gpt-oss-20b

Name: gpt-oss-20b
Author: OpenAI

GPT-Oss 20b is an AI model from OpenAI, released with open weights.

Publisher: OpenAI
Family: GPT
Context: 131K
Input
Output
License: apache-2.0
Released: 5 Aug 2025

Cite

Notes

Only stored in your browser.

Attribution

Benchmark scores: AA prime-hub Vals AI EQ-Bench

Attribution policy →

Context

131K

Weights

Open

downloadable

Input

$0.07

/1M tok

Output

$0.18

/1M tok

Blended

$0.10

#248/ 499/1M · 3:1

Speed

224

#16/ 498tok/s

Cache read

$0.01

0.13x input

Price & speed via Artificial Analysis · ranked across tracked models · caching via OpenRouter

Reasoning effort	Index	Price	Speed
high	9.0	$0.10	224 t/s
low	10.0	$0.11	292 t/s

Intelligence Index per reasoning-effort setting, via Artificial Analysis

Reported on 24 evals across 9 domains - best 89.3% on AIME 2025: Problems from the American Invitational Mathematics Examination · #28 of 205

Reported eval scores

LiveCodeBench77.7

AIME 2025: Problems from the American Invitational Mathematics Examination89.3

LitBench66.7

Meow0.2

Science Gym Bio44.9

Science Gym Materials42.1

IFBench65.1

Terminal-Bench (Hard)10.6

SciCode38.9

GPQA Diamond68.8

τ²-bench (Tau²-bench)60.2

MMLU-Pro74.8

Humanity's Last Exam (HLE)11

CorpFin v253.1