Result Metadata

Every GenerateResult includes metadata:

const result = await generate(model, schema, prompt);

console.log(result.metadata);
// { provider: "groq", model: "llama-3.3-70b-versatile", latencyMs: 284 }

interface ResultMetadata {
  provider: string;
  model: string;
  latencyMs: number;
  tokens?: { input: number; output: number };
  finishReason?: string;
  requestId?: string;
  cost?: number;
}

provider, model, and latencyMs are always populated by the core (parsed from model.id, measured around the call). tokens, finishReason, requestId, and cost are reserved for a future backend hook that surfaces the underlying API response's usage data - they're undefined today, on every backend.