GLM 5.3 Flash vs GPT-5.5
As of Oct 14, 2026, GLM 5.3 Flash leads GPT-5.5 in 1 of 8 shared categories: Coding › Web dev.
GLM 5.3 Flash
Yes. Yes on Coding (best per dollar); Coding › Agentic (best per dollar). Not the overall leader.
GPT-5.5
It used to be. Was SOTA in General LLM.
| Category | GLM 5.3 Flash | GPT-5.5 |
|---|---|---|
| General LLM | #30 · #30 in General LLM Margin 20.40816326530613 LMArena leaderboard dataset · Oct 13, 2026 | #21 · Was SOTA · General LLM Margin 14.285714285714292 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #26 · #26 in Reasoning Margin 18.493150684931507 LMArena leaderboard dataset · Oct 13, 2026 | #25 · #25 in Reasoning Margin 17.808219178082197 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 | #34 · #34 in Science Margin — Epoch AI benchmarking hub · Aug 20, 2026 | #30 · #30 in Science Margin — Epoch AI benchmarking hub · Apr 23, 2026 |
| Coding | #10 · #10 in Coding Margin 50 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #10 · #10 in Coding › Agentic Margin 50 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #22 · #22 in Coding › Web dev Margin 19.626168224299064 LMArena leaderboard dataset · Oct 13, 2026 | #44 · #44 in Coding › Web dev Margin 40.18691588785047 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #30 · #30 in Long context Margin 20.40816326530613 LMArena leaderboard dataset · Oct 13, 2026 | #23 · Was SOTA · Long context Margin 15.646258503401356 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #29 · #29 in Vision Margin 86.84210526315789 Epoch AI benchmarking hub · Aug 20, 2026 | #10 · Was SOTA · Vision Margin 28.94736842105263 Epoch AI benchmarking hub · Apr 23, 2026 |
| Factuality | #30 · #30 in Factuality Margin 23.13432835820896 LMArena leaderboard dataset · Oct 13, 2026 | #5 · Was SOTA · Factuality Margin 4.477611940298502 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #14 · #14 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Aug 20, 2026 | #7 · #7 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 23, 2026 |
GLM 5.3 Flash: $0.2375 per 1M blended tokens.
GPT-5.5: $11.25 per 1M blended tokens.
GLM 5.3 Flash: open weights.
GPT-5.5: closed weights.
General LLM: As of Oct 14, 2026, GPT-5.5 leads GLM 5.3 Flash in General LLM at #21 against #30.
Reasoning: As of Oct 14, 2026, GPT-5.5 leads GLM 5.3 Flash in Reasoning at #25 against #26.
Science: As of Oct 14, 2026, GPT-5.5 leads GLM 5.3 Flash in Science at #30 against #34.
Coding › Web dev: As of Oct 14, 2026, GLM 5.3 Flash leads GPT-5.5 in Coding › Web dev at #22 against #44.
Long context: As of Oct 14, 2026, GPT-5.5 leads GLM 5.3 Flash in Long context at #23 against #30.
Vision: As of Oct 14, 2026, GPT-5.5 leads GLM 5.3 Flash in Vision at #10 against #29.
Factuality: As of Oct 14, 2026, GPT-5.5 leads GLM 5.3 Flash in Factuality at #5 against #30.
Abstraction (ARC): As of Oct 14, 2026, GPT-5.5 leads GLM 5.3 Flash in Abstraction (ARC) at #7 against #14.
GLM 5.3 Flash or GPT-5.5?
As of Oct 14, 2026, GLM 5.3 Flash leads GPT-5.5 in 1 of 8 shared categories: Coding › Web dev.
GLM 5.3 Flash or GPT-5.5 for General LLM?
As of Oct 14, 2026, GPT-5.5 leads GLM 5.3 Flash in General LLM at #21 against #30.
GLM 5.3 Flash or GPT-5.5 for Reasoning?
As of Oct 14, 2026, GPT-5.5 leads GLM 5.3 Flash in Reasoning at #25 against #26.
GLM 5.3 Flash or GPT-5.5 for Science?
As of Oct 14, 2026, GPT-5.5 leads GLM 5.3 Flash in Science at #30 against #34.