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Checked Active: 2026-10-15
OpenAI
gpt-oss (local)
OpenAI's open-weight reasoning models. 20B runs on a 16 GB GPU or Mac; 120B needs about 80 GB.
Evaluation Analysis: Tools and thinking, text only. Plan on RAM or VRAM of roughly the download size plus 2 to 4 GB for context.
Context Window128K
Input Price / 1MFree (local)
Output Price / 1MFree (local)
Release Date2025-08
Run it locally
ollama run gpt-oss:20b- Ollama tag
- gpt-oss:20b (also 120b)
- LM Studio name
- openai/gpt-oss-20b (also openai/gpt-oss-120b)
- Download size by quantization
- 20B 14 GB; 120B 65 GB (as shipped by Ollama)
- License
- Apache 2.0
Memory needed is roughly the download size plus 2 to 4 GB for context. See how to run AI locally.
Specs and prices checked 2026-10-15 against the official page.