Muse Spark Open vs Step 3.7 Flash
Muse Spark Open leads the LLM Stats Score 45.3 to 29.7. Step 3.7 Flash is 4.6x cheaper per token.
Meta · StepFun · Updated for 2026
Which is better?
Muse Spark Open leads the overall LLM Stats Score 45.3 to 29.7, ranking #42 overall.
In the 1 individual benchmarks reported for both models, Muse Spark Open wins 1; this is a narrower head-to-head signal than the composite indexes.
On price, Step 3.7 Flash is roughly 4.6x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Muse Spark Open also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Muse Spark Open
- overall performance matters — it scores 45.3 and ranks #42 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
- you process long inputs — it offers a 1,048,576 token context window
- you want the most recent training data — it shipped Oct 2026
Choose Step 3.7 Flash
- cost matters — it's about 4.6x cheaper per token
At a glance
The differences that matter most.
Individual benchmarks
17 reported for Muse Spark Open · 4 for Step 3.7 Flash
Muse Spark Open outperforms in 1 benchmarks (Terminal-Bench 2.1), while Step 3.7 Flash is better at 0 benchmarks.
Muse Spark Open significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Muse Spark Open ($1.25/1M tokens) is 6.3x more expensive than Step 3.7 Flash ($0.20/1M tokens).
For output processing, Muse Spark Open ($4.25/1M tokens) is 3.7x more expensive than Step 3.7 Flash ($1.15/1M tokens).
In conclusion, Muse Spark Open is more expensive than Step 3.7 Flash.*
* Using a 3:1 ratio of input to output tokens
Model Size
Parameter count comparison
Muse Spark Open has 618.0B more parameters than Step 3.7 Flash, making it 312.1% larger.
Context Window
Maximum input and output token capacity
Muse Spark Open accepts 1,048,576 input tokens compared to Step 3.7 Flash's 262,144 tokens. Muse Spark Open can generate longer responses up to 1,048,576 tokens, while Step 3.7 Flash is limited to 262,144 tokens.
Input capabilities
Documented input modalities across available providers
Both Muse Spark Open and Step 3.7 Flash support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Muse Spark Open
Step 3.7 Flash
License
Usage and distribution terms
Muse Spark Open is licensed under Muse Model License, while Step 3.7 Flash uses Apache 2.0.
License differences may affect how you can use these models in commercial or open-source projects.
Muse Model License
Open weights
Apache 2.0
Open weights
Release Timeline
When each model was launched
Muse Spark Open was released on 2026-10-15, while Step 3.7 Flash was released on 2026-06-10.
Muse Spark Open is 4 months newer than Step 3.7 Flash.
Oct 15, 2026
1 weeks ago
4mo newerJun 10, 2026
4 months ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Muse Spark Open is available from Together. Step 3.7 Flash is available from DeepInfra.
Muse Spark Open
Step 3.7 Flash
Outputs Comparison
Judge for yourself.
Run your own prompts against Muse Spark Open and Step 3.7 Flash side-by-side, then vote on the output you prefer.
FAQ
Common questions about Muse Spark Open vs Step 3.7 Flash.