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#20 frontier model

GPT-5.5

OpenAI
Frontier rank
#20
of 25 tracked
Frontier score
14
100 = #1 on every board
Best placing
#13
Agents
Released
Apr 23
GPT-5.5 · 2026
GPT-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
  9. #20GPT-5.514
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
  6. #22GPT-5.51472
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
  6. #17GPT-5.51489
CodingArena Elo

GPT-5.5 isn't on this board yet.

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
  6. #13GPT-5.54.4
Arena leaderboards

Where it places

BoardPlacingScoreVotes
Overall#221472 Elo69,437
Hard problems#171489 Elo45,609
CodingNot on this board
Agents#134.454,385

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

GPT-5.5
Released Apr 23, 2026
✓ OpenAI →
News

Latest on GPT-5.5

↑ #19 Hy4#21 Gemini 3.1 Pro ↓