OpenRouter error
OpenRouter 503 No available model provider meets your routing requirements: what it means and how to fix it
503 No available model provider meets your routing requirementsRetry? YesLast verified 2 documented fixes2 sources
What it means
There is no available model provider that meets your routing requirements. OpenRouter may include a Retry-After header on 503 responses indicating how many seconds to wait before retrying.
Causes
- Provider routing preferences exclude every available provider for the model
How to fix it
- Fix 1.
Honor Retry-After when present before retrying.
- Fix 2.
Relax provider routing preferences or add fallback models.
More OpenRouter errors
All 32 OpenRouter errors400 invalid_requestRetry? Not stated400 invalid_promptRetry? Not stated400 context_length_exceededRetry? Not stated400 max_tokens_exceededRetry? Not stated400 token_limit_exceededRetry? Not stated400 string_too_longRetry? Not stated400 invalid_imageRetry? Not stated400 image_too_largeRetry? Not stated
HTTP 503 at other providers
Compare 503 across providers503 ServiceUnavailableExceptionRetry? YesAmazon Bedrock503 Server ErrorRetry? YesAzure OpenAI503 - Server OverloadedRetry? YesDeepSeek API503 service_unavailableRetry? YesGemini API503 UNAVAILABLERetry? YesGemini API503 Service UnavailableRetry? YesGroq API503 Service unavailableRetry? YesMistral API503 service_unavailable_error server_is_overloadedRetry? YesOpenAI API503 UNAVAILABLERetry? YesVertex AI
FAQ
What does the OpenRouter error "503 No available model provider meets your routing requirements" mean?
There is no available model provider that meets your routing requirements. OpenRouter may include a Retry-After header on 503 responses indicating how many seconds to wait before retrying.
How do I fix OpenRouter "503 No available model provider meets your routing requirements"?
There are 2 documented fixes. Start with the first: Honor Retry-After when present before retrying.
Should I retry OpenRouter "503 No available model provider meets your routing requirements"?
Yes. The official docs treat this error as retryable.
Which other AI APIs return HTTP 503?
Per their official error docs: Amazon Bedrock (503 ServiceUnavailableException), Azure OpenAI (503 Server Error), DeepSeek API (503 - Server Overloaded), Gemini API (503 service_unavailable; 503 UNAVAILABLE), Groq API (503 Service Unavailable), Mistral API (503 Service unavailable), OpenAI API (503 service_unavailable_error server_is_overloaded), Vertex AI (503 UNAVAILABLE).
Sources
Last verified against 2 sources: OpenRouter's official docs and official SDK repositories.
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