Claude Opus 5 vs GLM 5.3
As of Oct 15, 2026, Claude Opus 5 leads GLM 5.3 in 8 of 8 shared categories: General LLM, Reasoning, Science, Coding, Coding › Agentic, Coding › Web dev, Long context, and Factuality.
Claude Opus 5
Close. Near-SOTA in Factuality, rank #4.
GLM 5.3
Yes. Yes on General LLM (open weights); Reasoning (best per dollar). Not the overall leader.
| Category | Claude Opus 5 | GLM 5.3 |
|---|---|---|
| General LLM | #11 · Was SOTA · General LLM Margin 5.851063829787236 LMArena leaderboard dataset · Oct 13, 2026 | #24 · #24 in General LLM Margin 12.765957446808514 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #9 · Was SOTA · Reasoning Margin 5.319148936170208 LMArena leaderboard dataset · Oct 13, 2026 | #19 · #19 in Reasoning Margin 10.63829787234043 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 | #28 · #28 in Science Margin — Epoch AI benchmarking hub · Aug 14, 2026 |
| Coding | #4 · #4 in Coding Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | #7 · #7 in Coding Margin 36.36363636363637 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #4 · #4 in Coding › Agentic Margin 22.727272727272734 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 | #6 · Near-SOTA · Coding › Web dev Margin 4 LMArena leaderboard dataset · Oct 13, 2026 | #20 · #20 in Coding › Web dev Margin 15.200000000000003 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #9 · Was SOTA · Long context Margin 4.7872340425531945 LMArena leaderboard dataset · Oct 13, 2026 | #31 · #31 in Long context Margin 16.489361702127653 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #12 · #12 in Vision Margin 36.8421052631579 Epoch AI benchmarking hub · Jul 24, 2026 | — |
| Factuality | #4 · Near-SOTA · Factuality Margin 2.9069767441860535 LMArena leaderboard dataset · Oct 13, 2026 | #31 · #31 in Factuality Margin 18.604651162790702 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 24, 2026 | — |
Claude Opus 5: $10 per 1M blended tokens.
GLM 5.3: $1.275 per 1M blended tokens.
Claude Opus 5: closed weights.
GLM 5.3: open weights.
General LLM: As of Oct 15, 2026, Claude Opus 5 leads GLM 5.3 in General LLM at #11 against #24.
Reasoning: As of Oct 15, 2026, Claude Opus 5 leads GLM 5.3 in Reasoning at #9 against #19.
Science: As of Oct 15, 2026, Claude Opus 5 leads GLM 5.3 in Science at #12 against #28.
Coding: As of Oct 15, 2026, Claude Opus 5 leads GLM 5.3 in Coding at #4 against #7.
Coding › Agentic: As of Oct 15, 2026, Claude Opus 5 leads GLM 5.3 in Coding › Agentic at #4 against #7.
Coding › Web dev: As of Oct 15, 2026, Claude Opus 5 leads GLM 5.3 in Coding › Web dev at #6 against #20.
Long context: As of Oct 15, 2026, Claude Opus 5 leads GLM 5.3 in Long context at #9 against #31.
Factuality: As of Oct 15, 2026, Claude Opus 5 leads GLM 5.3 in Factuality at #4 against #31.
Claude Opus 5 or GLM 5.3?
As of Oct 15, 2026, Claude Opus 5 leads GLM 5.3 in 8 of 8 shared categories: General LLM, Reasoning, Science, Coding, Coding › Agentic, Coding › Web dev, Long context, and Factuality.
Claude Opus 5 or GLM 5.3 for General LLM?
As of Oct 15, 2026, Claude Opus 5 leads GLM 5.3 in General LLM at #11 against #24.
Claude Opus 5 or GLM 5.3 for Reasoning?
As of Oct 15, 2026, Claude Opus 5 leads GLM 5.3 in Reasoning at #9 against #19.
Claude Opus 5 or GLM 5.3 for Science?
As of Oct 15, 2026, Claude Opus 5 leads GLM 5.3 in Science at #12 against #28.