Anthropic

Claude Opus 5 API

Strongest Claude Opus model for coding, agents, and professional work

Use this model

Context

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Input

$5 / 1M tokens

Output

$25 / 1M tokens

ReasoningToolsFilesVision1M
curl https://api.onemux.net/v1/chat/completions \
+  -H "Authorization: Bearer $ONEMUX_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"model":"gpt-4o","messages":[{"role":"user","content":"Hello OneMux"}]}'