Muse Spark 1.3 vs Step 5 Preview
As of Oct 14, 2026, Muse Spark 1.3 leads Step 5 Preview in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Muse Spark 1.3
Yes. Yes on Coding › Web dev (best per dollar); Vision (best per dollar). Not the overall leader.
Step 5 Preview
#31 Best current rank: #31 in Coding › Web dev, as of Oct 14, 2026.
| Category | Muse Spark 1.3 | Step 5 Preview |
|---|---|---|
| General LLM | #9 · #9 in General LLM Margin 6.122448979591837 LMArena leaderboard dataset · Oct 13, 2026 | #60 · #60 in General LLM Margin 40.816326530612244 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #8 · #8 in Reasoning Margin 6.164383561643831 LMArena leaderboard dataset · Oct 13, 2026 | #49 · #49 in Reasoning Margin 34.246575342465746 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 |
| Coding | #18 · #18 in Coding Margin 86.36363636363636 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #18 · #18 in Coding › Agentic Margin 86.36363636363636 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #10 · #10 in Coding › Web dev Margin 8.411214953271028 LMArena leaderboard dataset · Oct 13, 2026 | #31 · #31 in Coding › Web dev Margin 28.037383177570092 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #15 · #15 in Long context Margin 10.204081632653057 LMArena leaderboard dataset · Oct 13, 2026 | #56 · #56 in Long context Margin 38.095238095238095 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #8 · #8 in Vision Margin 23.684210526315795 Epoch AI benchmarking hub · Sep 2, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #11 · #11 in Factuality Margin 8.955223880597018 LMArena leaderboard dataset · Oct 13, 2026 | #57 · #57 in Factuality Margin 43.28358208955224 LMArena leaderboard dataset · Oct 13, 2026 |
Muse Spark 1.3: $2.0000000000000004 per 1M blended tokens.
Step 5 Preview: $1.4249999999999998 per 1M blended tokens.
Muse Spark 1.3: closed weights.
Step 5 Preview: closed weights.
General LLM: As of Oct 14, 2026, Muse Spark 1.3 leads Step 5 Preview in General LLM at #9 against #60.
Reasoning: As of Oct 14, 2026, Muse Spark 1.3 leads Step 5 Preview in Reasoning at #8 against #49.
Coding › Web dev: As of Oct 14, 2026, Muse Spark 1.3 leads Step 5 Preview in Coding › Web dev at #10 against #31.
Long context: As of Oct 14, 2026, Muse Spark 1.3 leads Step 5 Preview in Long context at #15 against #56.
Factuality: As of Oct 14, 2026, Muse Spark 1.3 leads Step 5 Preview in Factuality at #11 against #57.
Muse Spark 1.3 · Step 5 Preview
Muse Spark 1.3 or Step 5 Preview?
As of Oct 14, 2026, Muse Spark 1.3 leads Step 5 Preview in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Muse Spark 1.3 or Step 5 Preview for General LLM?
As of Oct 14, 2026, Muse Spark 1.3 leads Step 5 Preview in General LLM at #9 against #60.
Muse Spark 1.3 or Step 5 Preview for Reasoning?
As of Oct 14, 2026, Muse Spark 1.3 leads Step 5 Preview in Reasoning at #8 against #49.
Muse Spark 1.3 or Step 5 Preview for Coding › Web dev?
As of Oct 14, 2026, Muse Spark 1.3 leads Step 5 Preview in Coding › Web dev at #10 against #31.