Claude Opus 5.5 vs Muse Spark 1.3
As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.3 in 8 of 8 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, and Factuality.
Claude Opus 5.5
Yes. SOTA in Reasoning (tied), Coding (tied), Coding › Agentic (tied), Coding › Web dev, Long context (tied), and Factuality (tied).
Muse Spark 1.3
Yes. Yes on Coding › Web dev (best per dollar); Vision (best per dollar). Not the overall leader.
| Category | Claude Opus 5.5 | Muse Spark 1.3 |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.0638297872340416 LMArena leaderboard dataset · Oct 13, 2026 | #9 · #9 in General LLM Margin 4.7872340425531945 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #8 · #8 in Reasoning Margin 4.7872340425531945 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 | #18 · #18 in Coding Margin 86.36363636363636 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #18 · #18 in Coding › Agentic Margin 86.36363636363636 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Web dev | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #11 · #11 in Coding › Web dev Margin 8 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #15 · #15 in Long context Margin 7.978723404255305 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 | #8 · #8 in Vision Margin 23.684210526315795 Epoch AI benchmarking hub · Sep 2, 2026 |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #12 · #12 in Factuality Margin 7.558139534883736 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 1.3: $2.0000000000000004 per 1M blended tokens.
Claude Opus 5.5: closed weights.
Muse Spark 1.3: closed weights.
General LLM: As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.3 in General LLM at #2 against #9.
Reasoning: As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.3 in Reasoning at #1 against #8.
Coding: As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.3 in Coding at #1 against #18.
Coding › Agentic: As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.3 in Coding › Agentic at #1 against #18.
Coding › Web dev: As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.3 in Coding › Web dev at #1 against #11.
Long context: As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.3 in Long context at #1 against #15.
Vision: As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.3 in Vision at #4 against #8.
Factuality: As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.3 in Factuality at #1 against #12.
Claude Opus 5.5 · Muse Spark 1.3
Claude Opus 5.5 or Muse Spark 1.3?
As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.3 in 8 of 8 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, and Factuality.
Claude Opus 5.5 or Muse Spark 1.3 for General LLM?
As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.3 in General LLM at #2 against #9.
Claude Opus 5.5 or Muse Spark 1.3 for Reasoning?
As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.3 in Reasoning at #1 against #8.
Claude Opus 5.5 or Muse Spark 1.3 for Coding?
As of Oct 15, 2026, Claude Opus 5.5 leads Muse Spark 1.3 in Coding at #1 against #18.