Coding · sub-raceDominant lead
React Web Apps race
Building React apps from a prompt, judged by blind votes on the rendered result.
- Leader
- Opus 5.5
- Margin
- 38 Elo
- 2.1% ahead
- Weeks at #1
- 5
- in a row
- Changes
- 8
- in 2026
Warming up the track…
Oct 20, 2026Opus 5.5 leads
2025Apr ’25Jul ’25Oct ’252026Apr ’26Jul ’26Oct ’26
Score history
Top 6 today over the leader's frontier · click to jump to a week
#1 frontierOpus 5.5Sonnet 5.5GPT-6 AstraFable 5.1GPT-6.1 SolQwen3.8-Max
Reigns at #1
Longest: Opus 4.7, 8 weeks (from Apr 2026).
Sibling races
More coding races
Why this race matters
React is the most common front-end stack; this isolates it from other frameworks.
How it is scored
LMArena WebDev leaderboard, React subset: ratings from blind pairwise votes.
Unit: eloHigher is betterPhoto finish under 5 EloDominant over 30 Elo
Data provenance
Blind pairwise votes, reported as Bradley-Terry ratings on an Elo scale. Data: lmarena-ai/leaderboard-dataset, CC BY 4.0.
LMArena WebDev · React · LMArena
Weekly history from the source's published leaderboards.
55 tracked models with a result (132 entries on the source board) · newest data October 19, 2026.