Prewire · case file · public copy of the record
FILE P324 PREWIRE receipts archive the live wire
CATCH #1724 DETECTED SEP 29, 2026 17:20 UTC
THE CATCHscore 8/10
EXHIBIT 1724 · FLASH
Sep 29, 2026 17:20 UTC lmarena lmarena.ai/leaderboard
A new Claude model, claude-sonnet-5-5-high, appeared on the LMArena leaderboard, suggesting a potential upcoming release.

✓ VERIFIED — BEAT THE ANNOUNCEMENT BY 39.2H · AUTO-VERIFIED AGAINST ANTHROPIC NEWS

READY TO POST:

looks like anthropic might be cooking up a new claude-sonnet-5-5-high model, it just popped up on the lmarena leaderboard.

keep an eye out for claude-sonnet-5-5-high! lmarena often lists models before they're officially announced.

EVIDENCE — the receipts
LMArena: 1 new model appeared on the leaderboard
(labs test unreleased models here — often weeks before launch)

[named / preview] (1)
  + claude-sonnet-5-5-high

caught by the 20-minute sweep · the live wire · all receipts

THE WIRE RECEIPTS ACCESS @VEDOLOS TERMS PRIVACY break the story before it breaks