Frontier rank
#34
of 40 tracked
Frontier score
-25
100 = #1 on every board
Best placing
#20
Agents
Released
Oct 7
Claude Haiku 5.5 · 2026
Claude Haiku 5.5 against the field
Benchmarks
Frontier scoreAverage placing, 100 = #1 everywhere
- #1Gemini 4 Carbon95
- #2Claude Opus 5.595
- #3GPT-6 Astra87
- #4Claude Fable 5.182
- #5Gemini 4 Argon78
- #6GPT-6.1 Sol76
- #7Claude Opus 4.674
- #8Claude Opus 567
- #34Claude Haiku 5.5-25
OverallArena Elo
Claude Haiku 5.5 isn't on this board yet.
Hard problemsArena Elo
Claude Haiku 5.5 isn't on this board yet.
CodingArena Elo
- #1Claude Opus 5.51810
- #2GPT-6 Astra1773
- #3Claude Sonnet 5.51770
- #4Gemini 4 Carbon1768
- #5GPT-6.1 Sol1751
- #32Claude Haiku 5.51589
AgentsAgent score
- #1Claude Opus 5.520.9
- #2Gemini 4 Carbon16
- #3Claude Sonnet 5.513.8
- #4Claude Fable 5.113.4
- #5GPT-6 Astra13
- #20Claude Haiku 5.51.4
Arena leaderboards
Where it places
| Board | Placing | Score | Votes |
|---|---|---|---|
| Overall | Not on this board | ||
| Hard problems | Not on this board | ||
| Coding | #32 | 1589 Elo | 4,758 |
| Agents | #20 | 1.4 | 29,343 |
From blind head-to-head votes on Arena, published Oct 28, 2026. Variants (high, max) count once at their best.
From the lab's own announcement
Release
Claude Haiku 5.5
Released Oct 7, 2026