Comparison

Claude vs ChatGPT vs Gemini

Claude vs ChatGPT vs Gemini in 2026 — how Anthropic, OpenAI and Google's flagship assistants compare on models, coding, writing, pricing and privacy, and which to choose.

Updated October 2026

Quick answer: These are the three most important AI assistants in the world, and each wins a different job. Claude is the specialist’s pick for coding, writing and careful reasoning — its plans include Claude Opus 5.5, the highest scorer on the independent Artificial Analysis Intelligence Index, and it stays ad-free. ChatGPT is the most versatile all-rounder — native image and video generation, voice, the most mature agents and the broadest ecosystem, powered by GPT-6 Astra on every paid tier. Gemini is the best value and the pick for anyone in Google’s ecosystem — it is the cheapest on the API, handles the largest in-app context, generates images and video, and plugs into Gmail, Docs, Android and Search. All three cost about $20/month for an individual paid plan. Pick Claude for text, code and analysis; ChatGPT for one do-everything app; Gemini for value, long context and Google integration. Two things to know: Claude has no image or video generation, and ChatGPT shows ads on its Free and Go tiers in a growing number of markets, including the US, UK, India and much of Europe.

At a glance

Which one should you pick?

The three run three different flagship models, and none is best at everything — so the right choice depends on what you optimise for. This is the decision in one table:

The rest of this page explains the trade-offs behind that table — the models, benchmarks, pricing, coding, writing, media, ecosystem and privacy.

The models behind them

The three assistants each run a distinct flagship. Claude’s plans include Claude Opus 5.5 (released 22 September 2026), ChatGPT runs GPT-6 Astra on every paid tier (since 5 September 2026), and Gemini’s Pro model is Gemini 3.1 Pro (selectable since February 2026, with higher limits on Google AI Pro and Ultra). These are the flagships you can actually use today.

Each lab also has a model above or beside that flagship. On ChatGPT, GPT-5.6 Sol was the flagship from 9 July to 5 September 2026 and is still selectable, and Plus includes the GPT-5.6 reasoning models alongside GPT-6 Astra. Google’s Gemini 3.5 Pro was announced at Google I/O on 19 May 2026 with a 2M-token context window and a Deep Think reasoning mode, but it is still unreleased after missing several release targets, and Gemini 4 Argon, announced on 30 September 2026, is limited to vetted cyber defenders and not yet generally available. Anthropic also offers the Mythos-class Claude Fable 5.1 (released 1 September 2026) on paid Claude plans and the API; it scores 53 on the independent Artificial Analysis Intelligence Index, level with GPT-6 Astra.

Here is how the three usable flagships compare on headline benchmarks:

Read these numbers with their sourcing in mind. On the re-based v4.3 Intelligence Index, Claude Opus 5.5 scores 58, the highest recorded, with Claude Fable 5.1 and GPT-6 Astra both on 53 and Claude Opus 5 at 51. On the Coding Agent Index, GPT-6 Astra and Fable 5.1 score 62 and Opus 5 60. Google’s strongest shipped model on the index is Gemini 3.8 Flash at 41. GPT-6 Astra, Fable 5.1 and Opus 5.5 have published no SWE-bench Pro figure, so on that benchmark Opus 5 leads the models that have one. For where every model ranks across the whole field, see best AI models.

The free tiers use lighter models: Claude free runs Sonnet 5 by default, ChatGPT Free and Go run GPT-5.6 Luna with unlimited text chats and a Think button, and Gemini free runs Gemini 3.6 Flash, with lower limits on Gemini 3.1 Pro than the paid plans — all capable, but none the top reasoning model.

Pricing

For an individual, all three land near $20/month for the flagship — but the extras differ sharply.

