GPT OSS 20B
Open GPT reasoning model for self-hosted agents and controllable deployments
ECI STANDING#121 of 266
SCORE137.8133.26–139.73 CI
FRONTIER LAGLaunched 7.6 months behindScores about what o1 did in December 2024.
SCORES LIKE THESE MODELS
Full Epoch Capabilities Index ranking ↗Qwen3-14BAlibaba · Apr 2025138.24
QwQ-32BAlibaba · Mar 2025137.6DeepSeek-R1-Distill-Qwen-32BDeepSeek · Jan 2025137.42Qwen3-30B-A3B-Instruct (Jul 2025)Alibaba · Jul 2025137.42
RELEASE DATEAug 5, 2025
WEIGHTSOpen weights
CONTEXT WINDOW131.1K
MAX OUTPUT32.8K
REASONINGYes
TOOL CALLINGYes
INPUTStext
OUTPUTStext
Specifications from Models.dev. Availability and limits may differ by provider. Benchmark scores come from Epoch AI under CC BY 4.0.