OpenAI · gptoss
Can I run gpt-oss-safeguard?
gpt-oss-safeguard-20b and gpt-oss-safeguard-120b are safety reasoning models built-upon gpt-oss
Parameter counts and memory belong to each build below. A family can contain several sizes and tasks; fitting in memory is not a quality ranking.
Calculate memory for a build and contextgpt-oss-safeguard system requirements
Memory needed at 4K context, counting model weights, KV cache, compute buffers and runtime overhead. Download sizes come from the official Ollama registry.
| Build | Quantization | Download | Memory needed |
|---|---|---|---|
| gpt-oss-safeguard:20b20B parameters (tag)128K documented maximum contextBuild sourceCatalog checked 2026-10-13 | MXFP4 | 12.8 GB | ~14.5 GB |
| gpt-oss-safeguard:120b120B parameters (tag)128K documented maximum contextBuild sourceCatalog checked 2026-10-13 | MXFP4 | 60.9 GB | ~66.4 GB |
Showing the 2 smallest non-alias builds. Choose any build and change the context. A context above the build's documented maximum is a hypothetical calculation, not a supported setting.
How to run gpt-oss-safeguard locally
- 1.Install Ollama for Windows, macOS or Linux.
- 2.Download this exact build in a terminal:
ollama pull gpt-oss-safeguard:20b - 3.Check the source for the build's task. For text generation, run
ollama run gpt-oss-safeguard:20b. Base/text builds may need a prompt template; an instruct build is usually the appropriate starting point for a conversation.
Frequently asked questions about gpt-oss-safeguard
- How much VRAM do I need to run gpt-oss-safeguard?
- At 4K context, the smallest published build of gpt-oss-safeguard (MXFP4) needs roughly 14.5 GB of GPU memory once weights, KV cache, compute buffers and runtime overhead are counted. Bigger quantizations and longer context windows need more. It can also run partly or entirely on the CPU using system RAM, more slowly.
- Can I run gpt-oss-safeguard without a dedicated GPU?
- A supported CPU runtime can use system RAM. The smallest listed build needs an estimated 14.5 GB at 4K context, plus headroom for your operating system. Check the build's runtime requirements. We have not measured its speed on your CPU.
- How big is the gpt-oss-safeguard download?
- The smallest published build is 12.8 GB. There are 2 builds in total, the largest being 60.9 GB. Leave some extra free disk space beyond the download itself.
- How do I run gpt-oss-safeguard locally?
- Install Ollama, then download a specific build with "ollama pull gpt-oss-safeguard:20b". For a build that supports text generation, use ollama run with the same tag. Check the model source for its task and prompt format.
Will gpt-oss-safeguard run on your PC?
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Model data from the official Ollama registry · verified 13/10/2026