New #1October 15, 2026Impact
Claude Opus 5.5 takes #1 on LMArena Text · Instruction Following
On the LMArena Text · Instruction Following leaderboard published Oct 15, 2026, Claude Opus 5.5 moved from #2 to #1 with 1536, ahead of Gemini 4 Argon (1536).
Why it matters
LMArena Text · Instruction Following is the source for the Instruction Following race on AIModelRace, so the race leader follows it.
The details
- Claude Opus 5.5: 1536 from 2,851 votes.
- Gemini 4 Argon: 1536.
- Ranks here are by rating among all models on the board; LMArena's own rank also accounts for confidence intervals.
Models in this story
Provenance: LMArena leaderboard published Oct 15, 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.