Claude Opus 5 vs Muse Spark 1.2
As of Oct 14, 2026, Claude Opus 5 leads Muse Spark 1.2 in 5 of 6 shared categories: Reasoning, Coding › Web dev, Long context, Vision, and Factuality.
Claude Opus 5
Close. Near-SOTA in Factuality, rank #4.
Muse Spark 1.2
It used to be. Was SOTA in General LLM.
| Category | Claude Opus 5 | Muse Spark 1.2 |
|---|---|---|
| General LLM | #11 · Was SOTA · General LLM Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #8 · Was SOTA · General LLM Margin 5.442176870748298 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #9 · Was SOTA · Reasoning Margin 6.849315068493155 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 | #12 · #12 in Science Margin — Epoch AI benchmarking hub · Jul 24, 2026 | — |
| Coding | #4 · #4 in Coding Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #4 · #4 in Coding › Agentic Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #6 · Was SOTA · Coding › Web dev Margin 4.672897196261687 LMArena leaderboard dataset · Oct 13, 2026 | #40 · #40 in Coding › Web dev Margin 36.44859813084112 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #9 · Was SOTA · Long context Margin 6.122448979591837 LMArena leaderboard dataset · Oct 13, 2026 | #16 · Was SOTA · Long context Margin 10.884353741496597 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #12 · #12 in Vision Margin 36.8421052631579 Epoch AI benchmarking hub · Jul 24, 2026 | #27 · #27 in Vision Margin 73.6842105263158 Epoch AI benchmarking hub · Aug 5, 2026 |
| Factuality | #4 · Near-SOTA · Factuality Margin 3.731343283582092 LMArena leaderboard dataset · Oct 13, 2026 | #9 · Was SOTA · Factuality Margin 7.462686567164198 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 24, 2026 | — |
Claude Opus 5: $10 per 1M blended tokens.
Muse Spark 1.2: $2.0000000000000004 per 1M blended tokens.
Claude Opus 5: closed weights.
Muse Spark 1.2: closed weights.
General LLM: As of Oct 14, 2026, Muse Spark 1.2 leads Claude Opus 5 in General LLM at #8 against #11.
Reasoning: As of Oct 14, 2026, Claude Opus 5 leads Muse Spark 1.2 in Reasoning at #9 against #11.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 5 leads Muse Spark 1.2 in Coding › Web dev at #6 against #40.
Long context: As of Oct 14, 2026, Claude Opus 5 leads Muse Spark 1.2 in Long context at #9 against #16.
Vision: As of Oct 14, 2026, Claude Opus 5 leads Muse Spark 1.2 in Vision at #12 against #27.
Factuality: As of Oct 14, 2026, Claude Opus 5 leads Muse Spark 1.2 in Factuality at #4 against #9.
Claude Opus 5 · Muse Spark 1.2
Claude Opus 5 or Muse Spark 1.2?
As of Oct 14, 2026, Claude Opus 5 leads Muse Spark 1.2 in 5 of 6 shared categories: Reasoning, Coding › Web dev, Long context, Vision, and Factuality.
Claude Opus 5 or Muse Spark 1.2 for General LLM?
As of Oct 14, 2026, Muse Spark 1.2 leads Claude Opus 5 in General LLM at #8 against #11.
Claude Opus 5 or Muse Spark 1.2 for Reasoning?
As of Oct 14, 2026, Claude Opus 5 leads Muse Spark 1.2 in Reasoning at #9 against #11.
Claude Opus 5 or Muse Spark 1.2 for Coding › Web dev?
As of Oct 14, 2026, Claude Opus 5 leads Muse Spark 1.2 in Coding › Web dev at #6 against #40.