gpt-oss-20b
openai/gpt-oss-20b
Creator
OpenAIReleased
2025-08-05Weights
not reportedContext
131k tokens ~Price in / out per Mtok
$0.02 ~ / $0.09 ~OpenRouter routed price — not the vendor's list price, fetched 2026-10-19
State
rankedHealth summary
7 of 7 scores sit on benchmarks that still discriminate. Every number here has been measured independently. 4 sit on benchmarks with a high risk of test-set contamination.
Epoch Capability Index
137.8 (133.2–139.8)
Epoch AI's Capability Index. A composite score with no benchmark health record behind it, so it is never this site's ranking basis and is always attributed. Published by Epoch AI under CC BY 4.0. fetched 2026-10-19
Scores
| Benchmark | Config | Score | Harness | Provenance | Measured | Health |
|---|---|---|---|---|---|---|
| Knowledge | ||||||
| GPQAnearing saturation | medium | 60.8% | not reported | ind. | 2025-08-05 | superseded |
| Coding | ||||||
| Terminal-Benchactive | base | 3.4% | Mini-SWE-Agent | ind. | 2025-08-05 | contaminateddisputed |
| Terminal-Benchactive | base | 3.1% | Terminus 2 | ind. | 2025-08-05 | contaminateddisputed |