LLM invocation settings for a routine or chain step. When present, overrides the agent-level model selection.
Optional
Provider-prefixed model identifier for this routine or step, e.g. "openrouter/anthropic/claude-sonnet-latest". When omitted, the agent's default model is used.
"openrouter/anthropic/claude-sonnet-latest"
LLM invocation settings for a routine or chain step. When present, overrides the agent-level model selection.