OpenAI gpt-oss-20b

Section ID: DOC-MODEL-otig24dkkq#overview

Open-weight model from OpenAI for text tasks, with reported support for tool calling, structured outputs and reasoning.

OpenAI — openai/gpt-oss-20b

Input modalities: Reported — text

Output modalities: Reported — text

Context: 131072 tokens

Input limit: Unknown

Output limit: 32768 tokens

Input character limit: Unknown

Tool calling: Supported

Structured output: Supported

Reasoning: Supported

Streaming: Unknown

Prompt caching: Unknown

New selection: Open (effective 2026-10-22)

Existing saved use: Undecided

All available models

Document ID: DOC-MODEL-otig24dkkq