For the complete documentation index, see llms.txt. Markdown versions of documentation pages are available by appending .md to the page URL.
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gpt-oss

Open-weight models are freely available base models that you can fine-tune or run locally.

Open Modelsgpt-ossOpenAI harmony

Run gpt-oss locally

How to run gpt-oss locally with LM Studio

How to run gpt-oss locally with LM Studio

gpt-ossOpen Models
How to run gpt-oss locally with Ollama

How to run gpt-oss locally with Ollama

gpt-ossOpen Models

Run gpt-oss on a server

How to run gpt-oss with Transformers

How to run gpt-oss with Transformers

gpt-ossOpen Models
How to run gpt-oss with vLLM

How to run gpt-oss with vLLM

gpt-ossOpen Models

Fine-tune gpt-oss

Fine-tuning with gpt-oss and Hugging Face Transformers

Fine-tuning with gpt-oss and Hugging Face Transformers

gpt-ossOpen Models
How to handle the raw chain of thought in gpt-oss

How to handle the raw chain of thought in gpt-oss

gpt-ossOpen Models
OpenAI Harmony Response Format

OpenAI Harmony Response Format

gpt-ossOpenAI harmonyOpen Models

Run gpt-oss with providers

Verifying gpt-oss implementations

Verifying gpt-oss implementations

gpt-ossOpen Models
How to handle the raw chain of thought in gpt-oss

How to handle the raw chain of thought in gpt-oss

gpt-ossOpen Models
OpenAI Harmony Response Format

OpenAI Harmony Response Format

gpt-ossOpenAI harmonyOpen Models

All recipes3

Build your own content fact checker with gpt-oss-120B, Cerebras, and Parallel
gpt-ossOpen ModelsReasoning
Jan 13, 2026
User guide for gpt-oss-safeguard
gpt-ossGuardrailsOpen Models
Oct 29, 2025
Fine-tune gpt-oss for better Korean language performance
gpt-ossOpen Models
Aug 26, 2025