Question 1

What is the cost of Claude Opus 4.1 by Vertex?

Accepted Answer

Claude Opus 4.1 by Vertex costs $15.00 per 1M input tokens and $75.00 per 1M output tokens. Cached reads cost $1.50 per 1M tokens. Cache writes cost $18.75 per 1M tokens.

Question 2

What is the context window of Claude Opus 4.1 by Vertex?

Accepted Answer

Claude Opus 4.1 by Vertex has a context window of 200K tokens. It supports up to 200K input tokens and can generate up to 32K output tokens.

Question 3

What are the capabilities of Claude Opus 4.1 by Vertex?

Accepted Answer

Claude Opus 4.1 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 Opus 4.1 support?

Accepted Answer

Claude Opus 4.1 by Vertex accepts text, image, pdf as input and can generate text as output.

Question 5

Does Claude Opus 4.1 by Vertex support reasoning?

Accepted Answer

Yes, Claude Opus 4.1 by Vertex supports advanced reasoning capabilities.

Question 6

Is Claude Opus 4.1 by Vertex open source?

Accepted Answer

No, Claude Opus 4.1 by Vertex has closed weights. The model is only available through the Vertex API.

Question 7

Does Claude Opus 4.1 support function calling?

Accepted Answer

Yes, Claude Opus 4.1 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 Opus 4.1?

Accepted Answer

Claude Opus 4.1 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 Opus 4.1 API

Input Modalities

Output Modalities

Standard (per 1M tokens)

Caching (per 1M tokens)