Claude Sonnet 4 vs GPT OSS 120B
Compare Claude Sonnet 4 by Anthropic against GPT OSS 120B by OpenAI, in 12 community votes, claude sonnet 4 wins 63% of head-to-head duels, context windows of 200K vs 131K, tested across 54 shared challenges. Updated May 2026.
Which is better, Claude Sonnet 4 or GPT OSS 120B?
Claude Sonnet 4 is the better choice overall, winning 63% of 12 blind community votes on Rival. Claude Sonnet 4 costs $3/M input tokens vs $0.18/M for GPT OSS 120B. Context windows: 200K vs 131K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Sonnet 4 and GPT OSS 120B
Claude Sonnet 4 is made by anthropic while GPT OSS 120B is from openai. Claude Sonnet 4 has a 200K token context window compared to GPT OSS 120B's 131K. On pricing, Claude Sonnet 4 costs $3/M input tokens vs $0.18/M for GPT OSS 120B. In community voting, In 12 community votes, Claude Sonnet 4 wins 63% of head-to-head duels.
In 12 community votes, Claude Sonnet 4 wins 63% of head-to-head duels. Claude Sonnet 4 leads in Image Generation, while GPT OSS 120B leads in Reasoning. Based on blind community voting from the Rival open dataset of 12+ human preference judgments for this pair.
Per 1M tokens
GPT OSS 120B is cheaper on both — 17× input, 19× output
Pick Claude Sonnet 4. In 12 blind votes, Claude Sonnet 4 wins 63% of the time. That's not luck.
Pick Claude Sonnet 4 for Image Generation. Pick GPT OSS 120B for Reasoning. GPT OSS 120B is 19x cheaper per token — worth considering if cost matters.
Style Comparison
Claude Sonnet 4 uses 5.8x more sentence length
