Grok-4.1 Fast Non-Reasoning vs Muse Spark Open
Comparing Grok-4.1 Fast Non-Reasoning and Muse Spark Open across benchmarks, pricing, and capabilities.
xAI · Meta · Updated for 2026
Which is better?
Grok-4.1 Fast Non-Reasoning and Muse Spark Open trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.
On price, Grok-4.1 Fast Non-Reasoning is roughly 7.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Grok-4.1 Fast Non-Reasoning also accepts a larger context window (2,000,000 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-4.1 Fast Non-Reasoning
- cost matters — it's about 7.3x cheaper per token
- you process long inputs — it offers a 2,000,000 token context window
Choose Muse Spark Open
- 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
0 reported for Grok-4.1 Fast Non-Reasoning · 17 for Muse Spark Open
Grok-4.1 Fast Non-Reasoning 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-4.1 Fast Non-Reasoning ($0.20/1M tokens) is 6.3x cheaper than Muse Spark Open ($1.25/1M tokens).
For output processing, Grok-4.1 Fast Non-Reasoning ($0.50/1M tokens) is 8.5x cheaper than Muse Spark Open ($4.25/1M tokens).
In conclusion, Muse Spark Open is more expensive than Grok-4.1 Fast Non-Reasoning.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Grok-4.1 Fast Non-Reasoning accepts 2,000,000 input tokens compared to Muse Spark Open's 1,048,576 tokens. Muse Spark Open can generate longer responses up to 1,048,576 tokens, while Grok-4.1 Fast Non-Reasoning is limited to 30,000 tokens.
Input capabilities
Documented input modalities across available providers
Both Grok-4.1 Fast Non-Reasoning and Muse Spark Open support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Grok-4.1 Fast Non-Reasoning
Muse Spark Open
License
Usage and distribution terms
Grok-4.1 Fast Non-Reasoning 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-4.1 Fast Non-Reasoning was released on 2025-11-17, while Muse Spark Open was released on 2026-10-15.
Muse Spark Open is 11 months newer than Grok-4.1 Fast Non-Reasoning.
Nov 17, 2025
11 months ago
Oct 15, 2026
4 days ago
11mo 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-4.1 Fast Non-Reasoning is available from xAI. Muse Spark Open is available from Together.
Grok-4.1 Fast Non-Reasoning
Muse Spark Open
Outputs Comparison
Judge for yourself.
Run your own prompts against Grok-4.1 Fast Non-Reasoning and Muse Spark Open side-by-side, then vote on the output you prefer.
FAQ
Common questions about Grok-4.1 Fast Non-Reasoning vs Muse Spark Open.
Related comparisons
More Grok-4.1 Fast Non-Reasoning comparisons
- Grok-4.1 Fast Non-Reasoning vs Mercury 3
- Grok-4.1 Fast Non-Reasoning vs MiniMax M3.1 Flash
- Grok-4.1 Fast Non-Reasoning vs DeepSeek-V4.1-Flash-1017
- Grok-4.1 Fast Non-Reasoning vs Beam 1.0
- Grok-4.1 Fast Non-Reasoning vs Nemotron Labs Dory 1.0 (4B)
- Grok-4.1 Fast Non-Reasoning vs Nemotron 3.5 Bolt (74B A9B 24GB)