Grok Code Fast 1 vs Muse Spark Open
Muse Spark Open leads the LLM Stats Score 44.9 to 20.6. Grok Code Fast 1 is 3.8x cheaper per token.
xAI · Meta · Updated for 2026
Which is better?
Muse Spark Open leads the overall LLM Stats Score 44.9 to 20.6, ranking #43 overall.
On price, Grok Code Fast 1 is roughly 3.8x 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 Grok Code Fast 1
- cost matters — it's about 3.8x cheaper per token
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 process long inputs — it offers a 1,048,576 token context window
- you want the most recent training data — it shipped Oct 2026
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Individual benchmarks
1 reported for Grok Code Fast 1 · 17 for Muse Spark Open
Grok Code Fast 1 and Muse Spark Opendon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Grok Code Fast 1 ($0.20/1M tokens) is 6.3x cheaper than Muse Spark Open ($1.25/1M tokens).
For output processing, Grok Code Fast 1 ($1.50/1M tokens) is 2.8x cheaper than Muse Spark Open ($4.25/1M tokens).
In conclusion, Muse Spark Open is more expensive than Grok Code Fast 1.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Muse Spark Open accepts 1,048,576 input tokens compared to Grok Code Fast 1's 256,000 tokens. Muse Spark Open can generate longer responses up to 1,048,576 tokens, while Grok Code Fast 1 is limited to 10,000 tokens.
Input capabilities
Documented input modalities across available providers
Muse Spark Open supports multimodal inputs, whereas Grok Code Fast 1 does not.
Muse Spark Open can handle both text and other forms of data like images, making it suitable for multimodal applications.
Grok Code Fast 1
Muse Spark Open
License
Usage and distribution terms
Grok Code Fast 1 is licensed under a proprietary license, while Muse Spark Open uses Muse Model License.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
Muse Model License
Open weights
Release Timeline
When each model was launched
Grok Code Fast 1 was released on 2025-08-28, while Muse Spark Open was released on 2026-10-15.
Muse Spark Open is 14 months newer than Grok Code Fast 1.
Aug 28, 2025
1.1 years ago
Oct 15, 2026
2 days ago
1.1yr newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Grok Code Fast 1 is available from xAI. Muse Spark Open is available from Together.
Grok Code Fast 1
Muse Spark Open
Outputs Comparison
Judge for yourself.
Run your own prompts against Grok Code Fast 1 and Muse Spark Open side-by-side, then vote on the output you prefer.
FAQ
Common questions about Grok Code Fast 1 vs Muse Spark Open.