gpt-oss-20b
by OpenAI
gpt-oss-20b is an open-weight 21B parameter model released by OpenAI under the Apache 2.0 license. It uses a Mixture-of-Experts (MoE) architecture with 3.6B active parameters per f
Models
gpt-oss-20b
Added 10 July 2026
Overview
gpt-oss-20b is an open-weight 21B parameter model released by OpenAI under the Apache 2.0 license. It uses a Mixture-of-Experts (MoE) architecture with 3.6B active parameters per forward pass, optimized for...
How to use / API access
Call via OpenRouter with model id `openai/gpt-oss-20b`.
- openrouter ·
openai/gpt-oss-20bDocs
OpenRouter id: openai/gpt-oss-20b
Benchmarks
- Intelligence Index (artificial-analysis) : 14.9 index
- Coding Index (artificial-analysis) : 20.7 index
- Agentic Index (artificial-analysis) : 3.1 index
- Design Arena dataviz (other) : 969 elo · #98
- Design Arena website (other) : 883 elo · #113
Notes
gpt-oss-20b is listed in the EDNA Models directory from the OpenRouter catalogue.
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