If you are weighing ChatGPT vs Claude vs Gemini vs Grok this month, the short answer is: ChatGPT is still the broadest all-rounder, Claude is the strongest pick for long, careful writing and professional work, Gemini makes the most sense if you live in Google's apps, and Grok is the one to choose when live news and posts on X matter most. All four changed in September 2026, so most comparisons you will find are already out of date.
This guide reflects the lineups as of October 5, 2026. Prices are US list prices taken from each vendor's own pricing page, and model names come from official announcements.
What changed in September 2026
Four launches in four weeks reset the field.
- OpenAI released GPT-6 Astra on September 3, then the cheaper GPT-6 Sol and Luna on September 22, and GPT-6.1 Sol on September 29. It also confirmed it would not ship a planned GPT-6.1 Astra after the model missed its internal safety bar, as the BBC reported.
- Anthropic shipped Claude Fable 5.1 on September 1, then Claude Opus 5.5 on September 22 and Claude Sonnet 5.5 on September 28.
- xAI, now operating as SpaceXAI, launched Grok 4.7 on September 21.
- Google announced Gemini 4 Argon on September 30, but only for a small group of trusted cyber defenders so far. Our Gemini 4 Argon release date guide tracks when everyone else gets it.
ChatGPT vs Claude vs Gemini vs Grok at a glance
The table summarizes the paid entry plan and current headline model for each assistant. The same details are spelled out in the sections below.
| Assistant | Maker | Headline model now | Paid entry plan (US) | Best at |
|---|---|---|---|---|
| ChatGPT | OpenAI | GPT-6 Astra, GPT-6.1 Sol | Go $8, Plus $20 per month | Breadth, voice, images, agentic "Work" mode |
| Claude | Anthropic | Opus 5.5, Fable 5.1 | Pro $20 per month ($17 billed annually) | Writing, long documents, careful reasoning |
| Gemini | Gemini 3.1 Pro (Argon coming) | AI Plus $4.99, AI Pro $19.99 per month | Google apps, multimodal input, storage bundle | |
| Grok | SpaceXAI (xAI) | Grok 4.7 | SuperGrok (see grok.com/plans) | Live web and X search, current events |
In plain terms: the main paid plans for ChatGPT, Claude and Gemini all cost about twenty dollars a month, while Gemini and ChatGPT also sell cheaper starter tiers at about five and eight dollars.
ChatGPT: the all-rounder
ChatGPT now has two modes. Chat is the familiar conversation window. Work, launched in July, is an agent that can stay with a task for hours, use your connected apps and produce finished documents, slides and spreadsheets. OpenAI's newest models arrived in Work and the Codex coding environment first: GPT-6.1 Sol, for example, is available in Work and Codex for paid plans but "not yet available in Chat", according to OpenAI's launch post.
GPT-6 Astra, OpenAI's most capable model, is included for Plus, Pro, Business and Enterprise users, and Pro, Business and Enterprise also get the higher-effort Astra Pro. Free and Go users can reach GPT-6 Luna in the desktop app. Plans run from Free and Go ($8) through Plus ($20) to three Pro tiers at $100, $200 and $500 a month, per OpenAI's release notes. OpenAI shows ads on the Free and Go tiers in the US; Plus and above are ad-free.
Pros
- Widest feature set: voice, image generation, file analysis, Work agent, Codex.
- Astra is at or near the top of most vendor-published comparisons.
- Cheap Go tier for light users.
Cons
- Model availability differs between Chat, Work and Codex, which confuses people.
- Ads on the free and Go tiers.
- Work usage draws down a plan allowance that varies with task size.
Who it's for: anyone who wants one assistant for everything, and people who want an agent that can finish multi-step work. Our GPT-6 Astra vs Sol vs Luna guide explains which model you get where.
Claude: the careful writer and analyst
Claude has the most coherent lineup right now. Anthropic's own docs recommend Opus 5.5 as the starting point for most work and Fable 5.1 for the hardest reasoning and long-running tasks. Sonnet 5.5 is the faster, cheaper option, and all three handle up to one million tokens of context. Our Claude Fable vs Opus vs Mythos guide explains the differences.
The free plan includes Sonnet and Haiku, web search, memory and file creation. Claude Pro costs $20 a month or $17 a month billed annually and adds Opus, Claude Code and research features; Fable is available on Pro through usage credits. Max starts at $100 a month with five or twenty times Pro's usage, according to Claude's pricing page.
Pros
- Strong long-form writing and document work; Anthropic says the 5.5 models write more clearly than the previous generation.
- Opus 5.5 is much cheaper to run than Opus 5 while matching Fable on most work, per Anthropic.
- Clear model guidance and a one-million-token context window.
Cons
- No low-cost tier between Free and the $20 Pro plan.
