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  5. Grok 4.1 FastvsMiMo-V2.6-Pro
Updated Sep 2026

Grok 4.1 FastvsMiMo-V2.6-Pro

MiMo-V2.6-Pro is the newer model, released after Grok 4.1 Fast.

Grok 4.1 Fast and MiMo-V2.6-Pro compared across 9 shared prompts
SpecGrok 4.1 FastMiMo-V2.6-Pro
Input price—$0.435/M tokens
Output price—$0.87/M tokens
Context window—1.0M tokens
Free API (OpenRouter)NoNo
ReleasedNov 2025Sep 2026
Side by side

Same prompt, both answers

Opening lines from 4 of the 9 prompts both answered. Formatting stripped, words untouched.

Simple 7-Ingredient Recipe

Create a simple recipe for a delicious dish (sweet or savory) using only 7 common pantry ingredients. Include a creative name for the dish…

Grok 4.1 Fast208 words
Pantry Raid Garlic Tomato Pasta A savory, garlicky one-pan wonder that's ready in under 20 minutes—perfect for when hunger strikes and the fridge is empty! Serves: 2 Prep time: 5 minutes Cook time: 12 minutes Total time: 17 minutes Ingredients (exactly 7 common pantry staples): 200g spaghetti or any pasta (2 handfuls)…
Read the full answer
MiMo-V2.6-Pro332 words
🍝 Moonlight Garlic Kiss Pasta A silky, garlicky butter pasta that proves simple ingredients can make something truly unforgettable. 7 Pantry Ingredients # Ingredient Amount 1 Spaghetti (or any pasta) 8 oz (half a standard box) 2 Butter 4 tablespoons 3 Garlic cloves 5 cloves, thinly sliced 4 Parmesan cheese ½ cup…
Read the full answer

Explain Like I'm a Specific Expert

Explain how a large language model (like GPT or Claude) learns and generates text to each of these three audiences: 1. **An experienced…

Grok 4.1 Fast874 words
Explanation for the Experienced Software Engineer Think of a large language model (LLM) like GPT as an enormous, distributed autocomplete engine built on a transformer architecture—imagine a system where every API endpoint you've ever queried is distilled into a single, massively parallelizable service that handles…
Read the full answer
MiMo-V2.6-Pro1,338 words
Explaining Large Language Models to Three Audiences For the Software Engineer Think of an LLM as the most lossy, most brilliant compression algorithm ever built — except it's not compressing a specific file, it's compressing the patterns of human language into a fixed set of ~1 trillion floating-point parameters.
Read the full answer

Beginner's Longevity Plan

Outline a simple, actionable 1-month plan for someone starting their journey towards better health and longevity. Focus on 3 key areas…

Grok 4.1 Fast555 words
1-Month Plan for Better Health and Longevity This beginner-friendly plan focuses on three foundational areas: Diet, Exercise, and Sleep. These pillars drive longevity by reducing inflammation, building resilience, and optimizing recovery. Commit to small, consistent changes—aim for 80% adherence.
Read the full answer
MiMo-V2.6-Pro679 words
🌱 Your 1-Month Health & Longevity Starter Plan The 3 Pillars: Move · Nourish · Recover 🏃 MOVE (Exercise) Goal: Build a consistent, sustainable movement habit. Week 1 — Just Show Up Walk for 20 minutes daily (after lunch or dinner works great).
Read the full answer

Startup Pitch Teardown

Here's a pitch deck summary for a startup called "MindMeld AI": **Slide 1 - Vision:** "We're building the future of human-AI collaboration.…

Grok 4.1 Fast501 words
Solution Claim: "94% accuracy" for decoding neural patterns into text via EEG headband Why it's weak: This is by far the most exaggerated technical claim, as current non-invasive EEG-based brain-computer interfaces (BCIs) for text generation achieve nowhere near 94% accuracy in real-world conditions.
Read the full answer
MiMo-V2.6-Pro1,037 words
The 3 Weakest Claims in the MindMeld AI Pitch 🔴 "94% accuracy" non-invasive EEG decoding into text — (Slide 3) Why it's weak This is the claim the entire company rests on, and it directly contradicts the published state of the art.
Read the full answer
Our Verdict
Grok 4.1 Fast
Grok 4.1 Fast
MiMo-V2.6-Pro
MiMo-V2.6-ProRunner-up

Not enough votes to call it. On the specs, Grok 4.1 Fast has the edge: bigger model tier, major provider backing.

Too close to call
API pricing

Cost per 1M tokens

Grok 4.1 Fast
Input
—
Output
—
MiMo-V2.6-Pro
Input
$0.43
Output
$0.87
Where to run it

2 hosts

Grok 4.1 Fast

No hosts listed on OpenRouter.

MiMo-V2.6-Pro2 hosts
HostInOutContextUptime
DDeepInfrafp8$0.43 in·$0.87 out·1M·99.2% upXiaomifp8$0.43 in·$0.87 out·1M·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

Grok 4.1 Fast is developed by xAI while MiMo-V2.6-Pro is developed by Xiaomi. You can compare their actual outputs across 9 challenges on Rival to see how they differ in practice.

It depends on your use case. Grok 4.1 Fast and MiMo-V2.6-Pro each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 9 challenges so you can judge which fits your needs best.

This page shows a side-by-side comparison of Grok 4.1 Fast and MiMo-V2.6-Pro across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

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Same lab, same size, long tail

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Grok 4.1 Fast vs Grok 4.7Same lab
Grok 4.1 Fast logoGrok 4.6 logo
Grok 4.1 Fast vs Grok 4.6Same lab
MiMo-V2.6-Pro logoMiMo-V2.6-Flash logo
MiMo-V2.6-Pro vs MiMo-V2.6-FlashSame lab
MiMo-V2.6-Pro logoMiMo-V2.5 logo
MiMo-V2.6-Pro vs MiMo-V2.5Same lab
Grok 4.1 Fast logoMiMo-V2.6-Flash logo
Grok 4.1 Fast vs MiMo-V2.6-FlashCross-provider
MiMo-V2.6-Pro logoMiniMax M1 logo
MiMo-V2.6-Pro vs MiniMax M1New provider
MiMo-V2.6-Pro logoMiniMax M2 logo
MiMo-V2.6-Pro vs MiniMax M2New provider
Grok 4.1 Fast logoMiniMax M2-her logo
Grok 4.1 Fast vs MiniMax M2-herNew provider

Model pages

Grok 4.1 Fast logo
Grok 4.1 Fast59 outputs, specs and price
MiMo-V2.6-Pro logo
MiMo-V2.6-Pro9 outputs, specs and price
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