Is Claude Opus 4 available on FastMetal?

Not at the moment. Claude Sonnet 5, from the same lab, is available on the FastMetal API today.

What is the context window of Claude Opus 4?

200,000 tokens, shared between the prompt and the response.

How does Claude Opus 4 rank?

#89 on the public arena's Japanese board (ELO 1,382). Ranks move as the leaderboard is updated.

Back to Models

anthropic/claude-opus-4

Not Available

Claude Opus 4

Claude Opus 4 is benchmarked as the world’s best coding model, at time of release, bringing sustained performance on complex, long-running tasks and agent workflows. It sets new benchmarks in software engineering, achieving leading results on SWE-bench (72.5%) and Terminal-bench (43.2%). Opus 4 supports extended, agentic workflows, handling thousands of task steps continuously for hours without degradation. Read more at the [blog post here](https://www.anthropic.com/news/claude-4)

5/22/2025

200,000 tokens

#76 Text (Creative Writing)

Specifications

Modalities

Input

image

text

file

Output

text

Supported Parameters

include_reasoning

max_tokens

reasoning

stop

temperature

tool_choice

tools

top_k

top_p

Max Output Tokens

32,000

Frequently asked questions

Is Claude Opus 4 available on FastMetal?: Not at the moment. Claude Sonnet 5, from the same lab, is available on the FastMetal API today.
What is the context window of Claude Opus 4?: 200,000 tokens, shared between the prompt and the response.
How does Claude Opus 4 rank?: #89 on the public arena's Japanese board (ELO 1,382). Ranks move as the leaderboard is updated.