Claude Opus 5.5 vs Muse Spark
As of Oct 14, 2026, Claude Opus 5.5 leads Muse Spark in 6 of 6 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, and Factuality.
Claude Opus 5.5
Yes. SOTA in co-SOTA in Reasoning, co-SOTA in Coding, co-SOTA in Coding › Agentic, Coding › Web dev, co-SOTA in Long context and co-SOTA in Factuality.
Muse Spark
It used to be. Was SOTA in General LLM.
| Category | Claude Opus 5.5 | Muse Spark |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.3605442176870781 LMArena leaderboard dataset · Oct 13, 2026 | #12 · Was SOTA · General LLM Margin 8.163265306122454 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #17 · Was SOTA · Reasoning Margin 12.328767123287676 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #7 · Was SOTA · Math Margin 13.333333333333329 Epoch AI benchmarking hub · Apr 8, 2026 |
| Science | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #37 · #37 in Science Margin — Epoch AI benchmarking hub · Apr 8, 2026 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #8 · #8 in Coding › Web dev Margin — LMArena leaderboard dataset · Jun 5, 2026 |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #38 · #38 in Long context Margin 25.850340136054427 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #23 · #23 in Factuality Margin 17.910447761194035 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 | — |
Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.
Muse Spark: price per 1M tokens is unset in the catalog.
Claude Opus 5.5: closed weights.
Muse Spark: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads Muse Spark in General LLM at #2 against #12.
Reasoning: As of Oct 14, 2026, Claude Opus 5.5 leads Muse Spark in Reasoning at #1 against #17.
Science: As of Oct 14, 2026, Claude Opus 5.5 leads Muse Spark in Science at #31 against #37.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 5.5 leads Muse Spark in Coding › Web dev at #1 against #8.
Long context: As of Oct 14, 2026, Claude Opus 5.5 leads Muse Spark in Long context at #1 against #38.
Factuality: As of Oct 14, 2026, Claude Opus 5.5 leads Muse Spark in Factuality at #1 against #23.
Claude Opus 5.5 or Muse Spark?
As of Oct 14, 2026, Claude Opus 5.5 leads Muse Spark in 6 of 6 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, and Factuality.
Claude Opus 5.5 or Muse Spark for General LLM?
As of Oct 14, 2026, Claude Opus 5.5 leads Muse Spark in General LLM at #2 against #12.
Claude Opus 5.5 or Muse Spark for Reasoning?
As of Oct 14, 2026, Claude Opus 5.5 leads Muse Spark in Reasoning at #1 against #17.
Claude Opus 5.5 or Muse Spark for Science?
As of Oct 14, 2026, Claude Opus 5.5 leads Muse Spark in Science at #31 against #37.