Claude · Schema

ThinkingBlock

A thinking content block showing Claude's internal reasoning process.

Artificial IntelligenceChatbotsConversational AIGenerative AILarge Language ModelsMachine-LearningNatural Language Processing

Properties

Name	Type	Description
type	string
thinking	string	Claude's internal reasoning text.
signature	string	A signature verifying the thinking block.

View JSON Schema on GitHub

JSON Schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "ThinkingBlock",
  "type": "object",
  "description": "A thinking content block showing Claude's internal reasoning process.",
  "properties": {
    "type": {
      "type": "string"
    },
    "thinking": {
      "type": "string",
      "description": "Claude's internal reasoning text."
    },
    "signature": {
      "type": "string",
      "description": "A signature verifying the thinking block."
    }
  }
}