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Grok-4 Heavy vs MiniMax M3.1 Flash

Grok-4 Heavy and MiniMax M3.1 Flash are closely matched at 40.7 and 48.5 on the LLM Stats Score.

xAI · MiniMax · Updated for 2026

Which is better?

Grok-4 Heavy and MiniMax M3.1 Flash are closely matched on the overall LLM Stats Score at 40.7 and 48.5.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Grok-4 Heavy

  • you are already invested in the xAI ecosystem

Choose MiniMax M3.1 Flash

  • your work emphasizes coding — it leads those capability indexes

At a glance

The differences that matter most.

Grok-4 Heavy
xAI
MiniMax M3.1 Flash
MiniMax
Core performance indexes
LLM Stats Score
40.7
#71
48.5
#29
Reasoning
39.0
#73
45.8
#34
Coding
17.6
#134
37.8
#23
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
$0.15 / M
Output price
— / M
$0.60 / M
Context window
—
1,000,000

Individual benchmarks

6 reported for Grok-4 Heavy · 14 for MiniMax M3.1 Flash

No common benchmarks found

Grok-4 Heavy and MiniMax M3.1 Flashdon'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

Context Window

Maximum input and output token capacity

Only MiniMax M3.1 Flash specifies input context (1,000,000 tokens). Only MiniMax M3.1 Flash specifies output context (524,288 tokens).

xAI
Grok-4 Heavy
Input- tokens
Output- tokens
MiniMax
MiniMax M3.1 Flash
Input1,000,000 tokens
Output524,288 tokens
Mon Oct 19 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Grok-4 Heavy and MiniMax M3.1 Flash support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Grok-4 Heavy

Text
Images
Audio
Video

MiniMax M3.1 Flash

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Grok-4 Heavy

Proprietary

Closed source

MiniMax M3.1 Flash

Proprietary

Closed source

Release Timeline

When each model was launched

MiniMax M3.1 Flash was released on 2026-10-19, while Grok-4 Heavy's release date is not specified.

We can confirm MiniMax M3.1 Flash's release timeline, but cannot make a direct age comparison without Grok-4 Heavy's release date.

Grok-4 Heavy

—

MiniMax M3.1 Flash

Oct 19, 2026

-2 days ago

Knowledge Cutoff

When training data ends

Grok-4 Heavy has a documented knowledge cutoff of 2024-12-31, while MiniMax M3.1 Flash's cutoff date is not specified.

We can confirm Grok-4 Heavy's training data extends to 2024-12-31, but cannot make a direct comparison without MiniMax M3.1 Flash's cutoff date.

Grok-4 Heavy

Dec 2024

MiniMax M3.1 Flash

—

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Grok-4 Heavy and MiniMax M3.1 Flash side-by-side, then vote on the output you prefer.

Grok-4 Heavy
✓ Preferred
MiniMax M3.1 Flash
Open in Playground

FAQ

Common questions about Grok-4 Heavy vs MiniMax M3.1 Flash.

Which is better, Grok-4 Heavy or MiniMax M3.1 Flash?

Grok-4 Heavy and MiniMax M3.1 Flash are closely matched on the LLM Stats Score at 40.7 and 48.5. Grok-4 Heavy is made by xAI and MiniMax M3.1 Flash is made by MiniMax. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Grok-4 Heavy compare to MiniMax M3.1 Flash in benchmarks?

Grok-4 Heavy scores AIME 2025: 100.0%, HMMT25: 96.7%, GPQA: 88.4%, LiveCodeBench: 79.4%, USAMO25: 61.9%. MiniMax M3.1 Flash scores BabyVision: 91.0%, CharXiv-R: 82.5%, CyberGym: 82.2%, BankerToolBench: 76.2%, DeepSWE 1.1: 73.7%.

What are the context window sizes for Grok-4 Heavy and MiniMax M3.1 Flash?

Grok-4 Heavy supports an unknown number of tokens and MiniMax M3.1 Flash supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Grok-4 Heavy and MiniMax M3.1 Flash?

Key differences include LLM Stats Score (40.7 vs 48.5). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok-4 Heavy and MiniMax M3.1 Flash?

Grok-4 Heavy is developed by xAI and MiniMax M3.1 Flash is developed by MiniMax.

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