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CATCH #1699 DETECTED SEP 28, 2026 18:28 UTC
THE CATCHscore 9/10
EXHIBIT 1699 · FLASH
Sep 28, 2026 18:28 UTC model api OpenRouter
OpenRouter API shows a new model ID: anthropic/claude-sonnet-5.5, suggesting an upcoming release from Anthropic.

✓ VERIFIED — BEAT THE ANNOUNCEMENT BY 0.0H · AUTO-VERIFIED AGAINST ANTHROPIC NEWS

READY TO POST:

looks like openrouter's api just listed a new anthropic model, claude-sonnet-5.5. wonder what's new with this one.

keep an eye out, claude-sonnet-5.5 just popped up in the openrouter models api. anthropic might have something cooking.

EVIDENCE — the receipts
New model id(s) appeared in OpenRouter's API model list:
https://openrouter.ai/api/v1/models

  + anthropic/claude-sonnet-5.5

A model id in a provider's live API usually predates the public announcement. High-confidence pre-announcement signal.

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