{
  "output": [
    {
      "id": "rs_xxx",
      "type": "reasoning",
      "encrypted_content": "...",
      "summary": [
        {
          "type": "summary_text",
          "text": "..."
        }
      ]
    },
    {
      "type": "message",
      "content": [
        {
          "type": "output_text",
          "text": "Final answer"
        }
      ]
    }
  ]
}

response = client.responses.create(
    model="gpt-5.5",
    input="Which is larger, 9.11 or 9.9?",
    reasoning={"effort": "high", "summary": "detailed"}
)

for item in response.output:
    if item.type == "reasoning":
        for part in item.summary:
            if part.type == "summary_text":
                print("Thinking summary:", part.text)

{
  "content": [
    {
      "type": "thinking",
      "thinking": "..."
    },
    {
      "type": "text",
      "text": "Final answer"
    }
  ]
}

message = client.messages.create(
    model="claude-opus-4-8",
    max_tokens=320,
    thinking={
        "type": "enabled",
        "budget_tokens": 128
    },
    messages=[
        {"role": "user", "content": "Which is larger, 9.11 or 9.9?"}
    ]
)

for block in message.content:
    if block.type == "thinking":
        print("Thinking:", block.thinking)
    elif block.type == "text":
        print("Answer:", block.text)

{
  "usageMetadata": {
    "thoughtsTokenCount": 120
  }
}

data = response.json()
thoughts = data.get("usageMetadata", {}).get("thoughtsTokenCount", 0)
print("Thinking tokens:", thoughts)