Kimi vs ChatGPT vs Claude vs Gemini: Best AI Model in 2026
Compare Kimi K3, GPT-5.6 Sol, Claude Fable 5 and Gemini 3.1 Pro Preview across context window, speed, reasoning, coding, multimodal support and API pricing — with independent Artificial Analysis benchmarks and a clear category-by-category verdict.
Kimi, ChatGPT, Claude and Gemini are four of the leading AI platforms, but their model names change frequently.
For this comparison, we are testing the current flagship general-purpose model from each company: Kimi: Kimi K3 ChatGPT: GPT-5.6 Sol Claude: Claude Fable 5 Gemini: Gemini 3.1 Pro Preview GPT-5.6 Sol is available across ChatGPT, Codex and the OpenAI API.
Claude Fable 5 is Anthropic's most capable widely released model.
Kimi K3 is Moonshot AI's new flagship, while Gemini 3.1 Pro remains Google's advanced reasoning and agentic model, although it is still labelled as a preview release.
This is primarily a model and API comparison.
The consumer applications can add different tools, system instructions, usage limits and model-routing systems, so the experience inside ChatGPT, Claude, Kimi or Gemini may differ from direct API performance.
For a live, filterable ranking across 200+ models, see our AI model comparison tool .
Kimi vs ChatGPT vs Claude vs Gemini: Quick verdict Category Winner Main reason Best overall GPT-5.6 Sol Near-leading reasoning, strongest coding-agent results and lower pricing than Claude Best reasoning Claude Fable 5 Highest independent overall intelligence score Best coding GPT-5.6 Sol Leads the current Artificial Analysis Coding Agent Index Fastest output Gemini 3.1 Pro Preview Generates approximately 121 tokens per second Fastest initial response Kimi K3 Lowest measured time to first token Best multimodal input Gemini 3.1 Pro Preview Accepts text, images, video, audio and PDFs Lowest standard API price Gemini 3.1 Pro Preview Starts at $2 input and $12 output per million tokens Best value near the frontier Kimi K3 Scores close to GPT and Claude at substantially lower token prices Largest context window Draw All four models support approximately one million tokens OpenAI has since released GPT-6 Astra , its most capable model, at $10 input and $50 output per million tokens with a 1,050,000-token context window and 128,000-token maximum output.
It sits above GPT-5.6 Sol on capability and at 2.5 times the token price, so Sol remains the better value pick for most work.
See the OpenAI pricing comparison for the full breakdown.
These conclusions combine official model specifications with independent Artificial Analysis tests.
On its Intelligence Index, Claude scores 60, GPT scores 59, Kimi scores 57 and Gemini scores 46.