually or $25 monthly for Standard, with a new $100 Premium seat added in August. Two-seat minimum.
  • Ads began appearing for US users on Free and Go in February 2026. Paid plans are ad-free, and ads remain US-only.
  • Model churn is real. GPT-4o, GPT-4.1, GPT-4.5, GPT-5.1 and GPT-5.2 were retired in 2026, and GPT-5.5 leaves ChatGPT on 14 October.
  • A federal judge ordered OpenAI to produce 20 million anonymised ChatGPT logs to copyright plaintiffs in January 2026 — a reminder that conversation data can become discoverable.

What Is ChatGPT?

ChatGPT is OpenAI’s AI assistant, first released on 30 November 2022 and now the most widely used chatbot in the world, with multiple reports putting weekly active users above 800 million. It is available on the web, iOS, Android, macOS and Windows, in 59 languages.

It has grown well beyond a chat window. The product now spans several distinct surfaces: ordinary Chat; ChatGPT Work, an agent that completes multi-step tasks; Codex, a coding agent; Deep Research for sourced reports; Sites, which lets Plus and Pro users publish hosted pages; Projects and custom GPTs; image generation; and integrations into Excel, PowerPoint and, since September, Microsoft Word.

2026 has been a year of rapid model turnover. GPT-5.6 Sol launched on 9 July and still powers most paid chats. GPT-6 Astra followed on 3 September — less than two months later — with OpenAI describing it as its most capable model and state of the art on computer use, browsing, software engineering and professional work. Its clearest gain is agentic: 72.6% on the OSWorld 2.0 computer-use benchmark in roughly 40 minutes per task, against 65.7% at about 75 minutes for GPT-5.6 Sol.

Image generation moved too. ChatGPT Images 2.5 arrived on 8 September with a Sketch feature that turns drawings into images and roughly halved generation latency.

Why this matters for your business: ChatGPT is no longer one product with one model. It is a family of surfaces, each potentially running a different model depending on your plan. Buying the right tier now means knowing where your team actually works — Chat, Work or Codex — not just how much it costs.

Who Is It Best For?

ChatGPT is a strong fit for:

  • Almost any knowledge worker. Breadth is the defining strength: writing, analysis, research, coding, images and agents in one subscription.
  • Budget-conscious individuals. The $8 Go tier has no direct equivalent among major competitors, and the free tier is genuinely usable.
  • Heavy users who outgrew Plus. The $100 Pro tier closed what used to be a tenfold jump from $20 to $200.
  • Small teams wanting a shared workspace. Business provides admin controls, SAML single sign-on, connectors, and no training on business data by default.
  • Microsoft Office users. ChatGPT now works inside Word, Excel and PowerPoint, on every plan including Free.

ChatGPT is probably not the right choice for:

  • Teams that need workflows to stay stable, given the pace of model retirements and interface changes.
  • Solo professionals wanting a business-grade workspace, since Business requires two seats minimum.
  • Plus subscribers expecting GPT-6 Astra in ordinary chat — it only appears in Work and Codex on that tier.
  • Organisations needing data residency or deep compliance controls, which require Enterprise rather than Business.
  • Anyone uncomfortable with an ad-supported free tier, at least in the US.

Key Features

GPT-6 Astra. OpenAI’s newest and most capable model, strongest on agentic work — computer use, browsing and multi-step professional tasks. Surfaces as “GPT-6 Pro” in chat on higher tiers.

GPT-5.6 model family. Sol for most paid chat, Luna on Free and Go, and Terra inside Codex and Work. OpenAI now presents these through thinking levels rather than a list of model names.

ChatGPT Work. An agent that plans and completes multi-step tasks rather than answering a single prompt. Plus gets GPT-6 Astra here even though it does not get it in chat.

Codex. OpenAI’s coding agent, with GPT-6 Astra available from Plus upward.

Deep Research. Multi-step research producing sourced reports rather than single answers.

Microsoft Office integration. ChatGPT inside Word, Excel and PowerPoint through one Microsoft add-in, drafting, summarising, revising and formatting from a sidebar. Available on all plans including Free.

