gpt-oss 20B
20.9B total, 4.2B active · 128k context · apache-2.0 · released 2025-08-04
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What to run it on in the US
Fully in memory at 128k context, priced at retailers today.
Something we price holds it fully in memory, but none reaches 15 tok/s, our bar for recommending it. The table below has the speeds.
All hardware that runs it
Everything we price, best value first. Two cards split the model by layers.
1 other card or machine we price cannot hold it at this context.
Memory needed
Weights, KV cache and runtime buffers at each context length (KV cache at fp16).
| Quant | File | @8k | @32k | @64k | @128k |
|---|---|---|---|---|---|
| MXFP4gguf | 11.3 GB | 12.2 GB | 12.9 GB | 13.9 GB | 15.7 GB |
Run it
Copy a command for the runtime you use.
- MXFP4
- Ollama
ollama run hf.co/ggml-org/gpt-oss-20b-GGUF:MXFP4 - LM Studio
lms get ggml-org/gpt-oss-20b-GGUF@mxfp4 - llama.cpp
llama-server -hf ggml-org/gpt-oss-20b-GGUF:MXFP4
- Ollama