Anthropic / Model reference

Claude Fable 5.1

Name: Claude Fable 5.1
Author: Anthropic

Anthropic model available through the Celeste SDK. Explore its supported operations and parameters.

See the code

Model IDclaude-fable-5-1

What it can do.

Streaming

celeste.documents.analyzeAnalyze documents

celeste.images.analyzeAnalyze images

celeste.text.generateGenerate text

Parameters.

Supported controls from Celeste’s model registry. Values and availability differ between models.

Claude Fable 5.1 parameters and constraints
Parameter	Accepted values
`document`	documents
`image`	Image artifacts
`max_tokens`	0 – 128000
`output_schema`	Pydantic BaseModel
`thinking_level`	`lowmediumhighxhighmax`
`tool_choice`	`autonone`
`tools`	List of tool definitions

Start with a few lines

Put it to work.

Use your provider credentials. Call the model through the SDK and build around its output.

import celeste
response = await celeste.text.generate(
    model="claude-fable-5-1",
    prompt="Write a project brief for a neighborhood repair café."
)
print(response.content)

This example uses text.generate. Explore the quickstart for installation and authentication.