New #1September 13, 2026Impact
Claude Opus 5 takes #1 on LMArena Text · Life, Physical & Social Science
On the LMArena Text · Life, Physical & Social Science leaderboard published Sep 13, 2026, Claude Opus 5 moved from #2 to #1 with 1531, ahead of Claude Fable 5.1 (1526).
Why it matters
LMArena Text · Life, Physical & Social Science is the source for the Science Q&A race on AIModelRace, so the race leader follows it.
The details
- Claude Opus 5: 1531 from 3,410 votes.
- Claude Fable 5.1: 1526.
- 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 Sep 13, 2026; ratings from blind pairwise votes. Generated automatically from the published data. Sources: LMArena Text · Life, Physical & Social Science leaderboard · LMArena leaderboard dataset (CC BY 4.0) See the race.