Model Comparison

Grok 4.5 vs MiMo-V2-FlashWhich is better in 2026?

Grok 4.5 significantly outperforms across most benchmarks. MiMo-V2-Flash is 20.0x cheaper per token.

Verdict: Grok 4.5 vs MiMo-V2-Flash — which is better?

Grok 4.5 (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 4.5 outperforms in 1 benchmarks (GPQA), while MiMo-V2-Flash is better at 0 benchmarks. Grok 4.5 significantly outperforms across most benchmarks.

On price, MiMo-V2-Flash is roughly 20.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Grok 4.5 also accepts a larger context window (500,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose Grok 4.5 if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you process long inputs — it offers a 500,000 token context window
  • you want the most recent training data — it shipped Jul 2026

Choose MiMo-V2-Flash if…

  • cost matters — it's about 20.0x cheaper per token
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Grok 4.5 outperforms in 1 benchmarks (GPQA), while MiMo-V2-Flash is better at 0 benchmarks.

Grok 4.5 significantly outperforms across most benchmarks.

Wed Jul 22 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 4.5 ($2.00/1M tokens) is 20.0x more expensive than MiMo-V2-Flash ($0.10/1M tokens).

For output processing, Grok 4.5 ($6.00/1M tokens) is 20.0x more expensive than MiMo-V2-Flash ($0.30/1M tokens).

In conclusion, Grok 4.5 is more expensive than MiMo-V2-Flash.*

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

Lowest available price from all providers
Wed Jul 22 2026 • llm-stats.com
xAI
Grok 4.5
Input tokens$2.00
Output tokens$6.00
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

Grok 4.5 accepts 500,000 input tokens compared to MiMo-V2-Flash's 256,000 tokens. Only MiMo-V2-Flash specifies output context (16,384 tokens).

xAI
Grok 4.5
Input500,000 tokens
Output- tokens
Xiaomi
MiMo-V2-Flash
Input256,000 tokens
Output16,384 tokens
Wed Jul 22 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Grok 4.5 supports multimodal inputs, whereas MiMo-V2-Flash does not.

Grok 4.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Grok 4.5

Text
Images
Audio
Video

MiMo-V2-Flash

Text
Images
Audio
Video

License

Usage and distribution terms

Grok 4.5 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 4.5

Proprietary

Closed source

MiMo-V2-Flash

MIT

Open weights

Release Timeline

When each model was launched

Grok 4.5 was released on 2026-07-16, while MiMo-V2-Flash was released on 2025-12-16.

Grok 4.5 is 7 months newer than MiMo-V2-Flash.

Grok 4.5

Jul 16, 2026

5 days ago

7mo newer
MiMo-V2-Flash

Dec 16, 2025

7 months ago

Knowledge Cutoff

When training data ends

Grok 4.5 has a documented knowledge cutoff of 2026-02-01, while MiMo-V2-Flash's cutoff date is not specified.

We can confirm Grok 4.5's training data extends to 2026-02-01, but cannot make a direct comparison without MiMo-V2-Flash's cutoff date.

Grok 4.5

Feb 2026

MiMo-V2-Flash

—

Provider Availability

Grok 4.5 is available from xAI. MiMo-V2-Flash is available from Xiaomi.

Grok 4.5

xai logo
xAI
Input Price:Input: $2.00/1MOutput Price:Output: $6.00/1M

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

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

xAI
Larger context window (500,000 tokens)
Supports multimodal inputs
Higher GPQA score (93.0% vs 83.7%)
Xiaomi
Less expensive input tokens
Less expensive output tokens
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Grok 4.5 and MiMo-V2-Flash side-by-side, then vote on the output you prefer.

Grok 4.5
✓ Preferred
MiMo-V2-Flash
Open in Playground
AI Model Comparison Table
Feature
xAI
Grok 4.5
Xiaomi
MiMo-V2-Flash

FAQ

Common questions about Grok 4.5 vs MiMo-V2-Flash.

Which is better, Grok 4.5 or MiMo-V2-Flash?

Grok 4.5 significantly outperforms across most benchmarks. Grok 4.5 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 4.5 compare to MiMo-V2-Flash in benchmarks?

Grok 4.5 scores GPQA: 93.0%, Terminal-Bench 2.1: 83.3%, Artificial Analysis Coding Agent Index v1.1: 76.0%, SWE-Bench Pro: 64.7%, AA-Omniscience Index: 63.0%. 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 4.5 cheaper than MiMo-V2-Flash?

MiMo-V2-Flash is 20.0x cheaper for input tokens. Grok 4.5 costs $2.00/M input and $6.00/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 4.5 and MiMo-V2-Flash?

Grok 4.5 supports 500K 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 4.5 and MiMo-V2-Flash?

Key differences include context window (500K vs 256K), input pricing ($2.00 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 4.5 and MiMo-V2-Flash?

Grok 4.5 is developed by xAI and MiMo-V2-Flash is developed by Xiaomi.

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