ChatGPT Images 2.5. Released 8 September, with a Sketch-to-image feature and roughly half the previous generation latency.

Memory, Projects and custom GPTs. Persistent context across conversations, organised workspaces, and configurable assistants for repeatable tasks.

Which model actually answers you

FREE / GO ($0 / $8) ──► GPT-5.6 Luna
   │                     ⚠ ads shown in the US
   ▼
PLUS ($20) ───────────► Chat:  GPT-5.6 Sol
   │                     Work + Codex: GPT-6 Astra
   │                     ⚠ Astra NOT in ordinary chat
   ▼
PRO ($100 or $200) ───► Chat: GPT-6 Pro (Astra)
   │                     5x or 20x Plus usage
   ▼
BUSINESS / ENTERPRISE ► GPT-6 Pro (Astra)
                          Standard: limited Astra
                          Premium: full Astra, 5x usage

[Illustration placeholder: ChatGPT plan-to-model map]

Ease of Use

The core experience is the easiest in the category. Type a question, get an answer, in an interface several hundred million people already know. Onboarding friction is close to zero, and the free tier removes the cost of finding out whether it helps.

The friction arrives with the product’s expansion. There are now several surfaces — Chat, Work, Codex, Sites, Deep Research — and model availability differs between them on the same login. One pricing analysis noted that availability can differ across Chat, Work and Codex on a single account, so users should check each surface before concluding a model is missing.

Change pace adds to it. The model picker changed three times in six weeks: GPT-5.6 Sol and Luna replaced GPT-5.5 Instant on 6 August, GPT-6 Astra arrived on 3 September, and on 14 September OpenAI stopped Plus and Pro chats from automatically switching from Instant to a thinking level. Each change was reasonable; together they make ChatGPT a moving target.

Future Signal Tip: If you rely on ChatGPT for a repeatable workflow — a custom GPT, a scheduled task, a saved setting — check it against OpenAI’s retirement notices monthly. GPT-5.5 leaves ChatGPT, Work and Codex on 14 October 2026, and anything still pointing at it will need updating first.

Performance

On capability, ChatGPT is at or near the front of the field. GPT-6 Astra’s agentic results are its clearest advance: a higher computer-use score than its predecessor in roughly half the time, which matters because agentic tasks are where time is actually saved rather than where answers are merely improved.

Breadth is the other performance story. Few competitors match ChatGPT’s combination of strong writing, capable coding, native image generation, research agents and Office integration under one subscription, and that breadth is why it remains the default for so many businesses.

Two honest caveats. First, performance depends on which model you actually get, and that depends on plan and surface — a Plus user in ordinary chat is running Sol, not Astra. Second, the retirement cadence means a model you benchmarked in spring may not exist by autumn, which complicates any evaluation built on a specific model’s behaviour.

Capability How it performs Notes
General writing and analysis Excellent Broadest all-round assistant
Agentic tasks Excellent GPT-6 Astra: 72.6% OSWorld 2.0
Coding Strong Codex, Astra from Plus upward
Image generation Strong Images 2.5, Sketch feature
Office integration Strong Word, Excel, PowerPoint on all plans
Model stability Weak Frequent retirements and picker changes

The Clarity and Trust Questions

Two issues deserve more space than a features list allows.

Which model you get is genuinely confusing. OpenAI now exposes models through thinking levels rather than names, and availability varies by plan and surface. Plus subscribers get GPT-6 Astra in Work and Codex but not in ordinary chat. Business Standard seats get limited Astra access; Premium seats get full access. Free and Go get none. Plus users can buy credits for extra Work and Codex usage, but buying credits does not move an account up the Astra rollout queue. None of this is hidden — it is all in OpenAI’s help documentation — but it is not what the plan names suggest.

Ads arrived on the cheapest tiers. OpenAI began testing ads on 9 February 2026 for logged-in US users on Free and Go. They appear below answers rather than within them, and are matched to the current conversation — and, if personalised ads and memory are enabled, potentially to previous chats. OpenAI states that ads do not influence answers and that conversations are kept private from advertisers. Plus, Pro, Business, Enterprise and Education are ad-free, minors are exempt, and OpenAI confirmed in March that ads remain US-only. Privacy advocates have raised concerns because conversational AI is a more intimate context than social media.

