> ## Documentation Index > Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # GenerationContentDataOutput The output from the generation ## Fields | Field | Type | Required | Description | Example | | ------------ | ---------------- | -------------------- | --------------------------------- | -------------------------------------------------- | | `completion` | *Nullable\[str]* | :heavy\_check\_mark: | The completion output | The meaning of life is a philosophical question... | | `reasoning` | *Nullable\[str]* | :heavy\_check\_mark: | Reasoning/thinking output, if any | null |