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#1 frontier model

👑 Claude Opus 5.5

Anthropic
Frontier rank
#1
of 25 tracked
Frontier score
97
100 = #1 on every board
Best placing
#1
Coding
Released
Sep 22
Claude Opus 5.5 · 2026
Claude Opus 5.5 against the field

Benchmarks

Frontier scoreAverage placing, 100 = #1 everywhere
  1. #1Claude Opus 5.597
  2. #2GPT-6 Astra95
  3. #3Claude Fable 5.184
  4. #4Gemini 4 Argon83
  5. #5GPT-6.1 Sol82
  6. #6Claude Opus 575
  7. #7GPT-6 Sol71
  8. #8Claude Fable 550
OverallArena Elo
  1. #1Gemini 4 Argon1534
  2. #2Claude Opus 5.51515
  3. #3Claude Fable 5.11510
  4. #4Claude Opus 51507
  5. #5Claude Opus 4.61503
Hard problemsArena Elo
  1. #1Gemini 4 Argon1548
  2. #2Claude Opus 5.51535
  3. #3Claude Opus 4.61527
  4. #4Claude Opus 51526
  5. #5Claude Fable 5.11526
CodingArena Elo
  1. #1Claude Opus 5.51813
  2. #2GPT-6 Astra1786
  3. #3Claude Sonnet 5.51774
  4. #4GPT-6.1 Sol1755
  5. #5Claude Fable 5.11744
AgentsAgent score
  1. #1Claude Opus 5.514.3
  2. #2GPT-6 Astra13.1
  3. #3Claude Fable 5.112.7
  4. #4Claude Sonnet 5.512
  5. #5GPT-6.1 Sol11.7
Arena leaderboards

Where it places

BoardPlacingScoreVotes
Overall#21515 Elo6,272
Hard problems#21535 Elo3,901
Coding#11813 Elo2,294
Agents#114.36,103

From blind head-to-head votes on Arena, published Oct 9, 2026. Variants (high, max) count once at their best.

From the lab's own announcement

Release

Claude Opus 5.5
Released Sep 22, 2026
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News

Latest on Claude Opus 5.5

#2 GPT-6 Astra ↓