SIRumors
← Best frontier models
#26 frontier model

GPT-5.6 Sol

OpenAI
Frontier rank
#26
of 40 tracked
Frontier score
-11
100 = #1 on every board
Best placing
#11
Agents
Released
Jun 26
GPT-5.6 · 2026
GPT-5.6 Sol 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. #26GPT-5.6 Sol-11
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. #37GPT-5.6 Sol1457
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. #26GPT-5.6 Sol1484
CodingArena Elo

GPT-5.6 Sol 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. #11GPT-5.6 Sol6.2
Arena leaderboards

Where it places

BoardPlacingScoreVotes
Overall#371457 Elo38,490
Hard problems#261484 Elo25,135
CodingNot on this board
Agents#116.235,768

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-5.6
Released Jun 26, 2026
✓ OpenAI →
↑ #25 Muse Spark 1.2#27 Qwen 3.8 Flash Next ↓