[gkbrk]

Nope, for closed models too. Claude for example has multiple providers they work with. Google Vertex, Amazon Bedrock and Anthropic themselves all provide inference for Claude.

The vast majority of models on OpenRouter (both closed and open) have multiple providers.

[simianwords]

Interesting. I would think they would safeguard core IP from competitors.

[OJFord]

Also you might be fine with routing to a different model.