Grok-4.1 Fast Reasoning vs MiMo-V2.6-Pro
Comparing Grok-4.1 Fast Reasoning and MiMo-V2.6-Pro across benchmarks, pricing, and capabilities.
xAI · Xiaomi · Updated for 2026
Which is better?
Grok-4.1 Fast Reasoning and MiMo-V2.6-Pro trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.
On price, Grok-4.1 Fast Reasoning is roughly 2.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Grok-4.1 Fast 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 Reasoning
- cost matters — it's about 2.0x cheaper per token
- you process long inputs — it offers a 2,000,000 token context window
Choose MiMo-V2.6-Pro
- you want the most recent training data — it shipped Sep 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 Reasoning · 18 for MiMo-V2.6-Pro
Grok-4.1 Fast Reasoning and MiMo-V2.6-Prodon'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 Reasoning ($0.20/1M tokens) is 2.2x cheaper than MiMo-V2.6-Pro ($0.43/1M tokens).
For output processing, Grok-4.1 Fast Reasoning ($0.50/1M tokens) is 1.7x cheaper than MiMo-V2.6-Pro ($0.87/1M tokens).
In conclusion, MiMo-V2.6-Pro is more expensive than Grok-4.1 Fast Reasoning.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Grok-4.1 Fast Reasoning accepts 2,000,000 input tokens compared to MiMo-V2.6-Pro's 1,048,576 tokens. Only Grok-4.1 Fast Reasoning specifies output context (30,000 tokens).
Input capabilities
Documented input modalities across available providers
Both Grok-4.1 Fast Reasoning and MiMo-V2.6-Pro support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Grok-4.1 Fast Reasoning
MiMo-V2.6-Pro
License
Usage and distribution terms
Grok-4.1 Fast Reasoning is licensed under a proprietary license, while MiMo-V2.6-Pro uses MIT.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
MIT
Open weights
Release Timeline
When each model was launched
Grok-4.1 Fast Reasoning was released on 2025-11-17, while MiMo-V2.6-Pro was released on 2026-09-22.
MiMo-V2.6-Pro is 10 months newer than Grok-4.1 Fast Reasoning.
Nov 17, 2025
10 months ago
Sep 22, 2026
-1 days ago
10mo 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 Reasoning is available from xAI. MiMo-V2.6-Pro is available from Xiaomi.
Grok-4.1 Fast Reasoning
MiMo-V2.6-Pro
Outputs Comparison
Judge for yourself.
Run your own prompts against Grok-4.1 Fast Reasoning and MiMo-V2.6-Pro side-by-side, then vote on the output you prefer.
FAQ
Common questions about Grok-4.1 Fast Reasoning vs MiMo-V2.6-Pro.