What this model error usually means
Mistral: Devstral 2 2512 returning 400 / model capability unsupported means you should first confirm whether model ID mistralai/devstral-2512 is visible for this Mistral AI key, then separate permission, context, capability, rate limit, or route issues.
- Model: mistralai/devstral-2512
- Provider: Mistral AI
- Status code: 400