ChatGPT has the cheapest paid entry point — an $8 Go tier below its $20 Plus plan — while Claude has no sub-$20 paid option. Gemini is the best value overall: its API is the cheapest of the three flagships ($2/$12 per million tokens, against $4/$20 for Opus 5.5 and $10/$50 for GPT-6 Astra), and Google AI Pro bundles 2TB of storage, Veo video and a 1M-token context window for $19.99. Claude Pro is a pure AI subscription that discounts to about $17/month paid annually. At the top, ChatGPT Pro is $100, $200 or $500/month (the $500 plan, added on 29 September 2026, carries 25x Plus usage), Claude Max runs $100–$200/month, and Google AI Ultra is $99.99/month (cut from $249.99, bundling 30TB, YouTube Premium and Deep Think).

The clearest divide is ads. Anthropic has committed to keeping Claude ad-free on every tier. The Gemini app is currently ad-free too, but that is a present state rather than a promise — Google has briefed advertisers on bringing ads to Gemini in 2026 (Adweek), even as it has denied firm plans (Search Engine Land). ChatGPT already shows labelled “Sponsored” results on its Free and Go tiers, in a growing number of markets, including the US, UK, India and much of Europe; its paid tiers stay ad-free. For students, Gemini has a clear edge: Google AI Pro is free for a year for university students in the US, UK, Japan, Brazil and Indonesia.

Coding

Claude is the coding pick, though ChatGPT has closed the gap. Claude’s Opus 5 scores 79.2% on the memorisation-resistant SWE-bench Pro, the highest published figure among the three (Gemini 3.1 Pro: 54.2%; GPT-6 Astra and Opus 5.5 have published none), and Claude Code is the developer favourite for code quality, debugging and refactoring. On the independent Artificial Analysis Coding Agent Index, Anthropic’s Mythos-class Fable 5.1 and GPT-6 Astra both score 62, with Opus 5 on 60.

ChatGPT is the close second and the more autonomous option. It pairs with OpenAI’s Codex agent for fast, token-efficient autonomous coding, which is why many developers run both — Claude for code quality, Codex for speed and cost. Gemini’s advantage is context and multimodality: its 1M-token in-app window (versus roughly 500K for Claude and 400K for ChatGPT) lets it hold an entire codebase in one prompt, and its native multimodality helps with design-to-code and screenshot debugging. The rough rule in 2026: choose Claude for code quality, ChatGPT and Codex for autonomous speed, and Gemini for whole-repo analysis. Full detail in best AI for coding.

Writing and reasoning

Claude leads on writing quality and the hardest reasoning. Its prose, instruction-following and long-document handling are consistently rated the field’s strongest, and reviewers describe its output as the most natural and needing the least editing. ChatGPT is the more flexible everyday writer — smooth, versatile and strong across casual, creative and multi-format work — while Gemini produces the cleanest grounded drafts for research and data-heavy documents, helped by real-time Google Search.

On aggregate intelligence, Claude leads: on the Artificial Analysis Intelligence Index (v4.3), Claude Opus 5.5 scores 58, with Claude Fable 5.1 and GPT-6 Astra both on 53, while Google’s strongest shipped model on the index, Gemini 3.8 Flash, scores 41. For polished prose and the hardest logic, Claude is the one to beat; for everyday reasoning, you will rarely notice a gap.

Multimodality and media

This is where Claude falls behind and Gemini and ChatGPT pull ahead. Claude generates neither images nor video, and it does not process video or audio input — it deliberately focuses on text, code and reasoning. If you need to create or analyse media, Claude is not the tool.

ChatGPT and Gemini are both full multimodal suites. ChatGPT generates images natively and video through Sora, and offers real-time voice through GPT-Live (its full-duplex voice model, which replaced Advanced Voice Mode in July 2026). Gemini generates images through Imagen and Nano Banana and video through Veo — widely regarded as among the best video generators available — accepts text, images, video, audio and PDFs as input in a single prompt, and offers Gemini Live voice free. For the widest native media capability, Gemini has the edge; for a tight image-plus-voice experience inside the deepest agent ecosystem, ChatGPT is excellent.

