GPT-5.5 vs Muse Glimmer
As of Oct 14, 2026, GPT-5.5 leads Muse Glimmer in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
GPT-5.5
It used to be. Was SOTA in General LLM.
Muse Glimmer
#82 Best current rank: #82 in Reasoning, as of Oct 14, 2026.
| Category | GPT-5.5 | Muse Glimmer |
|---|---|---|
| General LLM | #21 · Was SOTA · General LLM Margin 14.285714285714292 LMArena leaderboard dataset · Oct 13, 2026 | #86 · #86 in General LLM Margin 58.50340136054422 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #25 · #25 in Reasoning Margin 17.808219178082197 LMArena leaderboard dataset · Oct 13, 2026 | #82 · #82 in Reasoning Margin 56.84931506849315 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | — |
| Science | #30 · #30 in Science Margin — Epoch AI benchmarking hub · Apr 23, 2026 | — |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | #44 · #44 in Coding › Web dev Margin 40.18691588785047 LMArena leaderboard dataset · Oct 13, 2026 | #86 · #86 in Coding › Web dev Margin 79.43925233644859 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #23 · Was SOTA · Long context Margin 15.646258503401356 LMArena leaderboard dataset · Oct 13, 2026 | #97 · #97 in Long context Margin 65.98639455782313 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #10 · Was SOTA · Vision Margin 28.94736842105263 Epoch AI benchmarking hub · Apr 23, 2026 | — |
| Factuality | #5 · Was SOTA · Factuality Margin 4.477611940298502 LMArena leaderboard dataset · Oct 13, 2026 | #107 · #107 in Factuality Margin 80.59701492537313 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #7 · #7 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 23, 2026 | — |
GPT-5.5: $11.25 per 1M blended tokens.
Muse Glimmer: price per 1M tokens is unset in the catalog.
GPT-5.5: closed weights.
Muse Glimmer: open weights.
General LLM: As of Oct 14, 2026, GPT-5.5 leads Muse Glimmer in General LLM at #21 against #86.
Reasoning: As of Oct 14, 2026, GPT-5.5 leads Muse Glimmer in Reasoning at #25 against #82.
Coding › Web dev: As of Oct 14, 2026, GPT-5.5 leads Muse Glimmer in Coding › Web dev at #44 against #86.
Long context: As of Oct 14, 2026, GPT-5.5 leads Muse Glimmer in Long context at #23 against #97.
Factuality: As of Oct 14, 2026, GPT-5.5 leads Muse Glimmer in Factuality at #5 against #107.
GPT-5.5 or Muse Glimmer?
As of Oct 14, 2026, GPT-5.5 leads Muse Glimmer in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
GPT-5.5 or Muse Glimmer for General LLM?
As of Oct 14, 2026, GPT-5.5 leads Muse Glimmer in General LLM at #21 against #86.
GPT-5.5 or Muse Glimmer for Reasoning?
As of Oct 14, 2026, GPT-5.5 leads Muse Glimmer in Reasoning at #25 against #82.
GPT-5.5 or Muse Glimmer for Coding › Web dev?
As of Oct 14, 2026, GPT-5.5 leads Muse Glimmer in Coding › Web dev at #44 against #86.