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CATCH #1994 DETECTED OCT 11, 2026 21:20 UTC
THE CATCHscore 8/10
EXHIBIT 1994 · FLASH
Oct 11, 2026 21:20 UTC lmarena lmarena.ai/leaderboard
Two new Claude Opus 5.5-max-vertex-agent models, one labeled as a 'contender,' appeared on the LMArena leaderboard, suggesting unannounced model testing.

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READY TO POST:

looks like lmarena added 'claude-opus-5.5-max-vertex-agent' to the leaderboard. testing unreleased models maybe?

a 'contenders/claude-opus-5.5-max-vertex-agent' also popped up on lmarena. interesting to see what claude is testing.

EVIDENCE — the receipts
LMArena: 2 new models appeared on the leaderboard
(labs test unreleased models here — often weeks before launch)

[named / preview] (2)
  + claude-opus-5.5-max-vertex-agent
  + contenders/claude-opus-5.5-max-vertex-agent

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