Claude Opus 4.1 vs GPT OSS 120B
Compare Claude Opus 4.1 by Anthropic against GPT OSS 120B by OpenAI, context windows of 200K vs 131K, tested across 53 shared challenges. Updated June 2026.
Which is better, Claude Opus 4.1 or GPT OSS 120B?
Claude Opus 4.1 and GPT OSS 120B are both competitive models. Claude Opus 4.1 costs $15/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 Opus 4.1 and GPT OSS 120B
Claude Opus 4.1 is made by anthropic while GPT OSS 120B is from openai. Claude Opus 4.1 has a 200K token context window compared to GPT OSS 120B's 131K. On pricing, Claude Opus 4.1 costs $15/M input tokens vs $0.18/M for GPT OSS 120B.
Per 1M tokens
GPT OSS 120B is cheaper on both — 83× input, 94× output
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
GPT OSS 120B is 94x cheaper per token — worth considering if cost matters.
Style Comparison
Claude Opus 4.1 uses 4.6x more sentence length