Conversation data can become discoverable. In January 2026, US District Judge Sidney Stein affirmed an order compelling OpenAI to produce a 20-million-log sample of anonymised ChatGPT conversations to news organisations and authors in copyright litigation. For businesses, the lesson is general rather than specific to OpenAI: anything typed into a hosted AI service can in principle surface in litigation.

⚠️ The practical position. For business use, choose Business or Enterprise rather than individual plans. Both exclude your data from model training by default and are ad-free, and Enterprise adds data residency and deeper compliance controls. Do not run client work through personal Free or Go accounts.

Integrations

ChatGPT’s integration story improved substantially in 2026. The Microsoft add-in now covers Word, Excel and PowerPoint, drafting, summarising and revising directly inside documents — and it works on every plan, including Free. For workspaces, Word access becomes enabled by default from 1 October 2026, and it uses token-based pricing at API rates, drawing from the shared usage allowance for Codex and other premium features.

Plugin connections now support multiple accounts, including personal and work accounts, across web, mobile and desktop. Business includes dozens of connectors to tools such as Slack and Google Drive. On Apple silicon Macs, an Apple Messages plugin is available through Codex and ChatGPT Work.

The OpenAI API is a separate product billed per token. GPT-6 Astra costs $10 per million input tokens and $50 per million output — roughly two and a half times GPT-5.6 Sol, which is on promotional pricing of $4 and $20 through at least 21 November 2026.

Pricing & Value

ChatGPT’s ladder is now more complete than any competitor’s, with genuine options at both ends.

Plan Price What it gets
Free $0 GPT-5.6 Luna, ads in the US
Go $8/month Luna with roomier limits, ads in the US
Plus $20/month GPT-5.6 Sol in chat; Astra in Work and Codex
Pro $100 or $200/month GPT-6 Pro in chat; 5x or 20x Plus usage
Business Standard $20/seat annual, $25 monthly Admin, SSO, no training on data, limited Astra
Business Premium $100/seat annual, $125 monthly 5x usage, no five-hour limit, full Astra
Enterprise Custom, annual Data residency, deepest compliance

Plus and both Pro tiers are monthly-only, with no annual discount — if you see an annual Plus price quoted, treat it as a lapsed or regional promotion. Business is the tier with a published annual discount.

Business was renamed from Team, cut in price in April 2026 from $25 and $30, and gained a Premium seat on 10 August. Standard and Premium seats can be mixed within one workspace, but a two-seat minimum applies, so the practical entry point is about $40 a month and there is no solo Business plan.

Nonprofits can receive up to 75% off Business or Enterprise, and verified US K-12 teachers have free access through June 2027.

For context on the competitive position: independent analysis notes that ChatGPT Business and Claude Team currently list identical Standard and Premium seat prices, down to the dollar. Where ChatGPT differs is at the edges — the $8 Go tier has no direct equivalent at major competitors, and the $100 Pro tier removed what used to be a tenfold jump.

Is it good value? For individuals, Plus at $20 remains the sensible default for regular professional use. For teams, Business Standard is competitive and ad-free with training excluded. The value question is less about price than about whether your team uses the surfaces — Work, Codex — where the premium models actually appear.

Which part of ChatGPT does your team actually spend its time in? That answer decides whether Plus is enough or whether Pro or Premium seats are worth it.

Strengths

  • The most widely used AI assistant, with the broadest single-subscription feature set available.
  • GPT-6 Astra leads on agentic work, completing computer-use tasks faster and more accurately than its predecessor.
  • The most complete pricing ladder in the category, from a genuinely useful free tier through $8, $20, $100 and $200.
  • Native integration into Word, Excel and PowerPoint on every plan, including Free.
  • Business and Enterprise exclude data from training by default and are ad-free.

Limitations

  • Model availability varies by plan and surface, and Plus does not get GPT-6 Astra in ordinary chat.
  • Frequent model retirements and three picker changes in six weeks make workflows unstable.
  • Ads on Free and Go in the US, matched to conversation content.
  • Plus and Pro are monthly-only, with no annual discount.
  • Business requires a two-seat minimum, and data residency needs Enterprise.
  • Conversation logs have been ordered into discovery in copyright litigation.

