Claude Opus 4.8 vs GLM 5.1
As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.1 in 6 of 6 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, and Factuality.
Claude Opus 4.8
It used to be. Was SOTA in Coding › Web dev.
GLM 5.1
It used to be. Was SOTA in Reasoning.
| Category | Claude Opus 4.8 | GLM 5.1 |
|---|---|---|
| General LLM | #20 · #20 in General LLM Margin 13.605442176870753 LMArena leaderboard dataset · Oct 13, 2026 | #37 · #37 in General LLM Margin 25.17006802721089 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #10 · #10 in Reasoning Margin 7.534246575342465 LMArena leaderboard dataset · Oct 13, 2026 | #36 · #36 in Reasoning Margin 25.342465753424662 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 | #27 · #27 in Science Margin — Epoch AI benchmarking hub · May 28, 2026 | #35 · #35 in Science Margin — Epoch AI benchmarking hub · Apr 7, 2026 |
| Coding | #12 · #12 in Coding Margin 59.09090909090909 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Apr 7, 2026 |
| Coding › Agentic | #12 · #12 in Coding › Agentic Margin 59.09090909090909 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #33 · Was SOTA · Coding › Web dev Margin 29.90654205607477 LMArena leaderboard dataset · Oct 13, 2026 | #46 · Was SOTA · Coding › Web dev Margin 42.05607476635514 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #10 · Was SOTA · Long context Margin 6.802721088435391 LMArena leaderboard dataset · Oct 13, 2026 | #36 · Was SOTA · Long context Margin 24.48979591836735 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #13 · #13 in Vision Margin 36.842105263157904 Epoch AI benchmarking hub · May 28, 2026 | — |
| Factuality | #21 · #21 in Factuality Margin 16.417910447761187 LMArena leaderboard dataset · Oct 13, 2026 | #38 · #38 in Factuality Margin 29.104477611940297 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #12 · #12 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · May 28, 2026 | — |
Claude Opus 4.8: $10 per 1M blended tokens.
GLM 5.1: $2.0425 per 1M blended tokens.
Claude Opus 4.8: closed weights.
GLM 5.1: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.1 in General LLM at #20 against #37.
Reasoning: As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.1 in Reasoning at #10 against #36.
Science: As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.1 in Science at #27 against #35.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.1 in Coding › Web dev at #33 against #46.
Long context: As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.1 in Long context at #10 against #36.
Factuality: As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.1 in Factuality at #21 against #38.
Claude Opus 4.8 or GLM 5.1?
As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.1 in 6 of 6 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, and Factuality.
Claude Opus 4.8 or GLM 5.1 for General LLM?
As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.1 in General LLM at #20 against #37.
Claude Opus 4.8 or GLM 5.1 for Reasoning?
As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.1 in Reasoning at #10 against #36.
Claude Opus 4.8 or GLM 5.1 for Science?
As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.1 in Science at #27 against #35.