GPT OSS 20b specs, prices, where it runs and its benchmark standing

Name: GPT OSS 20b
Author: OpenAI

top 10 on 0 of 1 · released Aug 5, 2025

Provider: OpenAI
Release date: Aug 5, 2025; Pricing
Parameters: 20.9B total; Hugging Face
Modalities: Text to Text; OpenRouter
License: Apache 2.0; Hugging Face
Context window: 131K tokens; Pricing
Pricing: $0.0 in / $0.02 out per 1M tokens; All prices
Hosting: 11 priced API routes · AWS Bedrock (15 regions) · OpenRouter · self-host: weights on Hugging Face; Pricing Regions
Hardware: Estimate: about 23 GB of weights as published (U8), about 21 GB at 8-bit, about 10 GB at 4-bit, plus memory for the context; Hugging Face config
Benchmarks: 1 board captured

Rank	Board	Category	Score	Of	Over time
80	MMLU-ProReasoning · stale since 2026-03-11 · as “GPT-oss-20B(high)”	Reasoning	73.6%	100

Versions and release history

2 versions in this line since Aug 5, 2025, from Pricing, OpenRouter and the boards.

Version	Released	Source
GPT OSS 20Bthis model	Aug 5, 20251 year ago	Pricing
gpt-oss-120B	Aug 5, 20251 year ago	Boards

Category ranks, more models and catalog changes