Claude Opus 5 vs GLM 5.3 Flash
As of Oct 14, 2026, Claude Opus 5 leads GLM 5.3 Flash in 10 of 10 shared categories: General LLM, Reasoning, Science, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, Factuality, and Abstraction (ARC).
Claude Opus 5
Close. Near-SOTA in Factuality, rank #4.
GLM 5.3 Flash
Yes. Yes on Coding (best per dollar); Coding › Agentic (best per dollar). Not the overall leader.
| Category | Claude Opus 5 | GLM 5.3 Flash |
|---|---|---|
| General LLM | #11 · Was SOTA · General LLM Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #30 · #30 in General LLM Margin 20.40816326530613 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #9 · Was SOTA · Reasoning Margin 6.849315068493155 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 | #12 · #12 in Science Margin — Epoch AI benchmarking hub · Jul 24, 2026 | #34 · #34 in Science Margin — Epoch AI benchmarking hub · Aug 20, 2026 |
| Coding | #4 · #4 in Coding Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | #10 · #10 in Coding Margin 50 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #4 · #4 in Coding › Agentic Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | #10 · #10 in Coding › Agentic Margin 50 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Web dev | #6 · Was SOTA · Coding › Web dev Margin 4.672897196261687 LMArena leaderboard dataset · Oct 13, 2026 | #22 · #22 in Coding › Web dev Margin 19.626168224299064 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #9 · Was SOTA · Long context Margin 6.122448979591837 LMArena leaderboard dataset · Oct 13, 2026 | #30 · #30 in Long context Margin 20.40816326530613 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #12 · #12 in Vision Margin 36.8421052631579 Epoch AI benchmarking hub · Jul 24, 2026 | #29 · #29 in Vision Margin 86.84210526315789 Epoch AI benchmarking hub · Aug 20, 2026 |
| Factuality | #4 · Near-SOTA · Factuality Margin 3.731343283582092 LMArena leaderboard dataset · Oct 13, 2026 | #30 · #30 in Factuality Margin 23.13432835820896 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 24, 2026 | #14 · #14 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Aug 20, 2026 |
Claude Opus 5: $10 per 1M blended tokens.
GLM 5.3 Flash: $0.2375 per 1M blended tokens.
Claude Opus 5: closed weights.
GLM 5.3 Flash: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 5 leads GLM 5.3 Flash in General LLM at #11 against #30.
Reasoning: As of Oct 14, 2026, Claude Opus 5 leads GLM 5.3 Flash in Reasoning at #9 against #26.
Science: As of Oct 14, 2026, Claude Opus 5 leads GLM 5.3 Flash in Science at #12 against #34.
Coding: As of Oct 14, 2026, Claude Opus 5 leads GLM 5.3 Flash in Coding at #4 against #10.
Coding › Agentic: As of Oct 14, 2026, Claude Opus 5 leads GLM 5.3 Flash in Coding › Agentic at #4 against #10.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 5 leads GLM 5.3 Flash in Coding › Web dev at #6 against #22.
Long context: As of Oct 14, 2026, Claude Opus 5 leads GLM 5.3 Flash in Long context at #9 against #30.
Vision: As of Oct 14, 2026, Claude Opus 5 leads GLM 5.3 Flash in Vision at #12 against #29.
Factuality: As of Oct 14, 2026, Claude Opus 5 leads GLM 5.3 Flash in Factuality at #4 against #30.
Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5 leads GLM 5.3 Flash in Abstraction (ARC) at #3 against #14.
Claude Opus 5 or GLM 5.3 Flash?
As of Oct 14, 2026, Claude Opus 5 leads GLM 5.3 Flash in 10 of 10 shared categories: General LLM, Reasoning, Science, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, Factuality, and Abstraction (ARC).
Claude Opus 5 or GLM 5.3 Flash for General LLM?
As of Oct 14, 2026, Claude Opus 5 leads GLM 5.3 Flash in General LLM at #11 against #30.
Claude Opus 5 or GLM 5.3 Flash for Reasoning?
As of Oct 14, 2026, Claude Opus 5 leads GLM 5.3 Flash in Reasoning at #9 against #26.
Claude Opus 5 or GLM 5.3 Flash for Science?
As of Oct 14, 2026, Claude Opus 5 leads GLM 5.3 Flash in Science at #12 against #34.