Claude Opus 4.8 vs GLM 5.3
As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 in 5 of 8 shared categories: General LLM, Reasoning, Science, Long context, and Factuality.
Claude Opus 4.8
It used to be. Was SOTA in Coding › Web dev.
GLM 5.3
Yes. Yes on General LLM (open weights); Reasoning (best per dollar). Not the overall leader.
| Category | Claude Opus 4.8 | GLM 5.3 |
|---|---|---|
| General LLM | #20 · #20 in General LLM Margin 13.605442176870753 LMArena leaderboard dataset · Oct 13, 2026 | #23 · #23 in General LLM Margin 15.646258503401356 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #10 · #10 in Reasoning Margin 7.534246575342465 LMArena leaderboard dataset · Oct 13, 2026 | #19 · #19 in Reasoning Margin 13.698630136986296 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 | #28 · #28 in Science Margin — Epoch AI benchmarking hub · Aug 14, 2026 |
| Coding | #12 · #12 in Coding Margin 59.09090909090909 Terminal-Bench Harbor Hub · Oct 6, 2026 | #7 · #7 in Coding Margin 36.36363636363637 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #12 · #12 in Coding › Agentic Margin 59.09090909090909 Terminal-Bench Harbor Hub · Oct 6, 2026 | #7 · #7 in Coding › Agentic Margin 36.36363636363637 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 | #18 · #18 in Coding › Web dev Margin 15.887850467289724 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #10 · Was SOTA · Long context Margin 6.802721088435391 LMArena leaderboard dataset · Oct 13, 2026 | #27 · #27 in Long context Margin 18.367346938775512 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 | #27 · #27 in Factuality Margin 20.895522388059703 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 5.3: $1.2592499999999998 per 1M blended tokens.
Claude Opus 4.8: closed weights.
GLM 5.3: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 in General LLM at #20 against #23.
Reasoning: As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 in Reasoning at #10 against #19.
Science: As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 in Science at #27 against #28.
Coding: As of Oct 14, 2026, GLM 5.3 leads Claude Opus 4.8 in Coding at #7 against #12.
Coding › Agentic: As of Oct 14, 2026, GLM 5.3 leads Claude Opus 4.8 in Coding › Agentic at #7 against #12.
Coding › Web dev: As of Oct 14, 2026, GLM 5.3 leads Claude Opus 4.8 in Coding › Web dev at #18 against #33.
Long context: As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 in Long context at #10 against #27.
Factuality: As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 in Factuality at #21 against #27.
Claude Opus 4.8 or GLM 5.3?
As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 in 5 of 8 shared categories: General LLM, Reasoning, Science, Long context, and Factuality.
Claude Opus 4.8 or GLM 5.3 for General LLM?
As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 in General LLM at #20 against #23.
Claude Opus 4.8 or GLM 5.3 for Reasoning?
As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 in Reasoning at #10 against #19.
Claude Opus 4.8 or GLM 5.3 for Science?
As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 in Science at #27 against #28.