Claude Sonnet 5.5 vs GLM 5.1
As of Oct 14, 2026, Claude Sonnet 5.5 leads GLM 5.1 in 6 of 6 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, and Factuality.
Claude Sonnet 5.5
Yes. SOTA in co-SOTA in Coding, co-SOTA in Coding › Agentic and co-SOTA in Vision.
GLM 5.1
It used to be. Was SOTA in Reasoning.
| Category | Claude Sonnet 5.5 | GLM 5.1 |
|---|---|---|
| General LLM | #27 · #27 in General LLM Margin 18.367346938775512 LMArena leaderboard dataset · Oct 13, 2026 | #37 · #37 in General LLM Margin 25.17006802721089 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #18 · #18 in Reasoning Margin 13.013698630136986 LMArena leaderboard dataset · Oct 13, 2026 | #36 · #36 in Reasoning Margin 25.342465753424662 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 | #35 · #35 in Science Margin — Epoch AI benchmarking hub · Apr 7, 2026 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Apr 7, 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 | #46 · Was SOTA · Coding › Web dev Margin 42.05607476635514 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #11 · #11 in Long context Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #36 · Was SOTA · Long context Margin 24.48979591836735 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 28, 2026 | — |
| Factuality | #16 · #16 in Factuality Margin 12.68656716417911 LMArena leaderboard dataset · Oct 13, 2026 | #38 · #38 in Factuality Margin 29.104477611940297 LMArena leaderboard dataset · Oct 13, 2026 |
Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.
GLM 5.1: $2.0425 per 1M blended tokens.
Claude Sonnet 5.5: closed weights.
GLM 5.1: open weights.
General LLM: As of Oct 14, 2026, Claude Sonnet 5.5 leads GLM 5.1 in General LLM at #27 against #37.
Reasoning: As of Oct 14, 2026, Claude Sonnet 5.5 leads GLM 5.1 in Reasoning at #18 against #36.
Science: As of Oct 14, 2026, Claude Sonnet 5.5 leads GLM 5.1 in Science at #3 against #35.
Coding › Web dev: As of Oct 14, 2026, Claude Sonnet 5.5 leads GLM 5.1 in Coding › Web dev at #3 against #46.
Long context: As of Oct 14, 2026, Claude Sonnet 5.5 leads GLM 5.1 in Long context at #11 against #36.
Factuality: As of Oct 14, 2026, Claude Sonnet 5.5 leads GLM 5.1 in Factuality at #16 against #38.
Claude Sonnet 5.5 or GLM 5.1?
As of Oct 14, 2026, Claude Sonnet 5.5 leads GLM 5.1 in 6 of 6 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, and Factuality.
Claude Sonnet 5.5 or GLM 5.1 for General LLM?
As of Oct 14, 2026, Claude Sonnet 5.5 leads GLM 5.1 in General LLM at #27 against #37.
Claude Sonnet 5.5 or GLM 5.1 for Reasoning?
As of Oct 14, 2026, Claude Sonnet 5.5 leads GLM 5.1 in Reasoning at #18 against #36.
Claude Sonnet 5.5 or GLM 5.1 for Science?
As of Oct 14, 2026, Claude Sonnet 5.5 leads GLM 5.1 in Science at #3 against #35.