Kimi K3 vs Muse Spark 1.2
Kimi K3 leads the LLM Stats Score 54.7 to 41.1. Muse Spark 1.2 is 48.0x cheaper per token.
Moonshot AI · Meta · Updated for 2026
Which is better?
Kimi K3 leads the overall LLM Stats Score 54.7 to 41.1, ranking #5 overall.
In the 2 individual benchmarks reported for both models, Kimi K3 wins 2; this is a narrower head-to-head signal than the composite indexes.
On price, Muse Spark 1.2 is roughly 48.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Kimi K3
- overall performance matters — it scores 54.7 and ranks #5 on LLM Stats
- your work emphasizes reasoning — it leads those capability indexes
- you value its reported benchmark strengths — it wins 2 of 2 exact shared results
- you need open weights you can self-host or fine-tune
Choose Muse Spark 1.2
- cost matters — it's about 48.0x cheaper per token
- you want the most recent training data — it shipped Aug 2026
At a glance
The differences that matter most.
Individual benchmarks
31 reported for Kimi K3 · 3 for Muse Spark 1.2
Kimi K3 outperforms in 2 benchmarks (DeepSWE 1.1, Terminal-Bench 2.1), while Muse Spark 1.2 is better at 0 benchmarks.
Kimi K3 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, Kimi K3 ($3.00/1M tokens) is 30.0x more expensive than Muse Spark 1.2 ($0.10/1M tokens).
For output processing, Kimi K3 ($15.00/1M tokens) is 75.0x more expensive than Muse Spark 1.2 ($0.20/1M tokens).
In conclusion, Kimi K3 is more expensive than Muse Spark 1.2.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Both models have the same input context window of 1,048,576 tokens. Kimi K3 can generate longer responses up to 1,048,576 tokens, while Muse Spark 1.2 is limited to 131,072 tokens.
Input capabilities
Documented input modalities across available providers
Both Kimi K3 and Muse Spark 1.2 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Kimi K3
Muse Spark 1.2
License
Usage and distribution terms
Kimi K3 is licensed under Kimi K3 License, while Muse Spark 1.2 uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
Kimi K3 License
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
Kimi K3 was released on 2026-07-16, while Muse Spark 1.2 was released on 2026-08-05.
Muse Spark 1.2 is 1 month newer than Kimi K3.
Jul 16, 2026
1 months ago
Aug 5, 2026
3 weeks ago
2w newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Kimi K3 is available from Fireworks, Moonshot AI, Novita, Together. Muse Spark 1.2 is available from Meta Model API.
Kimi K3
Muse Spark 1.2
Outputs Comparison
Judge for yourself.
Run your own prompts against Kimi K3 and Muse Spark 1.2 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Kimi K3 vs Muse Spark 1.2.