gpt-oss-120b 1

apache-2.0120B

- Text in/text out only - Chat Completions API - Streaming - Function calling - Structured outputs - Reasoning - Available for deployment 1 and via managed compute

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

Model IDgpt-oss-120b
Provider Azure AI Foundry
Creator OpenAI
Familygpt-oss
Licenseapache-2.0
Statusactive
Typechat
Input modalitiestext
Output modalitiestext
Open weightYes
Parameters120B
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-120b

gpt-oss-120b 1

gpt-oss-120b

- Text in/text out only - Chat Completions API - Streaming - Function calling - Structured outputs - Reasoning - Available for deployment 1 and via managed compute

Changes · 5 entries
gpt-oss-120bupdateca7a400Nov 2, 2026, 03:02 AM
namegpt-oss-120b→gpt-oss-120b 1
capabilitiestool callyesstructured outputyesreasoningyesjson modeyes
description- Text in/text out only - Chat Completions API - Streamin...
knowledge_cutoff2024-05-31
context_window131072
max_output_tokens131072
tagline- Text in/text out only - Chat Completions API - Streamin...
tools["function_calling"]
gpt-oss-120bupdate73d11c6May 18, 2026, 03:39 AM
namegpt-oss-120b→gpt-oss-120b 1
description- Text in/text out only - Chat Completions API - Streamin...
knowledge_cutoff2024-05-31
context_window131072
max_output_tokens131072
tagline- Text in/text out only - Chat Completions API - Streamin...
tools["function_calling"]
gpt-oss-120bupdate2b100acMar 23, 2026, 05:30 AM
parameters120
gpt-oss-120bupdate7a4f1f6Mar 22, 2026, 05:43 AM
model_typechat
gpt-oss-120bcreate7f5c66fMar 21, 2026, 05:16 AM