Amazon Bedrock で OpenAI GPT-5.5 / GPT-5.4 が GA になったので Responses API で試してみた

pip install openai aws-bedrock-token-generator "botocore[crt]"

from aws_bedrock_token_generator import provide_token
from openai import OpenAI

token = provide_token(region="us-east-2")
client = OpenAI(
    base_url="https://bedrock-mantle.us-east-2.api.aws/openai/v1",
    api_key=token,
)

response = client.responses.create(
    model="openai.gpt-5.5",
    input=[
        {"role": "developer", "content": "You are a helpful assistant. Be concise."},
        {"role": "user", "content": "What is Amazon Bedrock in one sentence?"},
    ],
    reasoning={"effort": "medium"},
)

print(response.output_text)
print(f"Input: {response.usage.input_tokens} / Output: {response.usage.output_tokens}")

Amazon Bedrock is a fully managed AWS service for building and scaling generative AI applications using foundation models from leading AI companies and Amazon.
Input: 28 / Output: 31

TOKEN=$(python3 -c 'from aws_bedrock_token_generator import provide_token; print(provide_token(region="us-east-2"))')

curl -s "https://bedrock-mantle.us-east-2.api.aws/openai/v1/responses" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $TOKEN" \
  -d '{
    "model": "openai.gpt-5.5",
    "input": [
      {"role": "user", "content": "What is the capital of Japan?"}
    ],
    "reasoning": {"effort": "low"}
  }'

{
  "id": "resp_xxx",
  "model": "openai.gpt-5.5",
  "object": "response",
  "status": "completed",
  "output": [
    {
      "id": "msg_xxx",
      "type": "message",
      "role": "assistant",
      "status": "completed",
      "content": [
        {
          "type": "output_text",
          "text": "The capital of Japan is Tokyo."
        }
      ]
    }
  ],
  "reasoning": {
    "effort": "low",
    "summary": null,
    "context": "current_turn"
  },
  "usage": {
    "input_tokens": 26,
    "output_tokens": 11,
    "output_tokens_details": { "reasoning_tokens": 0 },
    "total_tokens": 37
  }
}

response = client.responses.create(
    model="openai.gpt-5.4",
    input=[{"role": "user", "content": "Explain why the sky is blue in one sentence."}],
    reasoning={"effort": "high"},
)

{
  "id": "resp_xxx",
  "model": "openai.gpt-5.4",
  "object": "response",
  "status": "completed",
  "output": [
    {
      "id": "rs_xxx",
      "type": "reasoning",
      "summary": []
    },
    {
      "id": "msg_xxx",
      "type": "message",
      "role": "assistant",
      "status": "completed",
      "content": [
        {
          "type": "output_text",
          "text": "The sky looks blue because molecules in Earth's atmosphere scatter the shorter, bluer wavelengths of sunlight more strongly than the longer, redder wavelengths."
        }
      ]
    }
  ],
  "reasoning": {
    "effort": "high",
    "summary": null,
    "context": "current_turn"
  },
  "usage": {
    "input_tokens": 16,
    "output_tokens": 51,
    "output_tokens_details": { "reasoning_tokens": 16 },
    "total_tokens": 67
  }
}

token = provide_token(region="us-west-2")
client_oregon = OpenAI(
    base_url="https://bedrock-mantle.us-west-2.api.aws/openai/v1",
    api_key=token,
)

response = client_oregon.responses.create(
    model="openai.gpt-5.4",
    input=[{"role": "user", "content": "Hello from Oregon!"}],
    reasoning={"effort": "high"},
)

from openai import NotFoundError

try:
    response = client_oregon.responses.create(
        model="openai.gpt-5.5",
        input=[{"role": "user", "content": "Hello"}],
        reasoning={"effort": "medium"},
    )
except NotFoundError as e:
    print("GPT-5.5 is not available in us-west-2")
    print(e)

response = client.responses.create(
    model="openai.gpt-5.5",
    input=[
        {"role": "developer", "content": "日本語で簡潔に回答してください。"},
        {"role": "user", "content": "Amazon Bedrock とは何ですか？"},
    ],
    reasoning={"effort": "medium"},
)

Amazon Bedrock は、AWS 上で複数の基盤モデルを利用して生成 AI アプリケーションを構築・運用できるマネージドサービスです。