Claude Opus 4.5 vs Muse Spark
As of Oct 15, 2026, Claude Opus 4.5 leads Muse Spark in 1 of 7 shared categories: Long context.
Claude Opus 4.5
It used to be. Was SOTA in Reasoning.
Muse Spark
It used to be. Was SOTA in General LLM.
| Category | Claude Opus 4.5 | Muse Spark |
|---|---|---|
| General LLM | #41 · #41 in General LLM Margin 21.808510638297875 LMArena leaderboard dataset · Oct 13, 2026 | #12 · Was SOTA · General LLM Margin 6.38297872340425 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #30 · Was SOTA · Reasoning Margin 16.489361702127653 LMArena leaderboard dataset · Oct 13, 2026 | #17 · Was SOTA · Reasoning Margin 9.574468085106389 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #16 · #16 in Math Margin 33.33333333333333 Epoch AI benchmarking hub · Nov 24, 2025 | #7 · Was SOTA · Math Margin 13.333333333333329 Epoch AI benchmarking hub · Apr 8, 2026 |
| Science | #68 · #68 in Science Margin — Epoch AI benchmarking hub · Nov 24, 2025 | #37 · #37 in Science Margin — Epoch AI benchmarking hub · Apr 8, 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 | #58 · Was SOTA · Coding › Web dev Margin 45.6 LMArena leaderboard dataset · Oct 13, 2026 | #12 · #12 in Coding › Web dev Margin — LMArena leaderboard dataset · Jun 5, 2026 |
| Long context | #20 · Was SOTA · Long context Margin 10.63829787234043 LMArena leaderboard dataset · Oct 13, 2026 | #44 · #44 in Long context Margin 23.40425531914893 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | — | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #40 · #40 in Factuality Margin 23.837209302325576 LMArena leaderboard dataset · Oct 13, 2026 | #27 · #27 in Factuality Margin 16.279069767441854 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #49 · #49 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Nov 24, 2025 | — |
Claude Opus 4.5: $10 per 1M blended tokens.
Muse Spark: price per 1M tokens is unset in the catalog.
Claude Opus 4.5: closed weights.
Muse Spark: closed weights.
General LLM: As of Oct 15, 2026, Muse Spark leads Claude Opus 4.5 in General LLM at #12 against #41.
Reasoning: As of Oct 15, 2026, Muse Spark leads Claude Opus 4.5 in Reasoning at #17 against #30.
Math: As of Oct 15, 2026, Muse Spark leads Claude Opus 4.5 in Math at #7 against #16.
Science: As of Oct 15, 2026, Muse Spark leads Claude Opus 4.5 in Science at #37 against #68.
Coding › Web dev: As of Oct 15, 2026, Muse Spark leads Claude Opus 4.5 in Coding › Web dev at #12 against #58.
Long context: As of Oct 15, 2026, Claude Opus 4.5 leads Muse Spark in Long context at #20 against #44.
Factuality: As of Oct 15, 2026, Muse Spark leads Claude Opus 4.5 in Factuality at #27 against #40.
Claude Opus 4.5 or Muse Spark?
As of Oct 15, 2026, Claude Opus 4.5 leads Muse Spark in 1 of 7 shared categories: Long context.
Claude Opus 4.5 or Muse Spark for General LLM?
As of Oct 15, 2026, Muse Spark leads Claude Opus 4.5 in General LLM at #12 against #41.
Claude Opus 4.5 or Muse Spark for Reasoning?
As of Oct 15, 2026, Muse Spark leads Claude Opus 4.5 in Reasoning at #17 against #30.
Claude Opus 4.5 or Muse Spark for Math?
As of Oct 15, 2026, Muse Spark leads Claude Opus 4.5 in Math at #7 against #16.