GPT-5.5 vs Grok 4.3
As of Oct 14, 2026, GPT-5.5 leads Grok 4.3 in 7 of 7 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, Vision, and Factuality.
GPT-5.5
It used to be. Was SOTA in General LLM.
Grok 4.3
#32 Best current rank: #32 in Vision, as of Oct 14, 2026.
| Category | GPT-5.5 | Grok 4.3 |
|---|---|---|
| General LLM | #21 · Was SOTA · General LLM Margin 14.285714285714292 LMArena leaderboard dataset · Oct 13, 2026 | #67 · #67 in General LLM Margin 45.57823129251701 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #25 · #25 in Reasoning Margin 17.808219178082197 LMArena leaderboard dataset · Oct 13, 2026 | #75 · #75 in Reasoning Margin 52.054794520547944 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #30 · #30 in Science Margin — Epoch AI benchmarking hub · Apr 23, 2026 | #41 · #41 in Science Margin — Epoch AI benchmarking hub · Apr 17, 2026 |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | #44 · #44 in Coding › Web dev Margin 40.18691588785047 LMArena leaderboard dataset · Oct 13, 2026 | #85 · #85 in Coding › Web dev Margin 78.50467289719626 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #23 · Was SOTA · Long context Margin 15.646258503401356 LMArena leaderboard dataset · Oct 13, 2026 | #77 · #77 in Long context Margin 52.38095238095237 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #10 · Was SOTA · Vision Margin 28.94736842105263 Epoch AI benchmarking hub · Apr 23, 2026 | #32 · #32 in Vision Margin 97.36842105263158 Epoch AI benchmarking hub · Apr 17, 2026 |
| Factuality | #5 · Was SOTA · Factuality Margin 4.477611940298502 LMArena leaderboard dataset · Oct 13, 2026 | #87 · #87 in Factuality Margin 65.67164179104478 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #7 · #7 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 23, 2026 | — |
GPT-5.5: $11.25 per 1M blended tokens.
Grok 4.3: $1.5625000000000002 per 1M blended tokens.
GPT-5.5: closed weights.
Grok 4.3: closed weights.
General LLM: As of Oct 14, 2026, GPT-5.5 leads Grok 4.3 in General LLM at #21 against #67.
Reasoning: As of Oct 14, 2026, GPT-5.5 leads Grok 4.3 in Reasoning at #25 against #75.
Science: As of Oct 14, 2026, GPT-5.5 leads Grok 4.3 in Science at #30 against #41.
Coding › Web dev: As of Oct 14, 2026, GPT-5.5 leads Grok 4.3 in Coding › Web dev at #44 against #85.
Long context: As of Oct 14, 2026, GPT-5.5 leads Grok 4.3 in Long context at #23 against #77.
Vision: As of Oct 14, 2026, GPT-5.5 leads Grok 4.3 in Vision at #10 against #32.
Factuality: As of Oct 14, 2026, GPT-5.5 leads Grok 4.3 in Factuality at #5 against #87.
GPT-5.5 or Grok 4.3?
As of Oct 14, 2026, GPT-5.5 leads Grok 4.3 in 7 of 7 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, Vision, and Factuality.
GPT-5.5 or Grok 4.3 for General LLM?
As of Oct 14, 2026, GPT-5.5 leads Grok 4.3 in General LLM at #21 against #67.
GPT-5.5 or Grok 4.3 for Reasoning?
As of Oct 14, 2026, GPT-5.5 leads Grok 4.3 in Reasoning at #25 against #75.
GPT-5.5 or Grok 4.3 for Science?
As of Oct 14, 2026, GPT-5.5 leads Grok 4.3 in Science at #30 against #41.