infrastructure-model-routing-when-using-openrouter-models-in-litellm-1-82-1-the-e4bfe4fe

THEN Downgrade to LiteLLM 1.82.0 (and apply a one-line type patch for the complexity router if needed) or apply the fix from PR #23539: in get_llm_provider(), only pass the full 'openrouter/...' prefix for native models (e.g., openrouter/auto, openrouter/free) that have no additional '/'; for all other models, strip the prefix before sending to the API.

if model.startswith('openrouter/'):
    remainder = model[len('openrouter/'):]
    if '/' not in remainder:  # native model
        pass
    else:  # non-native model, strip prefix
        model = remainder