ProviderConfig

Whether this provider appears in the model switcher.

Defaults to True. Set to False to hide a package-discovered provider and all its models from the /model selector. Useful when a LangChain provider package is installed as a transitive dependency but should not be user-visible.

List of model identifiers available from this provider.

Name of the environment variable that holds the API key.

This is the env var name (e.g., "OPENAI_API_KEY"), not the secret itself. The app resolves it at startup to verify credentials before model creation.

Custom base URL.

Fully-qualified Python class in module.path:ClassName format.

When set, create_model imports this class and instantiates it directly instead of calling init_chat_model.

Extra keyword arguments forwarded to the model constructor.

Flat keys (e.g., temperature = 0) are provider-wide defaults applied to every model from this provider. Model-keyed sub-tables (e.g., [params."qwen3:4b"]) override individual values for that model only; the merge is shallow (model wins on conflict).

Do not set api_key here — the early credential check runs before params are read, so the app will reject the model before it sees the key. Use api_key_env to point at an environment variable instead.

Overrides merged into the model's runtime profile dict.

Flat keys (e.g., max_input_tokens = 4096) are provider-wide defaults. Model-keyed sub-tables (e.g., [profile."claude-sonnet-4-5"]) override individual values for that model only; the merge is shallow.