GLM 5.3 Flash vs GPT-5.6 Luna
As of Oct 14, 2026, GLM 5.3 Flash leads GPT-5.6 Luna in 8 of 10 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).
GLM 5.3 Flash
Yes. Yes on Coding (best per dollar); Coding › Agentic (best per dollar). Not the overall leader.
GPT-5.6 Luna
#16 Best current rank: #16 in Coding, as of Oct 14, 2026.
| Category | GLM 5.3 Flash | GPT-5.6 Luna |
|---|---|---|
| General LLM | #30 · #30 in General LLM Margin 20.40816326530613 LMArena leaderboard dataset · Oct 13, 2026 | #53 · #53 in General LLM Margin 36.054421768707485 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #26 · #26 in Reasoning Margin 18.493150684931507 LMArena leaderboard dataset · Oct 13, 2026 | #55 · #55 in Reasoning Margin 38.35616438356164 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 | #25 · #25 in Science Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
| Coding | #10 · #10 in Coding Margin 50 Terminal-Bench Harbor Hub · Oct 6, 2026 | #16 · #16 in Coding Margin 77.27272727272728 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #10 · #10 in Coding › Agentic Margin 50 Terminal-Bench Harbor Hub · Oct 6, 2026 | #16 · #16 in Coding › Agentic Margin 77.27272727272728 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 | #43 · #43 in Coding › Web dev Margin 39.25233644859813 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #30 · #30 in Long context Margin 20.40816326530613 LMArena leaderboard dataset · Oct 13, 2026 | #65 · #65 in Long context Margin 44.21768707482993 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #29 · #29 in Vision Margin 86.84210526315789 Epoch AI benchmarking hub · Aug 20, 2026 | #19 · #19 in Vision Margin 52.63157894736842 Epoch AI benchmarking hub · Jul 9, 2026 |
| Factuality | #30 · #30 in Factuality Margin 23.13432835820896 LMArena leaderboard dataset · Oct 13, 2026 | #35 · #35 in Factuality Margin 26.86567164179104 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #14 · #14 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Aug 20, 2026 | #19 · #19 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
GLM 5.3 Flash: $0.2375 per 1M blended tokens.
GPT-5.6 Luna: $0.44999999999999996 per 1M blended tokens.
GLM 5.3 Flash: open weights.
GPT-5.6 Luna: closed weights.
General LLM: As of Oct 14, 2026, GLM 5.3 Flash leads GPT-5.6 Luna in General LLM at #30 against #53.
Reasoning: As of Oct 14, 2026, GLM 5.3 Flash leads GPT-5.6 Luna in Reasoning at #26 against #55.
Science: As of Oct 14, 2026, GPT-5.6 Luna leads GLM 5.3 Flash in Science at #25 against #34.
Coding: As of Oct 14, 2026, GLM 5.3 Flash leads GPT-5.6 Luna in Coding at #10 against #16.
Coding › Agentic: As of Oct 14, 2026, GLM 5.3 Flash leads GPT-5.6 Luna in Coding › Agentic at #10 against #16.
Coding › Web dev: As of Oct 14, 2026, GLM 5.3 Flash leads GPT-5.6 Luna in Coding › Web dev at #22 against #43.
Long context: As of Oct 14, 2026, GLM 5.3 Flash leads GPT-5.6 Luna in Long context at #30 against #65.
Vision: As of Oct 14, 2026, GPT-5.6 Luna leads GLM 5.3 Flash in Vision at #19 against #29.
Factuality: As of Oct 14, 2026, GLM 5.3 Flash leads GPT-5.6 Luna in Factuality at #30 against #35.
Abstraction (ARC): As of Oct 14, 2026, GLM 5.3 Flash leads GPT-5.6 Luna in Abstraction (ARC) at #14 against #19.
GLM 5.3 Flash or GPT-5.6 Luna?
As of Oct 14, 2026, GLM 5.3 Flash leads GPT-5.6 Luna in 8 of 10 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).
GLM 5.3 Flash or GPT-5.6 Luna for General LLM?
As of Oct 14, 2026, GLM 5.3 Flash leads GPT-5.6 Luna in General LLM at #30 against #53.
GLM 5.3 Flash or GPT-5.6 Luna for Reasoning?
As of Oct 14, 2026, GLM 5.3 Flash leads GPT-5.6 Luna in Reasoning at #26 against #55.
GLM 5.3 Flash or GPT-5.6 Luna for Science?
As of Oct 14, 2026, GPT-5.6 Luna leads GLM 5.3 Flash in Science at #25 against #34.