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CATCH #1764 DETECTED SEP 30, 2026 21:21 UTC
THE CATCHscore 9/10
EXHIBIT 1764 · FLASH
Sep 30, 2026 21:21 UTC lmarena lmarena.ai/leaderboard
Two new anonymous models, "barium-bb-v2-4xts-agent" and "contenders/barium-bb-v2-4xts-agent", appeared on the LMArena leaderboard, suggesting a potential stealth model release.

READY TO POST:

lmarena just added two new anonymous models, "barium-bb-v2-4xts-agent" and "contenders/barium-bb-v2-4xts-agent" to their leaderboard. could be a new stealth model in testing!

seeing some new anonymous entries, barium-bb-v2-4xts-agent, on the lmarena leaderboard. labs often test unreleased models here, so this might be a sneak peek.

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

[anonymous codenames — likely stealth] (2)
  + barium-bb-v2-4xts-agent
  + contenders/barium-bb-v2-4xts-agent

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