Big movesSeptember 13, 2026Impact
Claude Opus 4.8 climbs from #15 to #9 on LMArena Document
On the LMArena Document leaderboard published Sep 13, 2026, Claude Opus 4.8 rose 6 places to #9 (1475).
Why it matters
Large single-update moves usually follow a model update or a wave of new votes.
The details
- Previous update: #15. Now: #9 with 1475.
Models in this story
Provenance: LMArena leaderboard published Sep 13, 2026; ratings from blind pairwise votes. Generated automatically from the published data. Sources: LMArena Document leaderboard · LMArena leaderboard dataset (CC BY 4.0) See the race.