Prewire · case file · public copy of the record
FILE P343 PREWIRE receipts archive the live wire
CATCH #1243 DETECTED SEP 8, 2026 23:18 UTC
THE CATCHscore 9/10
EXHIBIT 1243 · FLASH
Sep 8, 2026 23:18 UTC lmarena lmarena.ai/leaderboard
A new anonymous model, "muse-spark-1-3-max-bhma-webdev," appeared on the LMArena leaderboard, suggesting a stealth release or unannounced model in testing.

READY TO POST:

looks like lmarena just added a new anonymous model, 'muse-spark-1-3-max-bhma-webdev', to the leaderboard. could be a stealth test before an official announcement.

new unreleased model spotted on lmarena: 'muse-spark-1-3-max-bhma-webdev'. wondering which lab is behind this one.

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

[anonymous codenames — likely stealth] (1)
  + muse-spark-1-3-max-bhma-webdev

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

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