Claude Sonnet 5.5 vs Grok 4.3
As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.3 in 7 of 7 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, Vision, and Factuality.
Claude Sonnet 5.5
Yes. SOTA in co-SOTA in Coding, co-SOTA in Coding › Agentic and co-SOTA in Vision.
Grok 4.3
#32 Best current rank: #32 in Vision, as of Oct 14, 2026.
| Category | Claude Sonnet 5.5 | Grok 4.3 |
|---|---|---|
| General LLM | #27 · #27 in General LLM Margin 18.367346938775512 LMArena leaderboard dataset · Oct 13, 2026 | #67 · #67 in General LLM Margin 45.57823129251701 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #18 · #18 in Reasoning Margin 13.013698630136986 LMArena leaderboard dataset · Oct 13, 2026 | #75 · #75 in Reasoning Margin 52.054794520547944 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #4 · #4 in Math Margin 6.666666666666671 Epoch AI benchmarking hub · Sep 28, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #3 · #3 in Science Margin — Epoch AI benchmarking hub · Sep 28, 2026 | #41 · #41 in Science Margin — Epoch AI benchmarking hub · Apr 17, 2026 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #3 · Near-SOTA · Coding › Web dev Margin 1.8691588785046775 LMArena leaderboard dataset · Oct 13, 2026 | #85 · #85 in Coding › Web dev Margin 78.50467289719626 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #11 · #11 in Long context Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #77 · #77 in Long context Margin 52.38095238095237 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 28, 2026 | #32 · #32 in Vision Margin 97.36842105263158 Epoch AI benchmarking hub · Apr 17, 2026 |
| Factuality | #16 · #16 in Factuality Margin 12.68656716417911 LMArena leaderboard dataset · Oct 13, 2026 | #87 · #87 in Factuality Margin 65.67164179104478 LMArena leaderboard dataset · Oct 13, 2026 |
Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.
Grok 4.3: $1.5625000000000002 per 1M blended tokens.
Claude Sonnet 5.5: closed weights.
Grok 4.3: closed weights.
General LLM: As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.3 in General LLM at #27 against #67.
Reasoning: As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.3 in Reasoning at #18 against #75.
Science: As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.3 in Science at #3 against #41.
Coding › Web dev: As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.3 in Coding › Web dev at #3 against #85.
Long context: As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.3 in Long context at #11 against #77.
Vision: As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.3 in Vision at #1 against #32.
Factuality: As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.3 in Factuality at #16 against #87.
Claude Sonnet 5.5 or Grok 4.3?
As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.3 in 7 of 7 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, Vision, and Factuality.
Claude Sonnet 5.5 or Grok 4.3 for General LLM?
As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.3 in General LLM at #27 against #67.
Claude Sonnet 5.5 or Grok 4.3 for Reasoning?
As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.3 in Reasoning at #18 against #75.
Claude Sonnet 5.5 or Grok 4.3 for Science?
As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.3 in Science at #3 against #41.