In the eight months since the first version of this comparison, an entire generation of models has changed: OpenAI released the GPT-6 lineup with Sol, Luna, and Astra models, Anthropic released Claude 5.5 in all three sizes, and Google is preparing Gemini 4 Argon, which has beaten both competitors in benchmarks. We have rewritten the comparison for October 2026. The main takeaway as a spoiler: the difference between the three leaders in the class has disappeared; what remains are differences in character, price, and convenience — and those now decide everything.
Which Models We Compare
Each company offers not one model but a lineup, and it is important to compare comparable tiers.
| Tier | OpenAI (ChatGPT) | Anthropic (Claude) | Google (Gemini) |
|---|---|---|---|
| Flagship | GPT-6.1 Sol | Claude Opus 5.5 | Gemini 3 Pro, soon Gemini 4 Argon |
| Mid-range | GPT-6 Astra | Claude Sonnet 5.5 | Gemini 3 Pro |
| Fast and cheap | GPT-6 Luna | Claude Haiku 5.5 | Gemini 3.5 Flash |
In chat, free users usually get the mid-range or fast tier with limits, while paid subscribers get the flagship. All models are available via API at per-token pricing.
Text Quality
Claude remains the gold standard for text. It follows complex instructions more accurately than anyone else, maintains style across long documents, and is less prone than others to "spreading" into generic phrases. In October, Sonnet 5.5 closed the lineup's main weakness — speed — and became 30% faster than its predecessor.
ChatGPT writes smoothly and universally but tends toward formulaic turns of phrase and excessive structure: lists, subheadings, and disclaimers where a normal paragraph is needed. The October official OpenAI prompting guide helps work around this, but by default Claude sounds more natural.
Gemini writes more dryly and formally than the others. Its strength is not style but working with facts: the model relies on Google search and hallucinates less often. For analytical briefs this is a plus; for essays and marketing copy it is a minus.
Winner: Claude. For texts with up-to-date facts — Gemini.
Programming
This is where the race is tightest. Claude Sonnet 5.5 has improved significantly in code and works best on long agentic tasks — when the model must go through dozens of steps across a codebase on its own. GPT-6.1 Sol delivers comparable quality for less money. Gemini 4 Argon, judging by early tests, is moving into first place and was designed specifically for long programming tasks, but until release that is a promise, not a fact.
The difference is more noticeable in the tools around the models. Anthropic has Claude Code with a skills system and subagents and a free training course; OpenAI has Codex CLI as part of the subscription; Google has Gemini CLI with the most generous free tier. All three integrate with editors such as Cursor.
Winner: parity between Claude and ChatGPT; Gemini CLI is the best free option.
Reasoning and Complex Tasks
All three lineups support an extended reasoning mode, where the model thinks longer before answering. On tasks involving math, logic, and multi-step planning, the flagships are on par; differences are within the margin of error from task to task. The practical difference is in controllability: with OpenAI, reasoning depth is configured explicitly; with Claude and Gemini, it is toggled by switching modes.
Winner: parity.
Context Window
Context determines how much text a model holds in a single conversation. OpenAI and Anthropic flagships work with a million tokens — that is several thick books. With Gemini, a million tokens is available even on the free tier, and Gemini 4 Argon promises a million tokens not only for input but also for output: the model will be able to produce an entire codebase or book in one pass.
Winner: Gemini, especially for free users.
Speed
The fast tiers — Gemini 3.5 Flash, Claude Haiku 5.5, and GPT-6 Luna — respond almost instantly and are suitable for bulk tasks. Among them, Haiku 5.5 stands out for price-to-quality ratio: tokens are 10 times cheaper than the senior models, and on computer-use tasks it shows 72% versus 16% for the previous version and beats GPT-6 Luna in general tests. Gemini Flash remains the fastest and cheapest in pure terms.
Among the flagships, the slowest is Gemini 4 Argon in long-output mode, which is expected given such a volume of generation.
