Claude Opus 5.5 vs Muse Spark 1.2
As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.2 in 6 of 6 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, Vision, 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 1.2
It used to be. Was SOTA in General LLM.
| Category | Claude Opus 5.5 | Muse Spark 1.2 |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.3605442176870781 LMArena leaderboard dataset · Oct 13, 2026 | #8 · Was SOTA · General LLM Margin 5.442176870748298 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #11 · #11 in Reasoning Margin 8.219178082191775 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 | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 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 | #40 · #40 in Coding › Web dev Margin 36.44859813084112 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #16 · Was SOTA · Long context Margin 10.884353741496597 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 | #27 · #27 in Vision Margin 73.6842105263158 Epoch AI benchmarking hub · Aug 5, 2026 |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #9 · Was SOTA · Factuality Margin 7.462686567164198 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 1.2: $2.0000000000000004 per 1M blended tokens.
Claude Opus 5.5: closed weights.
Muse Spark 1.2: closed weights.
General LLM: As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.2 in General LLM at #2 against #8.
Reasoning: As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.2 in Reasoning at #1 against #11.
Coding › Web dev: As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.2 in Coding › Web dev at #1 against #40.
Long context: As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.2 in Long context at #1 against #16.
Vision: As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.2 in Vision at #4 against #27.
Factuality: As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.2 in Factuality at #1 against #9.
Claude Opus 5.5 · Muse Spark 1.2
Claude Opus 5.5 or Muse Spark 1.2?
As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.2 in 6 of 6 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, Vision, and Factuality.
Claude Opus 5.5 or Muse Spark 1.2 for General LLM?
As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.2 in General LLM at #2 against #8.
Claude Opus 5.5 or Muse Spark 1.2 for Reasoning?
As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.2 in Reasoning at #1 against #11.
Claude Opus 5.5 or Muse Spark 1.2 for Coding › Web dev?
As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.2 in Coding › Web dev at #1 against #40.