Features and ecosystem

The three occupy different positions, which the reach numbers make plain: ChatGPT is the giant, Gemini is the close second, and Claude is the smaller professional tool. ChatGPT has around 900 million weekly active users, Gemini around 900 million monthly, and Claude around 7.5 million weekly — Claude trades mass-market reach for depth in knowledge work.

ChatGPT has the broadest third-party ecosystem — over three million custom GPTs, the widest connector set, the most mature memory, an autonomous Agent Mode and Pro-exclusive proactive briefings. Gemini has the deepest first-party ecosystem — it is woven into Gmail, Docs, Sheets, Android, Chrome and Search, ships an agentic browser (Project Mariner) and bundles Google One storage, and because AI is included in Google Workspace there is no add-on to buy. Claude’s toolkit is narrower and aimed at builders — Claude Code, an in-app agent for your local files (merged into chat from Cowork on 16 September 2026), the Docs and Slides editors, Artifacts, Projects, computer use and a growing set of MCP connectors. If you want one app woven into your existing tools, Gemini or ChatGPT wins; if you want the best professional coding and automation environment, Claude does.

Privacy and data

For consumer tiers, all three providers may use your conversations to train their models by default, with an opt-out in settings — so anyone handling sensitive material should change those settings or move to a business tier. For business, enterprise, Workspace and API use, all three contractually exclude training by default and add admin controls.

Beyond the defaults, the postures differ. Claude is the safety-first option, carrying SOC 2 Type II and ISO 42001 certifications plus the firm ad-free commitment. Gemini is the most broadly credentialed for enterprise and public-sector work — Google was among the first to certify an AI product to ISO 42001, and Gemini also carries SOC 1/2/3, FedRAMP High, HIPAA and FERPA coverage. ChatGPT holds SOC 2 Type 2 and the ISO 27001 family, with Enterprise Key Management and data-residency options on Enterprise. The clearest consumer difference is ads: ChatGPT shows them on its lower tiers, while Claude and the Gemini app do not. For anything genuinely sensitive, use a business tier regardless of which you prefer.

Best for each need

• Best for coding: Claude — Opus 5 leads SWE-bench Pro among models with a published score, and Claude Code is the developer favourite.
• Best all-rounder: ChatGPT — the widest features, ecosystem and agents in one app.
• Best value: Gemini — less than half the API price, plus 2TB of storage on the $19.99 plan.
• Best for writing: Claude — the most natural prose with the least editing.
• Best for image and video: Gemini — native Veo video and Imagen images, plus multimodal input.
• Cheapest paid entry: ChatGPT — the $8 Go tier.
• Best for long context in-app: Gemini — up to 1M tokens.
• Best ad-free guarantee: Claude — a firm commitment across every tier.
• Best for students: Gemini — a free year of Google AI Pro in eligible countries.
• Smartest model overall: a tie — Claude’s Mythos-class Fable 5.1 and ChatGPT’s GPT-6 Astra both score 53 on the Artificial Analysis Intelligence Index (v4.3).

Choose Claude if…

• Your work is mostly coding, writing or careful reasoning — Opus 5 leads SWE-bench Pro among models with a published score, and Opus 5.5 has the highest score on the independent intelligence index.
• You want the best agentic coding environment (Claude Code) and an agent for your local files, built into the Claude app.
• You want a genuinely ad-free experience backed by a firm commitment.

Choose ChatGPT if…

• You want one app for everything — writing, reasoning, coding, image, Sora video, voice and agents.
• You value the broadest ecosystem — custom GPTs, connectors, the most mature memory and agents — and the newest consumer features first.
• You want the cheapest paid entry point (the $8 Go tier) and a versatile everyday all-rounder.

Choose Gemini if…

• You want the best value — half the API price, and a $19.99 plan that bundles 2TB of storage.
• You need native image and video generation (Imagen, Veo), multimodal input, or the largest in-app context (1M tokens).
• You live in Google Workspace, Android, Chrome or Search, or you are a student eligible for a free year.

