About Claude Opus 5.5
Claude Opus 5.5 is Anthropic's Opus-tier Multimodal LLM for complex coding, long-running agents, and knowledge work. It combines adaptive thinking with improved token efficiency and faster output than Claude Opus 5, while supporting text and image inputs.
The model is designed for high-autonomy work such as codebase migrations, software audits, research, and multi-step professional workflows. It includes the safeguards Anthropic applies to its most capable models; use cases involving biology or cybersecurity may be subject to additional access controls.
| Metric | Value |
|---|---|
| Context Length | 1,000,000 tokens |
| Max Output | 128,000 tokens |
| Multilingual | Yes |
Ready to build with Claude Opus 5.5?
Try Claude Opus 5.5 in the Workbench to prompt it, compare outputs, and iterate on prompts without writing any code. When you're ready to ship, call the same model from our API and build your own apps on top of it.
curl -sSf -X POST https://hub.oxen.ai/api/ai/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $OXEN_API_KEY" \
-d '{
"model": "claude-opus-5-5",
"messages": [
{
"role": "user",
"content": "Try sending a message."
}
]
}'API endpoint
See the API reference for request and response formats.
https://hub.oxen.ai/api/ai/chat/completions