OpenAI · Text
GPT-OSS 20B
OpenAI's open-weight 20B reasoning model (Apache 2.0) with configurable reasoning effort and native tool calling — runs on 16 GB.
From OpenAI, GPT-OSS 20B is an open-weight text model. It takes a text prompt and replies with generated text. It runs entirely on your own hardware through Ollama: no API key and no per-use fees.
Modality
Text
Available on
Ollama
Model ID
ollama:gpt-oss:20b
Supported OS
macOSWindowsLinux
Minimum machine configuration
16 GB RAM · 128K ctx · text · GPU recommended
Download size · ~14 GB
Specs
- Pricing
- Free, runs on your hardware
About the creator
OpenAI
OpenAI builds GPT, DALL·E, the Sora family, and the open-weight gpt-oss models, and has been a central force behind the modern wave of generative AI.
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