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Claude 4 Sonnet vs gpt-oss-120b

Head to head on 21 shared benchmarks, with price, context window, and release dates.

Benchmark scores

50

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Model
Claude 4 Sonnet

Anthropic

38.0%54.7%1480elo58.468.3%4.3%45.4%64.8%77.5%54.6%44.3%72.9%70.5%69.0%44.9%83.7%37.3%74.6%69.6%27.3%52.3%-40.7%--22.9%47.8%-19.8%67.5%---93.4%33.9%72.4%86.7%-62.5%43.9%6.186.1835.0%-58.3%35.6%-0.5984.0%84.0%55.5%
gpt-oss-120b

OpenAI

66.7%58.2%959elo35.867.2%5.9%58.3%51.0%60.2%38.8%50.3%48.6%68.9%39.2%70.7%77.5%36.0%26.0%71.6%5.3%45.0%41.8%-38.9%7.6%--13.0%--57.61.621.53----80.0%-----97.9%--65.6%---49.6%
2 / 2 models
AttributeClaude 4 Sonnet

Anthropic

gpt-oss-120b

OpenAI

DescriptionClaude 4 Sonnet is an AI model from Anthropic.GPT-Oss 120b is an AI model from OpenAI, released with open weights.
FamilyClaudeGPT
Params--
Open weightsclosedopen
Licenseproprietaryapache-2.0
Released22 May 20255 Aug 2025
Context200,000131,072
Input $/1M$3.00$0.15
Output $/1M$15.00$0.60
Cache read $/1M-$0.030
Cache write $/1M--
Speed0 tok/s186 tok/s
Latency0.00 s0.50 s
Modalitiestext, imagetext
Providers--
PublisherAnthropicOpenAI
Reported scores
GPQA Diamond67.2% (AA)
LiveCodeBench70.7% (AA)
MMLU-Pro77.5% (AA)
SciCode36.0% (AA)

FAQ

Is Claude 4 Sonnet or gpt-oss-120b better?
Across the 21 benchmarks both models report on Sophon, Claude 4 Sonnet leads on 14 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
How do Claude 4 Sonnet and gpt-oss-120b compare on GPQA Diamond?
Claude 4 Sonnet scores 68.3% and gpt-oss-120b scores 67.2% on GPQA Diamond.
Which is cheaper, Claude 4 Sonnet or gpt-oss-120b?
gpt-oss-120b is cheaper at $0.60 per million output tokens against $15.00 for Claude 4 Sonnet - about 25.0x.
When were Claude 4 Sonnet and gpt-oss-120b released?
Claude 4 Sonnet was released 22 May 2025 by Anthropic. gpt-oss-120b was released 5 Aug 2025 by OpenAI.

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