- Fable on Pro uses credits rather than being included outright, and on Max it is capped at half of the weekly limits.
- Cyber and biology safeguards can redirect some security or lab-science requests to other models.
Who it's for: writers, analysts, lawyers, researchers and anyone who hands an assistant long documents. For a head-to-head at the very top, see GPT-6 Astra vs Claude Fable 5.1.
Gemini: best inside Google's world
Gemini is the most tightly integrated assistant: it works inside Gmail, Docs, Sheets and Search, and the paid plans bundle Google One storage. Its weakness is timing. Gemini 3.5 Pro has been "testing with partners" since July, and the new Gemini 4 Argon is not yet open to the public. That leaves Gemini 3.1 Pro as the top model most subscribers can use today.
Plans matter more than usual this month. From October 9, the Gemini app's free tier is limited to the Flash-Lite model, AI Plus ($4.99) keeps Flash-Lite and Flash, and only AI Pro ($19.99) and AI Ultra keep the Pro model, 9to5Google reports. AI Pro is also gaining Deep Think. Ultra costs $99.99 or $199.99 a month depending on usage level, per Google's subscriptions page, and Google says Argon will reach Ultra subscribers first.
Pros
- Deep Gmail, Docs, Drive and Search integration.
- AI Pro includes 5 TB of storage, which can make it the best value if you already pay for Google One.
- Argon looks highly competitive: Artificial Analysis scored it level with GPT-6 Astra on its Intelligence Index.
Cons
- The best model is not available to most people yet.
- Free users lose access to Flash and Pro on October 9.
- Frequent model renames make it hard to know what you are using.
Who it's for: Google Workspace users, students on Google's education offers, and families who want storage and AI in one bill.
Grok: live news and X
Grok stands out for real-time search across the web and X, which makes it the quickest way to see what people are saying about breaking events. It also has a multi-agent mode and image and video generation. Grok 4.7, released September 21, is xAI's most capable model for coding and knowledge work, with a 500,000-token context window on the API and pricing from $2 per million input tokens and $6 per million output tokens.
Grok is free to try, and SuperGrok adds higher limits and multi-agent reasoning. xAI's plan page loads prices dynamically, so check grok.com/plans for current consumer pricing in your country.
Pros
- Best live view of X and fast-moving news.
- Lowest per-token API price of the four flagship models.
- Multi-agent mode shows each agent's reasoning.
Cons
- Fewer productivity integrations than ChatGPT or Gemini.
- Consumer plan pricing is less transparent.
- Real-time answers inherit the noise of social media, so verify claims.
Who it's for: journalists, traders, social media managers and anyone tracking events as they unfold.
Which one should you pick?
- One subscription for everything: ChatGPT Plus.
- Writing, research and long documents: Claude Pro.
- You already use Gmail and Google Drive daily: Google AI Pro.
- Breaking news and public sentiment: Grok, free or SuperGrok.
- Windows and Office users who want something built in: Microsoft Copilot is worth a look before paying for anything.
A practical approach is to use the free tiers of two assistants for a week on your real tasks, then pay for the one you kept reaching for. If you want to understand why some features are restricted on all four, our Preparedness Framework vs Responsible Scaling Policy guide explains the labs' safety thresholds, and our ChatGPT Plus vs Claude Pro vs Google AI Pro comparison goes deeper on the $20 plans.
FAQ
Which is better, ChatGPT or Claude?
Neither wins everything. ChatGPT covers more kinds of tasks, including voice and image generation, while Claude is generally preferred for long-form writing and careful document analysis. If you mainly write or analyze, start with Claude; if you want one tool for everything, start with ChatGPT.
Is Gemini better than ChatGPT now?
Not for most people yet. Gemini 4 Argon scores level with GPT-6 Astra on Artificial Analysis's index, but it is restricted to trusted testers. Until Argon reaches subscribers, most Gemini users are on Gemini 3.1 Pro, which trails the newest OpenAI and Anthropic models.
Which AI chatbot has the best free tier in October 2026?
It depends on what you need. Claude's free plan includes Sonnet, web search and memory. ChatGPT Free includes GPT-6 Luna in the desktop app but shows ads in the US. Gemini's free tier drops to Flash-Lite on October 9, and Grok is free to try with lower limits.
Is Grok as good as ChatGPT or Claude?
Grok 4.7 is competitive on coding and knowledge work at a lower API price, and it is clearly better for live X content. For long documents and polished writing, most reviewers still prefer Claude or ChatGPT.
Do all four cost the same?
Roughly. The main paid tiers for ChatGPT, Claude and Gemini are about $20 a month, with cheaper starter plans from Google ($4.99) and OpenAI ($8). Power-user tiers range from $100 to $500 a month.