Frequently asked questions

Is Claude, ChatGPT or Gemini the best?

It depends on the job. Claude is best for coding, writing and careful reasoning, running Opus 5.5 (with Fable 5.1 on paid plans); ChatGPT is the most versatile all-rounder, with native media, the widest ecosystem and the most mature agents, running GPT-6 Astra; and Gemini is the best value and the choice for Google-ecosystem users, running Gemini 3.1 Pro. For text and code, choose Claude; for one do-everything app, choose ChatGPT; for value and Google integration, choose Gemini.

Which is best for coding?

Claude, narrowly. Opus 5 scores 79.2% on the harder SWE-bench Pro benchmark, ahead of Gemini 3.1 Pro (54.2%); GPT-6 Astra has published no SWE-bench figure, and on the independent Artificial Analysis Coding Agent Index it ties Claude Fable 5.1 on 62, with Opus 5 on 60. Claude Code is the developer favourite for code quality. ChatGPT with Codex is the stronger setup for fast autonomous coding, and Gemini’s 1M-token context is best for whole-repo analysis. Many developers use Claude and ChatGPT together. See best AI for coding.

Which is cheapest — Claude, ChatGPT or Gemini?

For the flagship they are close: Claude Pro $20, ChatGPT Plus $20, Google AI Pro $19.99. ChatGPT has the cheapest paid entry with its $8 Go tier. Gemini is the best value overall — its API is the cheapest ($2/$12 per million tokens versus $4/$20 for Claude Opus 5.5 and $10/$50 for ChatGPT’s GPT-6 Astra), and it bundles 2TB of storage. Gemini is also free for a year for eligible students, which the others do not match.

Which is best for writing?

Claude, for prose quality, instruction-following and long-document work — its output is consistently rated the most natural and needs the least editing. ChatGPT is the more flexible everyday writer across casual and multi-format content, and Gemini produces the cleanest grounded drafts for research and data-heavy documents thanks to Google Search grounding.

Do Claude, ChatGPT and Gemini all generate images?

No — only ChatGPT and Gemini do. ChatGPT generates images natively and video through Sora; Gemini generates images with Imagen and Nano Banana and video with Veo. Claude generates neither images nor video and does not process video or audio input — it focuses on text, code and reasoning. If you need media generation, choose ChatGPT or Gemini.

Which has the biggest context window?

Gemini, in the app. Gemini handles up to 1M tokens in-app, versus about 500K for Claude and roughly 400K for ChatGPT. Claude reaches a full 1M via Claude Code and the API, and Google’s announced but still unreleased Gemini 3.5 Pro targets 2M tokens. For very long documents inside the consumer app, Gemini has the edge.

Is Gemini 3.5 Pro out yet?

No. Gemini 3.5 Pro was announced at Google I/O on 19 May 2026 with a 2M-token context window and Deep Think reasoning, but it is still unreleased after missing several release targets. The Gemini app’s Pro model is Gemini 3.1 Pro, the model compared here.

Which has the smartest AI model?

Claude. On the independent Artificial Analysis Intelligence Index (v4.3), Claude’s plan-included Opus 5.5 scores 58, the highest recorded. Anthropic’s Mythos-class Claude Fable 5.1 and OpenAI’s GPT-6 Astra, ChatGPT’s paid flagship, both score 53. Google’s strongest shipped model on the index, Gemini 3.8 Flash, scores 41, and neither its announced Gemini 3.5 Pro nor Gemini 4 Argon is generally available.

Which is best for students?

Gemini, on cost and integration. Google AI Pro is free for a year for university students in the US, UK, Japan, Brazil and Indonesia, and it plugs into Docs, Gmail and Drive. Claude is the stronger writing and reasoning tool and ChatGPT the more versatile all-rounder, but neither matches Gemini’s free student year. For most students, Gemini’s free access wins; for the best writing help, Claude is worth the $20.