Alternatives

Claude — competitive on writing and coding, with identically priced team seats. Worth comparing directly on your own tasks. (Disclosure: produced by Anthropic, which also produced the AI assistance behind this review.)

Google Gemini — the stronger choice for Google Workspace businesses, with very large context windows and deep integration into Gmail and Docs.

Microsoft 365 Copilot — the default for organisations committed to Microsoft 365, grounded in company data, though ChatGPT now also works inside Office.

Perplexity — better when the job is sourced web research rather than general assistance.

The Future Signal

ChatGPT’s 2026 story is not really about GPT-6 Astra. It is about OpenAI turning a chatbot into an operating layer — Chat, Work, Codex, Sites, Office integration, agents — and pricing each surface differently.

That strategy is coherent. The model race is increasingly close between frontier labs, and the durable advantage is distribution: 800 million weekly users and an interface people already trust. Putting ChatGPT inside Word, available even to free users, is a clear signal that OpenAI intends to compete on presence rather than model quality alone.

The tension is monetisation under pressure. Reporting puts OpenAI’s projected 2026 cash burn around $17 billion, and ads on the free tier — something the company’s CEO previously described as a last resort — arrived in February. Paid tiers remain ad-free, and OpenAI has been explicit that ads do not influence answers. But advertising changes the incentives around conversational data, and that is worth watching for any business that lets staff use free accounts.

Watch two things: whether the model picker stabilises, and whether ads expand beyond the US. The first determines whether ChatGPT is dependable infrastructure; the second determines what the free tier really costs.

Final Verdict

Overall Rating: 8.6 / 10

ChatGPT remains the default AI assistant for good reason. GPT-6 Astra is a genuine advance on agentic work, the feature set is the broadest available under one subscription, and the pricing ladder now serves everyone from free users to heavy professionals. Business tier data protections are sound.

It loses points on clarity and stability rather than capability. Model availability varies confusingly by plan and surface, retirements arrive frequently, and the free tier now carries ads in the US.

Future Signal recommends ChatGPT for almost any business wanting a capable general-purpose assistant — on Business or Enterprise for work involving client or company data. Check which surface your team uses before choosing a tier, and review model retirement notices regularly.

Before you subscribe — a short checklist

  • Work out whether your team uses Chat, Work or Codex — models differ by surface
  • Remember Plus gets GPT-6 Astra only in Work and Codex, not in chat
  • Use Business or Enterprise for any client or company data
  • Budget for the two-seat minimum if you need Business
  • Note Plus and Pro are monthly-only; Business has the annual discount
  • Update anything pointing at GPT-5.5 before 14 October 2026
  • Keep staff off personal Free and Go accounts for work tasks
  • Check nonprofit or education discounts if eligible

Frequently Asked Questions

What is the latest ChatGPT model? GPT-6 Astra, released on 3 September 2026. It appears as “GPT-6 Pro” in regular chat on Pro, Business and Enterprise. GPT-5.6 Sol, launched in July, still powers most paid chats, and GPT-5.6 Luna runs on Free and Go.

Does ChatGPT Plus get GPT-6 Astra? Only inside ChatGPT Work and Codex, not in ordinary chat. Plus subscribers looking for Astra in the chat model picker will not find it there. Pro, Business and Enterprise get it in chat.

How much does ChatGPT cost? Free, then Go at $8, Plus at $20, and Pro at $100 or $200 a month. Business costs $20 per seat annually or $25 monthly for Standard, and $100 or $125 for Premium, with a two-seat minimum. Enterprise is custom-priced.

Does ChatGPT show ads? Yes, for logged-in US users on Free and Go since February 2026. Ads appear below answers, not within them. Plus, Pro, Business, Enterprise and Education are ad-free, minors are exempt, and ads are currently US-only.

Does OpenAI train on my business data? Not by default on Business and Enterprise, which exclude your organisation’s data from model training. Individual plans follow different settings, so business work should run on a business tier.

