Comfy-Org/ComfyUI · error · ValueError

Unknown OpenRouter model: {slug}

Error message

Unknown OpenRouter model: {slug}

What it means

Error "Unknown OpenRouter model: {slug}" thrown in Comfy-Org/ComfyUI.

Source

Thrown at comfy_api_nodes/nodes_openrouter.py:336

        seed: int,
        system_prompt: str = "",
    ) -> IO.NodeOutput:
        validate_string(prompt, strip_whitespace=True, min_length=1)
        slug: str = model["model"]
        spec = _MODELS_BY_SLUG.get(slug)
        if spec is None:
            raise ValueError(f"Unknown OpenRouter model: {slug}")

        reasoning_effort: str | None = model.get("reasoning_effort")
        search_context_size: str | None = model.get("search_context_size")

View on GitHub (pinned to 1c6d8d45b3)

Solutions

1. Select a known OpenRouter model slug.

When it happens

Trigger: Thrown at comfy_api_nodes/nodes_openrouter.py:336 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Comfy-Org/ComfyUI@1c6d8d45b3 (2026-08-14). Data as JSON: /api/errors/bead33ea65720673. Report an issue: GitHub.