Grok 4.5 vs O3 Mini
As of Oct 14, 2026, Grok 4.5 leads O3 Mini in 4 of 5 shared categories: Reasoning, Science, Long context, and Abstraction (ARC).
Grok 4.5
#14 Best recorded rank: #14 in Science, as of Oct 14, 2026.
O3 Mini
It used to be. Was SOTA in Reasoning.
| Category | Grok 4.5 | O3 Mini |
|---|---|---|
| General LLM | #36 · #36 in General LLM Margin 24.48979591836735 LMArena leaderboard dataset · Oct 13, 2026 | #7 · #7 in General LLM Margin — LMArena leaderboard dataset · Apr 16, 2025 |
| Reasoning | #37 · #37 in Reasoning Margin 26.027397260273972 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 | #14 · #14 in Science Margin — Epoch AI benchmarking hub · Jul 8, 2026 | #76 · #76 in Science Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Coding | #19 · #19 in Coding Margin 95.45454545454545 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #19 · #19 in Coding › Agentic Margin 95.45454545454545 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #34 · #34 in Coding › Web dev Margin 30.8411214953271 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #35 · #35 in Long context Margin 23.80952380952381 LMArena leaderboard dataset · Oct 13, 2026 | #145 · #145 in Long context Margin 98.63945578231292 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #29 · #29 in Vision Margin 86.84210526315789 Epoch AI benchmarking hub · Jul 8, 2026 | — |
| Factuality | #26 · #26 in Factuality Margin 20.14925373134328 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Abstraction (ARC) | #21 · #21 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 8, 2026 | #51 · #51 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
Grok 4.5: $3 per 1M blended tokens.
O3 Mini: $1.9250000000000003 per 1M blended tokens.
Grok 4.5: closed weights.
O3 Mini: closed weights.
General LLM: As of Oct 14, 2026, O3 Mini leads Grok 4.5 in General LLM at #7 against #36.
Reasoning: As of Oct 14, 2026, Grok 4.5 leads O3 Mini in Reasoning at #37 against #133.
Science: As of Oct 14, 2026, Grok 4.5 leads O3 Mini in Science at #14 against #76.
Long context: As of Oct 14, 2026, Grok 4.5 leads O3 Mini in Long context at #35 against #145.
Abstraction (ARC): As of Oct 14, 2026, Grok 4.5 leads O3 Mini in Abstraction (ARC) at #21 against #51.
Grok 4.5 or O3 Mini?
As of Oct 14, 2026, Grok 4.5 leads O3 Mini in 4 of 5 shared categories: Reasoning, Science, Long context, and Abstraction (ARC).
Grok 4.5 or O3 Mini for General LLM?
As of Oct 14, 2026, O3 Mini leads Grok 4.5 in General LLM at #7 against #36.
Grok 4.5 or O3 Mini for Reasoning?
As of Oct 14, 2026, Grok 4.5 leads O3 Mini in Reasoning at #37 against #133.
Grok 4.5 or O3 Mini for Science?
As of Oct 14, 2026, Grok 4.5 leads O3 Mini in Science at #14 against #76.