Muse Spark 1.2 vs Step 5 Preview
As of Oct 15, 2026, Muse Spark 1.2 leads Step 5 Preview in 4 of 5 shared categories: General LLM, Reasoning, Long context, and Factuality.
Muse Spark 1.2
It used to be. Was SOTA in General LLM.
Step 5 Preview
#33 Best current rank: #33 in Coding › Web dev, as of Oct 15, 2026.
| Category | Muse Spark 1.2 | Step 5 Preview |
|---|---|---|
| General LLM | #8 · Was SOTA · General LLM Margin 4.255319148936167 LMArena leaderboard dataset · Oct 13, 2026 | #77 · #77 in General LLM Margin 40.95744680851064 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #11 · #11 in Reasoning Margin 6.38297872340425 LMArena leaderboard dataset · Oct 13, 2026 | #63 · #63 in Reasoning Margin 34.04255319148936 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 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | #42 · #42 in Coding › Web dev Margin 32.8 LMArena leaderboard dataset · Oct 13, 2026 | #33 · #33 in Coding › Web dev Margin 25.599999999999994 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #17 · Was SOTA · Long context Margin 9.042553191489361 LMArena leaderboard dataset · Oct 13, 2026 | #68 · #68 in Long context Margin 36.170212765957444 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #27 · #27 in Vision Margin 73.6842105263158 Epoch AI benchmarking hub · Aug 5, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #9 · Was SOTA · Factuality Margin 5.813953488372093 LMArena leaderboard dataset · Oct 13, 2026 | #69 · #69 in Factuality Margin 40.69767441860465 LMArena leaderboard dataset · Oct 13, 2026 |
Muse Spark 1.2: $2.0000000000000004 per 1M blended tokens.
Step 5 Preview: $1.4249999999999998 per 1M blended tokens.
Muse Spark 1.2: closed weights.
Step 5 Preview: closed weights.
General LLM: As of Oct 15, 2026, Muse Spark 1.2 leads Step 5 Preview in General LLM at #8 against #77.
Reasoning: As of Oct 15, 2026, Muse Spark 1.2 leads Step 5 Preview in Reasoning at #11 against #63.
Coding › Web dev: As of Oct 15, 2026, Step 5 Preview leads Muse Spark 1.2 in Coding › Web dev at #33 against #42.
Long context: As of Oct 15, 2026, Muse Spark 1.2 leads Step 5 Preview in Long context at #17 against #68.
Factuality: As of Oct 15, 2026, Muse Spark 1.2 leads Step 5 Preview in Factuality at #9 against #69.
Muse Spark 1.2 · Step 5 Preview
Muse Spark 1.2 or Step 5 Preview?
As of Oct 15, 2026, Muse Spark 1.2 leads Step 5 Preview in 4 of 5 shared categories: General LLM, Reasoning, Long context, and Factuality.
Muse Spark 1.2 or Step 5 Preview for General LLM?
As of Oct 15, 2026, Muse Spark 1.2 leads Step 5 Preview in General LLM at #8 against #77.
Muse Spark 1.2 or Step 5 Preview for Reasoning?
As of Oct 15, 2026, Muse Spark 1.2 leads Step 5 Preview in Reasoning at #11 against #63.
Muse Spark 1.2 or Step 5 Preview for Coding › Web dev?
As of Oct 15, 2026, Step 5 Preview leads Muse Spark 1.2 in Coding › Web dev at #33 against #42.