Why does my ChatGPT keep changing? OpenAI is retiring models quickly. GPT-4o, GPT-4.1, GPT-4.5, GPT-5.1 and GPT-5.2 were all retired from ChatGPT in 2026, the model picker changed three times in six weeks, and GPT-5.5 retires on 14 October. Models generally remain for about 90 days after a successor arrives.

Can I use ChatGPT inside Microsoft Word? Yes, since September 2026, alongside Excel and PowerPoint, through one Microsoft add-in. It works on all plans including Free. For workspaces, Word access becomes enabled by default from 1 October 2026 and draws on token-based usage allowances.

Is there a Business plan for one person? No. Business requires a minimum of two seats, making the practical entry point around $40 a month. Solo professionals typically use Plus or Pro instead.

Conclusion

ChatGPT’s strength is breadth delivered at scale. No other assistant combines writing, analysis, coding, research agents, image generation and Office integration under one subscription with 800 million weekly users behind it, and GPT-6 Astra keeps it at the front on the agentic work where real time savings sit. The pricing ladder is now genuinely complete, from a free tier through an $8 option and a $100 middle step that closed an old gap.

Its weaknesses are about predictability. Which model answers you depends on your plan and on which part of ChatGPT you are using. Models retire on a cadence that can break workflows. The cheapest tiers carry ads in the US. And a court order this year was a reminder that conversations held on any hosted service can become evidence.

The practical advice is straightforward. Run business work on Business or Enterprise, where training is excluded and ads never appear. Choose your tier by the surface your team actually uses, not the plan name. And treat OpenAI’s retirement notices as part of routine maintenance. Do that and ChatGPT remains the strongest general-purpose AI assistant for most businesses.

Editor's Verdict

Our final assessment after evaluating features, performance, value, and business impact:

ChatGPT earns a strong recommendation as the default general-purpose AI assistant for most businesses. GPT-6 Astra is a genuine advance on agentic work, the feature set is the broadest available under a single subscription, and the pricing ladder is now the most complete in the category, with an $8 entry tier and a $100 middle step that closed a long-standing gap. Business and Enterprise tiers exclude data from training and carry no ads.

The reservations concern predictability rather than capability: which model answers depends on both plan and surface, with Plus receiving Astra only in Work and Codex, and frequent model retirements can disrupt established workflows. Use business tiers for company data.

Frequently Asked Questions

Get quick answers to the most common questions about ChatGPT, including pricing, features, security, and business use cases.
ChatGPT is used for writing, analysis, research, coding, image generation and multi-step agentic tasks. Businesses use it for drafting documents and communications, summarising material, market and competitive research through Deep Research, software development through Codex, and work inside Word, Excel and PowerPoint via the Microsoft add-in.
For most knowledge workers, yes — Plus at $20 remains the sensible default for regular professional use, and the free tier lets you test it first. For teams handling company data, Business Standard at $20 per seat annually is competitive, excludes data from training and carries no ads.
Yes, ChatGPT has a free tier running GPT-5.6 Luna, and it is genuinely usable. Free users can also access ChatGPT inside Word, Excel and PowerPoint. Note that US users on Free and Go see ads below answers, and Free does not include GPT-6 Astra.
Almost any knowledge worker wanting a capable general-purpose assistant, budget-conscious users via the $8 Go tier, heavy users via the $100 or $200 Pro tiers, and small teams via Business. Organisations needing data residency or deep compliance controls should look at Enterprise.
Claude is competitive on writing and coding with identically priced team seats; note it is produced by Anthropic, which also produced the AI assistance behind this review. Google Gemini suits Google Workspace businesses with its large context windows. Microsoft 365 Copilot suits organisations committed to Microsoft 365 and grounded in company data. Perplexity is stronger for sourced web research.
For business use, choose Business or Enterprise: both exclude your organisation’s data from model training by default and never show ads, with Business holding SOC 2 Type II compliance and SAML single sign-on, and Enterprise adding data residency and deeper compliance controls. Avoid running client work through personal Free or Go accounts, which show ads to US users. Be aware that in January 2026 a US federal judge ordered OpenAI to produce 20 million anonymised ChatGPT logs in copyright litigation — a reminder that data on any hosted AI service can become discoverable.

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