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Claude Sonnet 4.6 vs GPT-5 Nano

Head to head on 20 shared benchmarks, with price, context window, and release dates.

Benchmark scores

64

evals · sort by any column, ⤢ to expand fullscreen

Model
Claude Sonnet 4.6

Anthropic

1805elo79.932.4%79.7%11.2%42.4%78.4%80.0%76.1%63.9%77.7%86.5%86.4%67.7%45.0%46.6%44.1%77.1%42.4%78.9%87.1%--47.2%47.6%---1.3565.3%78.0%-1207elo51.0%---92.2%---------89.3--72.1%---76.3-50.6%60.6%--51.5%---62.8%
GPT-5 Nano

OpenAI

703elo288.3%42.8%4.0%32.5%52.8%62.4%43.4%55.7%46.8%68.4%40.3%53.6%12.0%30.4%29.1%67.4%6.8%25.7%-0.0%27.3%--0.250.216.7%---10.0%--78.2%1.18100.0%-47.0%1.381.38100.0%100.0%26.7%30.4%72.9%55.6%-100.0%0.0%-0.0%1.7234.8%-29.7%--20.41-6.67-82.0%82.0%40.0%43.7%
2 / 2 models
AttributeClaude Sonnet 4.6

Anthropic

GPT-5 Nano

OpenAI

DescriptionClaude Sonnet 4.6 is an AI model from Anthropic.GPT-5 nano is an AI model from OpenAI.
FamilyClaudeGPT
Params--
Open weightsclosedclosed
Licenseproprietaryproprietary
Released17 Feb 20267 Aug 2025
Context1,000,000400,000
Input $/1M$3.00$0.05
Output $/1M$15.00$0.40
Cache read $/1M$0.300$0.005
Cache write $/1M$3.750-
Speed45 tok/s0 tok/s
Latency1.12 s0.00 s
Modalitiestext, image, filetext, image, file
Providers--
PublisherAnthropicOpenAI
Reported scores

FAQ

Is Claude Sonnet 4.6 or GPT-5 Nano better?
Across the 20 benchmarks both models report on Sophon, Claude Sonnet 4.6 leads on 20 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
How do Claude Sonnet 4.6 and GPT-5 Nano compare on GPQA Diamond?
Claude Sonnet 4.6 scores 79.7% and GPT-5 Nano scores 42.8% on GPQA Diamond.
Which is cheaper, Claude Sonnet 4.6 or GPT-5 Nano?
GPT-5 Nano is cheaper at $0.40 per million output tokens against $15.00 for Claude Sonnet 4.6 - about 37.5x.
When were Claude Sonnet 4.6 and GPT-5 Nano released?
Claude Sonnet 4.6 was released 17 Feb 2026 by Anthropic. GPT-5 Nano was released 7 Aug 2025 by OpenAI.

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