Claude Sonnet 5.5 vs Grok 4.5
As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.5 in 9 of 9 shared categories: General LLM, Reasoning, Science, Coding, Coding › Agentic, 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 4.5
#14 Best recorded rank: #14 in Science, as of Oct 14, 2026.
| Category | Claude Sonnet 5.5 | Grok 4.5 |
|---|---|---|
| General LLM | #27 · #27 in General LLM Margin 18.367346938775512 LMArena leaderboard dataset · Oct 13, 2026 | #36 · #36 in General LLM Margin 24.48979591836735 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #18 · #18 in Reasoning Margin 13.013698630136986 LMArena leaderboard dataset · Oct 13, 2026 | #37 · #37 in Reasoning Margin 26.027397260273972 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 | #14 · #14 in Science Margin — Epoch AI benchmarking hub · Jul 8, 2026 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #19 · #19 in Coding Margin 95.45454545454545 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #19 · #19 in Coding › Agentic Margin 95.45454545454545 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 | #34 · #34 in Coding › Web dev Margin 30.8411214953271 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #11 · #11 in Long context Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #35 · #35 in Long context Margin 23.80952380952381 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 28, 2026 | #29 · #29 in Vision Margin 86.84210526315789 Epoch AI benchmarking hub · Jul 8, 2026 |
| Factuality | #16 · #16 in Factuality Margin 12.68656716417911 LMArena leaderboard dataset · Oct 13, 2026 | #26 · #26 in Factuality Margin 20.14925373134328 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #21 · #21 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 8, 2026 |
Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.
Grok 4.5: $3 per 1M blended tokens.
Claude Sonnet 5.5: closed weights.
Grok 4.5: closed weights.
General LLM: As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.5 in General LLM at #27 against #36.
Reasoning: As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.5 in Reasoning at #18 against #37.
Science: As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.5 in Science at #3 against #14.
Coding: As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.5 in Coding at #1 against #19.
Coding › Agentic: As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.5 in Coding › Agentic at #1 against #19.
Coding › Web dev: As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.5 in Coding › Web dev at #3 against #34.
Long context: As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.5 in Long context at #11 against #35.
Vision: As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.5 in Vision at #1 against #29.
Factuality: As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.5 in Factuality at #16 against #26.
Claude Sonnet 5.5 or Grok 4.5?
As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.5 in 9 of 9 shared categories: General LLM, Reasoning, Science, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, and Factuality.
Claude Sonnet 5.5 or Grok 4.5 for General LLM?
As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.5 in General LLM at #27 against #36.
Claude Sonnet 5.5 or Grok 4.5 for Reasoning?
As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.5 in Reasoning at #18 against #37.
Claude Sonnet 5.5 or Grok 4.5 for Science?
As of Oct 14, 2026, Claude Sonnet 5.5 leads Grok 4.5 in Science at #3 against #14.