Claude and structured output

[wmeints]

Hi, I tried using claude-sonnet-3-5-latest with structured output in an agent, but it doesn't output structured output. I also can't find anything in the docs about using claude for structured output. I tried getting structured output with gpt-4o instead and that works like a charm.

Here's the code that I used to try with Claude

class CreateUserStoryDescriptionResponse(BaseModel):
    story_description: str = Field(
        ...,
        description="The user story description based on the project information and task description",
    )

agent = Agent(
    name="Story generator",
    model=Claude(id="claude-sonnet-3-5-latest"),
    instructions=(
        "You're a world-class requirements engineer. ",
        "It's your job to generate a user story description. ",
        "Use 'As a <role>, I want <goal> so that <reason>' format to generate the story description.",
    ),
    response_model=CreateUserStoryDescriptionResponse,
    structured_outputs=True,
)

Is there a way to make this work with anthropic/claude?

[dirkbrnd]

Hi @wmeints
Have you seen this cookbook?

I'll make sure it makes its way to our docs.

[pleabargain]

I came here looking for structured output. printing to console is all well and good but I would like the option of saving the output as JSON/MD etc.

please advise