Winner: Gemini Flash for speed, Claude Haiku 5.5 for price-to-quality.
Prices
Chat subscriptions for all three cost comparably — around $20 per month for the base plan and significantly more for maximum limits. The difference is in the API: Gemini 4 Argon is announced at $2 per million input tokens and $10 per million output tokens, which is aggressive for a flagship; GPT-6.1 Sol is positioned as cheaper than Opus 5.5 with the same capabilities; Anthropic keeps Opus in the premium segment and competes on price through Sonnet and Haiku.
For free use, Gemini leads — the most capabilities without payment. For more on free options, see the review of free ChatGPT alternatives. You can calculate the cost of a specific workload via API in the cost calculator.
Russian Language
All three understand Russian at a high level. In text generation, Claude leads: natural syntax, correct agreement, minimal calques from English. ChatGPT is slightly behind in style, Gemini in naturalness, but all three are suitable for work texts without editing by a native speaker.
Access from Russia
All three services are officially unavailable in Russia: a VPN, a foreign number for registration, and a foreign card for payment are required. The simplest workaround for accessing the models without a VPN is aggregators and API intermediaries, as well as free alternatives such as DeepSeek and Qwen, which have already caught up with the three leaders in quality. We will devote a separate guide to this topic.
Multimodality
Gemini has historically been strongest in working with images and video: you can upload an hour-long video and ask questions about its content. OpenAI has the best image generation — GPT Image 1.5 is built right into the chat, and there is a proprietary model for video. Claude does not generate images or video, but in October it received Dashboards and Motion — interactive panels and animated data visualizations right in the chat.
Winner: Gemini for media analysis, ChatGPT for generation.
Ecosystem and Integrations
ChatGPT has the broadest ecosystem: an app store, voice mode, a built-in browser, and integrations with hundreds of services. Gemini wins for Google Workspace users: mail, documents, calendar, and YouTube are connected out of the box. Claude bets on developers and agents: a protocol for connecting external tools, skills, subagents, and a guide to building agents.
Comparison Table
| Criterion | ChatGPT | Claude | Gemini |
|---|---|---|---|
| Text | ★★★★☆ | ★★★★★ | ★★★☆☆ |
| Code | ★★★★★ | ★★★★★ | ★★★★☆ |
| Reasoning | ★★★★★ | ★★★★★ | ★★★★★ |
| Context | ★★★★☆ | ★★★★☆ | ★★★★★ |
| Fast-tier speed | ★★★★☆ | ★★★★☆ | ★★★★★ |
| API price | ★★★★☆ | ★★★☆☆ | ★★★★★ |
| Free tier | ★★★☆☆ | ★★★☆☆ | ★★★★★ |
| Russian language | ★★★★☆ | ★★★★★ | ★★★★☆ |
| Media generation | ★★★★★ | ★☆☆☆☆ | ★★★★☆ |
| Media analysis | ★★★★☆ | ★★★☆☆ | ★★★★★ |
| Agent tools | ★★★★☆ | ★★★★★ | ★★★☆☆ |
Verdict by Scenario
- Text, editing, correspondence — Claude.
- Programming — Claude or ChatGPT; for free — Gemini CLI.
- Large documents and video — Gemini.
- Bulk cheap tasks via API — Claude Haiku 5.5 or Gemini 3.5 Flash.
- Image generation and everything in one window — ChatGPT.
- Free and without limits — Gemini, or alternatives outside the trio.
- Agents and automation — Claude; we covered how to build your first agent in a separate guide.
Conclusion
In 2026, choosing between ChatGPT, Claude, and Gemini is not a choice of "which is smarter" but of "which is more convenient for my tasks." The trio updates flagships within days of each other, and any benchmark advantage lasts until the next release. Only the characters are stable: Claude for text and agents, Gemini for documents and free use, ChatGPT for ecosystem and multimedia. A reasonable strategy is to keep two accounts and switch by task, and to follow the change of leaders in the news: we cover every release on the day it comes out and compile a digest once a month.