Kimi K2.5 vs Muse Spark
Kimi K2.5 and Muse Spark are closely matched at 38.8 and 41.7 on the LLM Stats Score.
Moonshot AI · Meta · Updated for 2026
Which is better?
Kimi K2.5 and Muse Spark are closely matched on the overall LLM Stats Score at 38.8 and 41.7.
In the 10 individual benchmarks reported for both models, Muse Spark wins 9; 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 Kimi K2.5
- you need open weights you can self-host or fine-tune
Choose Muse Spark
- you value its reported benchmark strengths — it wins 9 of 10 exact shared results
- you want the most recent training data — it shipped Apr 2026
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
40 reported for Kimi K2.5 · 19 for Muse Spark
Kimi K2.5 outperforms in 1 benchmarks (DeepSearchQA), while Muse Spark is better at 9 benchmarks (CharXiv-R, GPQA, Humanity's Last Exam, MMMU-Pro, SimpleVQA, SWE-Bench Pro, SWE-Bench Verified, Terminal-Bench 2.0, ZEROBench).
Muse Spark significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Only Kimi K2.5 specifies input context (262,100 tokens). Only Kimi K2.5 specifies output context (262,100 tokens).
Input capabilities
Documented input modalities across available providers
Both Kimi K2.5 and Muse Spark support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Kimi K2.5
Muse Spark
License
Usage and distribution terms
Kimi K2.5 is licensed under MIT, while Muse Spark uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
MIT
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
Kimi K2.5 was released on 2026-01-27, while Muse Spark was released on 2026-04-08.
Muse Spark is 2 months newer than Kimi K2.5.
Jan 27, 2026
7 months ago
Apr 8, 2026
5 months ago
2mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Outputs Comparison
Judge for yourself.
Run your own prompts against Kimi K2.5 and Muse Spark side-by-side, then vote on the output you prefer.
FAQ
Common questions about Kimi K2.5 vs Muse Spark.