Claude Opus 5.5
COMING SOONAnthropic · 2026-09-22 · Context 1,000,000
Latest Opus for long-running agentic coding and knowledge work; near-Fable capability at a lower price, with adaptive thinking always on.
VisionTool callingReasoning
Providers
Different providers host this model; routing picks one and falls back on failure.
| Provider | In / Out | Latency | Status |
|---|---|---|---|
Anthropic anthropic | $4.00 / $20.00 | ~850ms | No key |
Quick call
cURL
curl https://allaiapp.com/api/v1/chat/completions \
-H "Authorization: Bearer $ALLAI_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model": "claude-opus-5-5", "messages": [{"role":"user","content":"Hello"}]}'