gpt-oss-20b

apache-2.020B

- Text in/text out only - Chat Completions API - Streaming - Function calling - Structured outputs - Reasoning - Available via managed compute and Foundry Local

Intelligence
Reasoning
Speed
Context
131K
Max output
131K

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode
Infrastructure
Streaming
Batch Processing

Details

Provider Azure AI Foundry
Creator OpenAI
Familygpt-oss
Licenseapache-2.0
Statusactive
Typechat
Input modalitiestext
Output modalitiestext
Open weightYes
Parameters20B
Architecture—
Context window131K tokens
Max input—
Max output131K tokens
Reasoning tokensYes
Knowledge cutoff
Release date—
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Family Comparison: gpt-oss

ModelContextMax out
gpt-oss-120b 1131K131K
gpt-oss-20b131K131K
gpt-oss——

API

GET/v1/models/azure/gpt-oss-20b