Question 1

What is the cost of Claude Sonnet 4.5 by OpenCode Zen?

Accepted Answer

Claude Sonnet 4.5 by OpenCode Zen 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 4.5 by OpenCode Zen?

Accepted Answer

Claude Sonnet 4.5 by OpenCode Zen has a context window of 1.0M tokens. It supports up to 1.0M input tokens and can generate up to 64K output tokens.

Question 3

What are the capabilities of Claude Sonnet 4.5 by OpenCode Zen?

Accepted Answer

Claude Sonnet 4.5 by OpenCode Zen 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 4.5 support?

Accepted Answer

Claude Sonnet 4.5 by OpenCode Zen accepts text, image, pdf as input and can generate text as output.

Question 5

Does Claude Sonnet 4.5 by OpenCode Zen support reasoning?

Accepted Answer

Yes, Claude Sonnet 4.5 by OpenCode Zen supports advanced reasoning capabilities.

Question 6

Is Claude Sonnet 4.5 by OpenCode Zen open source?

Accepted Answer

No, Claude Sonnet 4.5 by OpenCode Zen has closed weights. The model is only available through the OpenCode Zen API.

Question 7

Does Claude Sonnet 4.5 support function calling?

Accepted Answer

Yes, Claude Sonnet 4.5 by OpenCode Zen 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 4.5?

Accepted Answer

Claude Sonnet 4.5 by OpenCode Zen has a knowledge cutoff date of 2025-07-31. This means the model was trained on data available up until that date.

Claude Sonnet 4.5 API

Input Modalities

Output Modalities

Standard (per 1M tokens)

Caching (per 1M tokens)

Claude Sonnet 4.5 API

Input Modalities

Output Modalities

Standard (per 1M tokens)

Caching (per 1M tokens)