New entriesSeptember 25, 2026Impact
Claude Opus 5.5 debuts at #1 on LMArena Text · Instruction Following
Claude Opus 5.5 appeared on the LMArena Text · Instruction Following leaderboard for the first time on Sep 25, 2026, placing #1 with 1535.
Why it matters
New entries near the top of LMArena Text · Instruction Following move the Instruction Following race on AIModelRace.
The details
- 1535 from 812 votes; early ratings carry wide confidence intervals and often move as votes accumulate.
Models in this story
Provenance: LMArena leaderboard published Sep 25, 2026; ratings from blind pairwise votes. Generated automatically from the published data. Sources: LMArena Text · Instruction Following leaderboard · LMArena leaderboard dataset (CC BY 4.0) See the race.