gpt-oss-120b

reasoning

\

Intelligence
Reasoning
Speed
Context
131K
Max output
131K
Capabilities
vision
tool call
structured output
reasoning
json mode
streaming
fine tuning
batch
Details
Provider OpenAI
Creator OpenAI
Familygpt-oss
Statusactive
Input modalitiestext
Output modalitiestext
Knowledge cutoff2024-05
Release date—
Deprecation date—
Typereasoning
Reasoning tokensYes
Max input—
Sourceofficial
Last updated2026-03-21
Tools
Function Callingfunction_calling
Call external functions and APIs
Code Interpretercode_interpreter
Execute code in a sandbox
MCPmcp
Connect to Model Context Protocol servers
Web Searchweb_search
Search the web for information
Endpoints
ResponsesPOST
Stateful multi-turn conversationshttps://api.openai.com/v1/responses
BatchPOST
Async batch processing at lower costhttps://api.openai.com/v1/batches
Family Comparison: gpt-oss
ModelContextMax outInputOutput
gpt-oss-120bRTS
131K131K——
gpt-oss-20bRTS
131K131K——
API
GET/v1/models/openai/gpt-oss-120b