# gpt-oss-20b vs ZAYA1-8B (slim)

> gpt-oss-20b scores 69.9 (B) to ZAYA1-8B's 61 (C) for open-weight models you run yourself. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/gpt-oss-20b-vs-zaya1-8b.md (~9,150 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/gpt-oss-20b-vs-zaya1-8b.json · canonical https://www.anchorterminal.com/compare/gpt-oss-20b-vs-zaya1-8b
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-10
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gpt-oss-20b scores 69.9 (B) on agent readiness against ZAYA1-8B's 61 (C), and leads in 3 of 4 scored categories. ZAYA1-8B leads on documentation and upkeep. Both do open-weight models you run yourself.

- gpt-oss-20b: B 69.9, rank #8 of 160 open-weight models · https://www.anchorterminal.com/tools/gpt-oss-20b.min.md
- ZAYA1-8B: C 61, rank #85 of 160 open-weight models · https://www.anchorterminal.com/tools/zaya1-8b.min.md
- gpt-oss-20b, good for Local agents on a 24 GB GPU or Mac that want a permissive licence, wide runtime support and documented structured output, one tool call at a time Ahead on Reach, 90 against 80; Risk, 85 against 55; Agent interface, 90 against 60.
- ZAYA1-8B, good for People who want a small, fast reasoning model for maths and code and can live without tool calling Ahead on Documentation and upkeep, 50 against 42.

| Category | gpt-oss-20b | ZAYA1-8B |
| --- | --- | --- |
| Capability (35%) | pending | pending |
| Reach (25%) | 90 | 80 |
| Risk (20%) | 85 | 55 |
| Agent interface (10%) | 90 | 60 |
| Documentation and upkeep (10%) | 42 | 50 |

| Fact (where they differ) | gpt-oss-20b | ZAYA1-8B |
| --- | --- | --- |
| Vendor | OpenAI | Zyphra |
| Last release | 2025-08-26 | 2026-07-02 |
| Agent reviews | 3.5/5 (4) | none |

Why the edge:
- Risk, gpt-oss-20b +30: gpt-oss-20b 85 (File safety earns 25, since the weights are safetensors and metal/model.bin is OpenAI's own raw Metal format rather than pickle, and nothing in the repository r…); ZAYA1-8B 55 (File safety 25, safetensors only, no .bin, .pt or .pth files and no Python in the repository.)
- Agent interface, gpt-oss-20b +30: gpt-oss-20b 90 (The chat template earns 20, a Jinja file in the repository.); ZAYA1-8B 60 (Chat template 20, chat_template.jinja in the repository (10,700 characters).)
- Reach, gpt-oss-20b +10: gpt-oss-20b 90 (Memory earns 25, since OpenAI's own MXFP4 build is 13.76 GB and a fifth on top is 16.5 GB, just past the 16 GB band, and Ollama's 14 GB build lands in the same…); ZAYA1-8B 80 (Memory 30, the smallest build from Zyphra is the MXFP4-Experts repository, 5.85 GB, and 5.85 GB × 1.2 = 7.0 GB, within 16 GB.)
- Documentation and upkeep, ZAYA1-8B +8: gpt-oss-20b 42 (The model card earns 17, covering six of the seven points and missing a statement of supported languages.); ZAYA1-8B 50 (Model card 5, Intended use and the parameter counts are on the card.)