Grok 4.3 vs O3 Mini
As of Oct 14, 2026, Grok 4.3 leads O3 Mini in 3 of 4 shared categories: Reasoning, Science, and Long context.
Grok 4.3
#32 Best current rank: #32 in Vision, as of Oct 14, 2026.
O3 Mini
It used to be. Was SOTA in Reasoning.
| Category | Grok 4.3 | O3 Mini |
|---|---|---|
| General LLM | #67 · #67 in General LLM Margin 45.57823129251701 LMArena leaderboard dataset · Oct 13, 2026 | #7 · #7 in General LLM Margin — LMArena leaderboard dataset · Apr 16, 2025 |
| Reasoning | #75 · #75 in Reasoning Margin 52.054794520547944 LMArena leaderboard dataset · Oct 13, 2026 | #133 · Was SOTA · Reasoning Margin 91.78082191780823 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 | #41 · #41 in Science Margin — Epoch AI benchmarking hub · Apr 17, 2026 | #76 · #76 in Science Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | #85 · #85 in Coding › Web dev Margin 78.50467289719626 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #77 · #77 in Long context Margin 52.38095238095237 LMArena leaderboard dataset · Oct 13, 2026 | #145 · #145 in Long context Margin 98.63945578231292 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #32 · #32 in Vision Margin 97.36842105263158 Epoch AI benchmarking hub · Apr 17, 2026 | — |
| Factuality | #87 · #87 in Factuality Margin 65.67164179104478 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Abstraction (ARC) | — | #51 · #51 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
Grok 4.3: $1.5625000000000002 per 1M blended tokens.
O3 Mini: $1.9250000000000003 per 1M blended tokens.
Grok 4.3: closed weights.
O3 Mini: closed weights.
General LLM: As of Oct 14, 2026, O3 Mini leads Grok 4.3 in General LLM at #7 against #67.
Reasoning: As of Oct 14, 2026, Grok 4.3 leads O3 Mini in Reasoning at #75 against #133.
Science: As of Oct 14, 2026, Grok 4.3 leads O3 Mini in Science at #41 against #76.
Long context: As of Oct 14, 2026, Grok 4.3 leads O3 Mini in Long context at #77 against #145.
Grok 4.3 or O3 Mini?
As of Oct 14, 2026, Grok 4.3 leads O3 Mini in 3 of 4 shared categories: Reasoning, Science, and Long context.
Grok 4.3 or O3 Mini for General LLM?
As of Oct 14, 2026, O3 Mini leads Grok 4.3 in General LLM at #7 against #67.
Grok 4.3 or O3 Mini for Reasoning?
As of Oct 14, 2026, Grok 4.3 leads O3 Mini in Reasoning at #75 against #133.
Grok 4.3 or O3 Mini for Science?
As of Oct 14, 2026, Grok 4.3 leads O3 Mini in Science at #41 against #76.