About Claude Sonnet 4.5
Claude Sonnet 4.5 is a Multimodal LLM balancing speed and capability for coding, agent-based tasks, and computer use. It delivers high performance in reasoning, math, and domain-specific knowledge across fields like finance, law, and STEM.
Ready to build with Claude Sonnet 4.5?
Try Claude Sonnet 4.5 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-sonnet-4-5",
"messages": [
{
"role": "user",
"content": "Try sending a message."
}
]
}'API endpoint
See the API reference for request and response formats.
POST
https://hub.oxen.ai/api/ai/chat/completions