OpenAI·released 2025-08-04✓ 2 sources
gpt-oss-120b benchmark scores: 15 benchmarks tracked. 20% of its scores are independently reproduced — the rest are self-reported or unverified.
Leads on 0 of 15 benchmarks·best result 88.88 on OTIS Mock AIME 2024-2025 (reproduced)·3 of 15 independently reproduced
| Benchmark | Score | Evidence status | Measured |
|---|---|---|---|
| OTIS Mock AIME 2024-2025 | 88.88accuracy (%) | reproduced· optimizedT1 | 2025-08-05Epoch AI |
| Lech Mazur Writing | 77.1accuracy (%) | unverifiedT1 | 2025-08-05lechmazur/writing Github repository |
| GPQA diamond | 67.68accuracy (%) | reproduced· optimizedT1 | 2025-08-05Epoch AI |
| DTBench | 60.45accuracy (%) | unverifiedT1 | 2025-08-05https://conceptualreasoning.ai/dtbench |
| METR Time Horizons | 56.63accuracy (%) | unverifiedT1 | 2025-08-05METR - Measuring AI Ability to Complete Long Tasks |
| WeirdML | 48.17accuracy (%) | unverifiedT1 | 2025-08-05WeirdML Leaderboard |
| Fiction.LiveBench | 44.4accuracy (%) | unverifiedT1 | 2025-08-05Fiction.live leaderboard |
| Aider polyglot | 41.8accuracy (%) | unverified· optimizedT1 | 2025-08-05Aider LLM Leaderboards |
| LMCA | 26.05accuracy (%) | unverifiedT1 | 2025-08-05https://conceptualreasoning.ai/lmca |
| Surface Evolver Bench | 25accuracy (%) | unverifiedT1 | 2025-08-05https://yhenon.github.io/surface-evolver-llm-eval/ |
| Terminal Bench | 18.7accuracy (%) | unverified· optimizedT1 | 2025-08-05Terminal-Bench v2 Leaderboard |
| Chess Puzzles | 15.82accuracy (%) | reproducedT1 | 2025-08-05Epoch AI |
| SimpleBench | 6.52accuracy (%) | unverifiedT1 | 2025-08-05SimpleBench Leaderboard |
| APEX-Agents | 4.4accuracy (%) | unverifiedT2 | 2025-08-05 |
| Mystery Game Puzzles | 0accuracy (%) | unverifiedT2 | 2025-08-05 |
Claims drawn from cited facts, not live model generation.
Developed by OpenAI and released in 2025, this model is large at 116.83 billion parameters. That scale implies more headroom for capability but also higher serving costs than compact alternatives.
4 cited facts
It is scored on 15 tracked benchmarks and holds no current top score. The record is independently reproduced, so outside evaluation backs up the reported scores.
3 cited facts
It trails the leading score by 48.74 points on average under the disclosed harness, a wide gap that reads as well behind the front of the pack. It holds the top score on 0 benchmarks, so there is no category leadership yet.
2 cited facts
6 facts cross-checked across data sources: 1 corroborated, 5 single-source.
Source facts, citations, and refresh stamp for this record.
Sources: epoch_benchmarks, huggingface_models, openrouter_models
gpt-oss-120b is an AI model developed by OpenAI, released 2025-08-04. Its benchmark record below tags every score as independently reproduced, self-reported, or unverified.
gpt-oss-120b has recorded scores on 15 benchmarks, each shown with its evidence status.
gpt-oss-120b has recorded scores on 15 benchmarks — Lech Mazur Writing, GPQA diamond, OTIS Mock AIME 2024-2025, DTBench, WeirdML, LMCA, and 9 more. The full table above shows each score with its evidence status.
3 of 15 recorded scores (20%) are independently reproduced rather than self-reported by the lab.
gpt-oss-120b has 15 tracked claims: 3 independently reproduced, 12 unverified.