Model Comparison

Grok-4 vs MiMo-V2-FlashWhich is better in 2026?

Grok-4 shows notably better performance in the majority of benchmarks. MiMo-V2-Flash is 40.0x cheaper per token.

Verdict: Grok-4 vs MiMo-V2-Flash — which is better?

Grok-4 (by xAI) and MiMo-V2-Flash (by Xiaomi) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Grok-4 outperforms in 2 benchmarks (GPQA, Humanity's Last Exam), while MiMo-V2-Flash is better at 1 benchmark (AIME 2025). Grok-4 shows notably better performance in the majority of benchmarks.

On price, MiMo-V2-Flash is roughly 40.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Choose Grok-4 if…

  • you want the strongest raw capability — it leads on 2 of 3 shared benchmarks

Choose MiMo-V2-Flash if…

  • cost matters — it's about 40.0x cheaper per token
  • you want the most recent training data — it shipped Dec 2025
  • you need open weights you can self-host or fine-tune
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Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Grok-4 outperforms in 2 benchmarks (GPQA, Humanity's Last Exam), while MiMo-V2-Flash is better at 1 benchmark (AIME 2025).

Grok-4 shows notably better performance in the majority of benchmarks.

Sun Jun 07 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

MiMo-V2-Flash costs less

For input processing, Grok-4 ($3.00/1M tokens) is 30.0x more expensive than MiMo-V2-Flash ($0.10/1M tokens).

For output processing, Grok-4 ($15.00/1M tokens) is 50.0x more expensive than MiMo-V2-Flash ($0.30/1M tokens).

In conclusion, Grok-4 is more expensive than MiMo-V2-Flash.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Sun Jun 07 2026 • llm-stats.com
xAI
Grok-4
Input tokens$3.00
Output tokens$15.00
Best providerxAI
Xiaomi
MiMo-V2-Flash
Input tokens$0.10
Output tokens$0.30
Best providerXiaomi
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Both models have the same input context window of 256,000 tokens. MiMo-V2-Flash can generate longer responses up to 16,384 tokens, while Grok-4 is limited to 8,000 tokens.

xAI
Grok-4
Input256,000 tokens
Output8,000 tokens
Xiaomi
MiMo-V2-Flash
Input256,000 tokens
Output16,384 tokens
Sun Jun 07 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Grok-4 supports multimodal inputs, whereas MiMo-V2-Flash does not.

Grok-4 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Grok-4

Text
Images
Audio
Video

MiMo-V2-Flash

Text
Images
Audio
Video

License

Usage and distribution terms

Grok-4 is licensed under a proprietary license, while MiMo-V2-Flash uses MIT.

License differences may affect how you can use these models in commercial or open-source projects.

Grok-4

Proprietary

Closed source

MiMo-V2-Flash

MIT

Open weights

Release Timeline

When each model was launched

Grok-4 was released on 2025-07-09, while MiMo-V2-Flash was released on 2025-12-16.

MiMo-V2-Flash is 5 months newer than Grok-4.

Grok-4

Jul 9, 2025

11 months ago

MiMo-V2-Flash

Dec 16, 2025

5 months ago

5mo newer

Knowledge Cutoff

When training data ends

Grok-4 has a documented knowledge cutoff of 2024-12-31, while MiMo-V2-Flash's cutoff date is not specified.

We can confirm Grok-4's training data extends to 2024-12-31, but cannot make a direct comparison without MiMo-V2-Flash's cutoff date.

Grok-4

Dec 2024

MiMo-V2-Flash

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Provider Availability

Grok-4 is available from xAI. MiMo-V2-Flash is available from Xiaomi.

Grok-4

xai logo
xAI
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

MiMo-V2-Flash

xiaomi logo
Xiaomi
Input Price:Input: $0.10/1MOutput Price:Output: $0.30/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

xAI
Supports multimodal inputs
Higher GPQA score (87.5% vs 83.7%)
Higher Humanity's Last Exam score (40.0% vs 22.1%)
Xiaomi
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher AIME 2025 score (94.1% vs 91.7%)
xAIGrok-4
XiaomiMiMo-V2-Flash
Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature
xAI
Grok-4
Xiaomi
MiMo-V2-Flash

FAQ

Common questions about Grok-4 vs MiMo-V2-Flash.

Which is better, Grok-4 or MiMo-V2-Flash?

Grok-4 shows notably better performance in the majority of benchmarks. Grok-4 is made by xAI and MiMo-V2-Flash is made by Xiaomi. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Grok-4 compare to MiMo-V2-Flash in benchmarks?

Grok-4 scores AIME 2025: 91.7%, HMMT25: 90.0%, GPQA: 87.5%, LiveCodeBench: 79.0%, Humanity's Last Exam: 40.0%. MiMo-V2-Flash scores AIME 2025: 94.1%, Arena-Hard v2: 86.2%, MMLU-Pro: 84.9%, HMMT 2025: 84.4%, GPQA: 83.7%.

Is Grok-4 cheaper than MiMo-V2-Flash?

MiMo-V2-Flash is 30.0x cheaper for input tokens. Grok-4 costs $3.00/M input and $15.00/M output via xai. MiMo-V2-Flash costs $0.10/M input and $0.30/M output via xiaomi.

What are the context window sizes for Grok-4 and MiMo-V2-Flash?

Grok-4 supports 256K tokens and MiMo-V2-Flash supports 256K 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 and MiMo-V2-Flash?

Key differences include input pricing ($3.00 vs $0.10/M), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok-4 and MiMo-V2-Flash?

Grok-4 is developed by xAI and MiMo-V2-Flash is developed by Xiaomi.

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