Claude Opus 4.8 vs GLM 5.3 Flash
As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 Flash in 7 of 10 shared categories: General LLM, Reasoning, Science, Long context, Vision, Factuality, and Abstraction (ARC).
Claude Opus 4.8
It used to be. Was SOTA in Coding › Web dev.
GLM 5.3 Flash
Yes. Yes on Coding (best per dollar); Coding › Agentic (best per dollar). Not the overall leader.
| Category | Claude Opus 4.8 | GLM 5.3 Flash |
|---|---|---|
| General LLM | #20 · #20 in General LLM Margin 13.605442176870753 LMArena leaderboard dataset · Oct 13, 2026 | #30 · #30 in General LLM Margin 20.40816326530613 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #10 · #10 in Reasoning Margin 7.534246575342465 LMArena leaderboard dataset · Oct 13, 2026 | #26 · #26 in Reasoning Margin 18.493150684931507 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 | #34 · #34 in Science Margin — Epoch AI benchmarking hub · Aug 20, 2026 |
| Coding | #12 · #12 in Coding Margin 59.09090909090909 Terminal-Bench Harbor Hub · Oct 6, 2026 | #10 · #10 in Coding Margin 50 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #12 · #12 in Coding › Agentic Margin 59.09090909090909 Terminal-Bench Harbor Hub · Oct 6, 2026 | #10 · #10 in Coding › Agentic Margin 50 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 | #22 · #22 in Coding › Web dev Margin 19.626168224299064 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #10 · Was SOTA · Long context Margin 6.802721088435391 LMArena leaderboard dataset · Oct 13, 2026 | #30 · #30 in Long context Margin 20.40816326530613 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #13 · #13 in Vision Margin 36.842105263157904 Epoch AI benchmarking hub · May 28, 2026 | #29 · #29 in Vision Margin 86.84210526315789 Epoch AI benchmarking hub · Aug 20, 2026 |
| Factuality | #21 · #21 in Factuality Margin 16.417910447761187 LMArena leaderboard dataset · Oct 13, 2026 | #30 · #30 in Factuality Margin 23.13432835820896 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #12 · #12 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · May 28, 2026 | #14 · #14 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Aug 20, 2026 |
Claude Opus 4.8: $10 per 1M blended tokens.
GLM 5.3 Flash: $0.252 per 1M blended tokens.
Claude Opus 4.8: closed weights.
GLM 5.3 Flash: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 Flash in General LLM at #20 against #30.
Reasoning: As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 Flash in Reasoning at #10 against #26.
Science: As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 Flash in Science at #27 against #34.
Coding: As of Oct 14, 2026, GLM 5.3 Flash leads Claude Opus 4.8 in Coding at #10 against #12.
Coding › Agentic: As of Oct 14, 2026, GLM 5.3 Flash leads Claude Opus 4.8 in Coding › Agentic at #10 against #12.
Coding › Web dev: As of Oct 14, 2026, GLM 5.3 Flash leads Claude Opus 4.8 in Coding › Web dev at #22 against #33.
Long context: As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 Flash in Long context at #10 against #30.
Vision: As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 Flash in Vision at #13 against #29.
Factuality: As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 Flash in Factuality at #21 against #30.
Abstraction (ARC): As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 Flash in Abstraction (ARC) at #12 against #14.
Claude Opus 4.8 · GLM 5.3 Flash
Claude Opus 4.8 or GLM 5.3 Flash?
As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 Flash in 7 of 10 shared categories: General LLM, Reasoning, Science, Long context, Vision, Factuality, and Abstraction (ARC).
Claude Opus 4.8 or GLM 5.3 Flash for General LLM?
As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 Flash in General LLM at #20 against #30.
Claude Opus 4.8 or GLM 5.3 Flash for Reasoning?
As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 Flash in Reasoning at #10 against #26.
Claude Opus 4.8 or GLM 5.3 Flash for Science?
As of Oct 14, 2026, Claude Opus 4.8 leads GLM 5.3 Flash in Science at #27 against #34.