Anthropic / Model reference

Claude Sonnet 4

Name: Claude Sonnet 4
Author: Anthropic

Anthropic's smart model for complex agents and coding

See the code

Model IDclaude-sonnet-4-20250514

What it can do.

Streaming

celeste.text.generateGenerate text

celeste.images.analyzeUnderstand media

Parameters.

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

Claude Sonnet 4 parameters and constraints
Parameter	Accepted values
`max_tokens`	1 – 64000
`thinking_budget`	-1 – 64000
`tools`	List of tool definitions
`image`	Image artifacts

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-sonnet-4-20250514",
    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.