Muse Spark Open vs Phi 4 Reasoning
Muse Spark Open leads the LLM Stats Score 44.9 to 11.7.
Meta · Microsoft · Updated for 2026
Which is better?
Muse Spark Open leads the overall LLM Stats Score 44.9 to 11.7, ranking #43 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.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Muse Spark Open
- overall performance matters — it scores 44.9 and ranks #43 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 want the most recent training data — it shipped Oct 2026
Choose Phi 4 Reasoning
- you are already invested in the Microsoft ecosystem
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
17 reported for Muse Spark Open · 11 for Phi 4 Reasoning
Muse Spark Open outperforms in 1 benchmarks (GPQA), while Phi 4 Reasoning is better at 0 benchmarks.
Muse Spark Open significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Model Size
Parameter count comparison
Muse Spark Open has 802.0B more parameters than Phi 4 Reasoning, making it 5728.6% larger.
Context Window
Maximum input and output token capacity
Only Muse Spark Open specifies input context (1,048,576 tokens). Only Muse Spark Open specifies output context (1,048,576 tokens).
Input capabilities
Documented input modalities across available providers
Muse Spark Open supports multimodal inputs, whereas Phi 4 Reasoning does not.
Muse Spark Open can handle both text and other forms of data like images, making it suitable for multimodal applications.
Muse Spark Open
Phi 4 Reasoning
License
Usage and distribution terms
Muse Spark Open is licensed under Muse Model License, while Phi 4 Reasoning uses MIT.
License differences may affect how you can use these models in commercial or open-source projects.
Muse Model License
Open weights
MIT
Open weights
Release Timeline
When each model was launched
Muse Spark Open was released on 2026-10-15, while Phi 4 Reasoning was released on 2025-04-30.
Muse Spark Open is 18 months newer than Phi 4 Reasoning.
Oct 15, 2026
4 days ago
1.5yr newerApr 30, 2025
1.5 years ago
Knowledge Cutoff
When training data ends
Phi 4 Reasoning has a documented knowledge cutoff of 2025-03-01, while Muse Spark Open's cutoff date is not specified.
We can confirm Phi 4 Reasoning's training data extends to 2025-03-01, but cannot make a direct comparison without Muse Spark Open's cutoff date.
—
Mar 2025
Outputs Comparison
Judge for yourself.
Run your own prompts against Muse Spark Open and Phi 4 Reasoning side-by-side, then vote on the output you prefer.
FAQ
Common questions about Muse Spark Open vs Phi 4 Reasoning.