Claude Fable 5.1 vs Claude Opus 5.5 对比

# Python - Claude Fable 5.1：长周期智能体任务，默认 high effort
import anthropic

client = anthropic.Anthropic()

response = client.messages.create(
    model="claude-fable-5-1",
    max_tokens=8000,
    output_config={"effort": "high"},
    tools=[
        {"type": "bash_20250124", "name": "bash"},
        {"type": "text_editor_20250728", "name": "str_replace_based_edit_tool"},
    ],
    messages=[
        {
            "role": "user",
            "content": (
                "Refactor the payment reconciliation module across all "
                "affected files, keep existing tests green, and explain "
                "every non-obvious tradeoff you made."
            ),
        }
    ],
)

for block in response.content:
    if block.type == "thinking":
        print("[thinking]", block.thinking[:200])
    elif block.type == "text":
        print("[answer]", block.text)

# 注意：effort 不是通过扁平的 effort= 参数传递，而是在 output_config 中设置。
# 在 Fable 5.1 中，通过 tool_choice 强制工具调用已不再受支持；模型
# 会自行选择工具，否则 API 会返回 400 invalid_request_error 错误。

# Python - Claude Opus 5.5：通用任务，默认 medium effort
import anthropic

client = anthropic.Anthropic()

response = client.messages.create(
    model="claude-opus-5-5",
    max_tokens=4096,
    # 如果不提供 output_config，将使用默认的 "medium"；如果在高难度评测
    # 类别中得分不足，可尝试更高的等级：
    # output_config={"effort": "xhigh"},
    messages=[
        {
            "role": "user",
            "content": "Summarize this quarter's support tickets into 5 themes with counts.",
        }
    ],
)

for block in response.content:
    if block.type == "text":
        print(block.text)

# 注意：Opus 5.5 中 thinking 始终开启；发送 thinking={"type": "disabled"}
# 在任何 effort 等级下都会返回 400 invalid_request_error 错误。旧版
# computer_20251124 computer-use 工具在 Claude API 和 Google Cloud 上也
# 不再被接受，需要迁移到最新的工具版本。