Claude Opus 4.6 vs GLM 5.3 Flash
As of Oct 14, 2026, Claude Opus 4.6 leads GLM 5.3 Flash in 5 of 6 shared categories: General LLM, Reasoning, Science, Long context, and Factuality.
Claude Opus 4.6
Close. Near-SOTA in Reasoning, rank #2.
GLM 5.3 Flash
Yes. Yes on Reasoning (best per dollar); Coding (best per dollar). Not the overall leader.
| Category | Claude Opus 4.6 | GLM 5.3 Flash |
|---|---|---|
| General LLM | #4 · Near-SOTA · General LLM Margin 2.7210884353741562 LMArena leaderboard dataset · Oct 13, 2026 | #30 · #30 in General LLM Margin 20.40816326530613 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #2 · Near-SOTA · Reasoning Margin 2.0547945205479436 LMArena leaderboard dataset · Oct 13, 2026 | #26 · #26 in Reasoning Margin 18.493150684931507 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #11 · #11 in Math Margin 22.22222222222223 Epoch AI benchmarking hub · Feb 5, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Feb 5, 2026 | #34 · #34 in Science Margin — Epoch AI benchmarking hub · Aug 20, 2026 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Feb 5, 2026 | #10 · #10 in Coding Margin 50 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | — | #10 · #10 in Coding › Agentic Margin 50 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Web dev | #35 · Was SOTA · Coding › Web dev Margin 31.775700934579433 LMArena leaderboard dataset · Oct 13, 2026 | #22 · #22 in Coding › Web dev Margin 19.626168224299064 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #2 · Near-SOTA · Long context Margin 0.6802721088435391 LMArena leaderboard dataset · Oct 13, 2026 | #30 · #30 in Long context Margin 20.40816326530613 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | #29 · #29 in Vision Margin 86.84210526315789 Epoch AI benchmarking hub · Aug 20, 2026 |
| Factuality | #3 · Near-SOTA · Factuality Margin 2.9850746268656536 LMArena leaderboard dataset · Oct 13, 2026 | #30 · #30 in Factuality Margin 23.13432835820896 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #14 · #14 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Aug 20, 2026 |
Claude Opus 4.6: $10 per 1M blended tokens.
GLM 5.3 Flash: $0.2375 per 1M blended tokens.
Claude Opus 4.6: closed weights.
GLM 5.3 Flash: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.6 leads GLM 5.3 Flash in General LLM at #4 against #30.
Reasoning: As of Oct 14, 2026, Claude Opus 4.6 leads GLM 5.3 Flash in Reasoning at #2 against #26.
Science: As of Oct 14, 2026, Claude Opus 4.6 leads GLM 5.3 Flash in Science at #32 against #34.
Coding › Web dev: As of Oct 14, 2026, GLM 5.3 Flash leads Claude Opus 4.6 in Coding › Web dev at #22 against #35.
Long context: As of Oct 14, 2026, Claude Opus 4.6 leads GLM 5.3 Flash in Long context at #2 against #30.
Factuality: As of Oct 14, 2026, Claude Opus 4.6 leads GLM 5.3 Flash in Factuality at #3 against #30.
Claude Opus 4.6 · GLM 5.3 Flash
Claude Opus 4.6 or GLM 5.3 Flash?
As of Oct 14, 2026, Claude Opus 4.6 leads GLM 5.3 Flash in 5 of 6 shared categories: General LLM, Reasoning, Science, Long context, and Factuality.
Claude Opus 4.6 or GLM 5.3 Flash for General LLM?
As of Oct 14, 2026, Claude Opus 4.6 leads GLM 5.3 Flash in General LLM at #4 against #30.
Claude Opus 4.6 or GLM 5.3 Flash for Reasoning?
As of Oct 14, 2026, Claude Opus 4.6 leads GLM 5.3 Flash in Reasoning at #2 against #26.
Claude Opus 4.6 or GLM 5.3 Flash for Science?
As of Oct 14, 2026, Claude Opus 4.6 leads GLM 5.3 Flash in Science at #32 against #34.