Model unavailable errors across LLM providers
How model unavailable errors show up across Gemini, OpenAI, Anthropic, OpenRouter and more, and how to route around them.
Model-unavailable errors spike around deprecations, renames, and staged regional rollouts: the model id your agent was built with simply stops resolving. Hardcoded model names are the root cause — routing by capability instead of by id means a retired model never takes your agent down with it.
| Code | Error | Affected teams / 30 days | |
|---|---|---|---|
| 401 |  OpenCode Zen 401: "Model is not supported" |
119 | View |
| 404 |  OpenRouter 404 — No endpoints found for model |
80 | View |