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)

ChatAnthropic200k tokens$16.3509 / $81.7545 · 1M

anthropic/claude-opus-4

Context
200k tokens
Completion cap
32,000
Tools
Yes
JSON
No
Released
2025-05-22

Call it from Geek Hub

Same OpenAI SDK. Change the base URL and the model id.

curl https://api.geekhub.mx/v1/chat/completions \
  -H "Authorization: Bearer $GEEKHUB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-opus-4",
    "messages": [{"role": "user", "content": "Hola"}]
  }'
Get an API key

Frequently asked questions

What is 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) Claude Opus 4 runs on the Geek Hub API (OpenAI-compatible). Model id: anthropic/claude-opus-4.
Is Claude Opus 4 free?
No. Input is $16.3509 per 1M tokens and output is $81.7545 per 1M tokens on Geek Hub (markup included).
What is the context length of Claude Opus 4?
Claude Opus 4 has a 200k tokens context window. It supports up to 32,000 completion tokens.
Does Claude Opus 4 support tool calling and structured outputs?
Claude Opus 4 accepts tools and tool_choice for function calling. Structured outputs are not listed for this endpoint.
When was Claude Opus 4 released?
Claude Opus 4 was released on 2025-05-22.

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