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gpt-oss-120b benchmarks, ranks and price

Where Artificial Analysis, LiveBench, LMArena and Berkeley BFCL place gpt-oss-120b, what it costs through OpenRouter and Vercel AI Gateway, and the models either side of it on the consensus.

Updated Oct 1, 2026Full leaderboardSources and method

Read Oct 1, 2026

#68of 85

on the LLM leaderboard, with a consensus score of 31 across 2 leaderboards.

Source: Artificial Analysis, LiveBench, LMArena and Berkeley BFCL, combined by Rank.ai.

By leaderboard

Where each leaderboard places gpt-oss-120b

Artificial Analysis

#42of 51

Score 11.6. Best run: openai/gpt-oss-120b.

Intelligence Index: a composite of reasoning, knowledge, maths and coding evaluations.

LiveBench

Not measured by LiveBench.

Contamination-limited questions refreshed each release: reasoning, maths, coding, data analysis, language.

LMArena

#60of 79

Score 1352. Best run: gpt-oss-120b.

Blind head-to-head human votes, style controlled.

Berkeley BFCL

Not measured by Berkeley BFCL.

Function calling and tool use, single turn to multi turn and web search.

Price and context

$0.070

OpenRouter: $0.037 in, $0.17 out. Vercel AI Gateway: $0.100 in, $0.50 out Context window 131K tokens.

Nearby

The models either side of gpt-oss-120b

  1. #65Qwen3.6 27B33
  2. #66llama-3.3-70b-instruct32
  3. #67Mistral Small 432
  4. #68gpt-oss-120b31
  5. #69o3 Mini High30
  6. #70llama-4-scout-17b-16e-instruct30
  7. #71Mistral Large 3 251228

Questions about gpt-oss-120b

How good is gpt-oss-120b?
gpt-oss-120b ranks #68 of 85 models on the Rank.ai LLM leaderboard, with a consensus score of 31 out of 100 across 2 leaderboards.
Is gpt-oss-120b better than Mistral Small 4?
Not on the consensus: Mistral Small 4 scores 32 to gpt-oss-120b's 31. Compare them source by source below, since the leaderboards test different things.
Is gpt-oss-120b better than o3 Mini High?
On the consensus, yes: 31 to 30.
How much does gpt-oss-120b cost?
$0.037 per million input tokens and $0.17 per million output tokens on OpenRouter, the cheaper listing we read. Blended at three input tokens to one output, that is $0.070 per million.
Is gpt-oss-120b good for coding?
It scores 30.4 on the Artificial Analysis Coding Index, placing it #39 for coding among the models on this leaderboard.

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