OpenAI
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Listed August 2025
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Open Weights
gpt-oss-120b
Arena #213 • score 1352 ±4
Open Weights model from OpenAI, listed August 2025. Arena text score 1352 (#213 of 414 entries). $0.15 input / $0.60 output per 1M tokens. 128K tokens context.
Parameters
117B total, 5.1B active (MoE)
Context Window
128K tokens
Input / 1M tokens
$0.15
Output / 1M tokens
$0.60
Benchmark Results
- Arena Text Elo: 1352 (#213 of 414 on arena.ai · ±4 · 30,218 votes · variant: gpt-oss-120b)
- SWE-bench Verified: 26.0% (mini-SWE-agent (bash only) · run 'gpt-oss-120b' · 2025-08-07)
- AA Intelligence Index: 11.6 (Artificial Analysis v4.3 · best setting: gpt-oss-120b (High) · checked 2026-10-11)
- AA Coding Index: 30.4 (Artificial Analysis v4.3 · best setting: gpt-oss-120b (High) · checked 2026-10-11)
- AA Agentic Index: 3.7 (Artificial Analysis v4.3 · best setting: gpt-oss-120b (High) · checked 2026-10-11)