Question 1

What is the cost of Claude Sonnet 4 by Vertex?

Accepted Answer

Claude Sonnet 4 by Vertex costs $3.00 per 1M input tokens and $15.00 per 1M output tokens. Cached reads cost $0.30 per 1M tokens. Cache writes cost $3.75 per 1M tokens.

Question 2

What is the context window of Claude Sonnet 4 by Vertex?

Accepted Answer

Claude Sonnet 4 by Vertex has a context window of 200K tokens. It supports up to 200K input tokens and can generate up to 64K output tokens.

Question 3

What are the capabilities of Claude Sonnet 4 by Vertex?

Accepted Answer

Claude Sonnet 4 by Vertex supports advanced reasoning, tool calling/function calling, adjustable temperature, file attachments. It has closed weights.

Question 4

What input and output types does Claude Sonnet 4 support?

Accepted Answer

Claude Sonnet 4 by Vertex accepts text, image, pdf as input and can generate text as output.

Question 5

Does Claude Sonnet 4 by Vertex support reasoning?

Accepted Answer

Yes, Claude Sonnet 4 by Vertex supports advanced reasoning capabilities.

Question 6

Is Claude Sonnet 4 by Vertex open source?

Accepted Answer

No, Claude Sonnet 4 by Vertex has closed weights. The model is only available through the Vertex API.

Question 7

Does Claude Sonnet 4 support function calling?

Accepted Answer

Yes, Claude Sonnet 4 by Vertex supports tool calling (also known as function calling), allowing it to interact with external tools and APIs during conversations.

Question 8

What is the knowledge cutoff date for Claude Sonnet 4?

Accepted Answer

Claude Sonnet 4 by Vertex has a knowledge cutoff date of 2025-03-31. This means the model was trained on data available up until that date.

Claude Sonnet 4 API

Input Modalities

Output Modalities

Standard (per 1M tokens)

Caching (per 1M tokens)