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The Claude Opus 4 record is in the catalogue for transparency — we list every Claude Opus 4 variant from Anthropic even when we don’t serve it, so the catalogue stays authoritative. Tell us you want this one and we’ll weigh it against the hosting roadmap.
Your request goes into the customer-success queue with the model slug attached. The aggregate demand also feeds an internal most-requested dashboard — anonymous to staff, informs hosting priority.
Stav speaks the Anthropic Messages API. Point the Anthropic SDK at base_url="https://api.stav.ai/v1" and your existing code keeps working — including cache_control markers and thinking mode, which pass through to Anthropic verbatim. Set STAV_API_KEY and the curl below works.
curl https://api.stav.ai/v1/messages \
-H "Authorization: Bearer $STAV_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "claude-opus-4-20250514",
"max_tokens": 256,
"messages": [{"role": "user", "content": "Hello!"}]
}'Already using the OpenAI SDK? The same model is reachable at POST /v1/chat/completions — drop in the slug above as the model field and it works.
Sovereign-EU inference by default; the Smart Router lifecycle penalty drains traffic away from deprecating endpoints automatically. Add X-Stav-App-Id: <uuid> to attribute requests to a registered app.
Pick this model first.
Works — usually a fine pick.
Other models will serve you better.
Fit assertions set by the curator pipeline. 47 use cases mapped.
Model catalogue