Model Comparison

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

Grok 4.5 significantly outperforms across most benchmarks. MiMo-V2-Omni is 3.8x cheaper per token.

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

Grok 4.5 (by xAI) and MiMo-V2-Omni (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 (GDPval-AA), while MiMo-V2-Omni is better at 0 benchmarks. Grok 4.5 significantly outperforms across most benchmarks.

On price, MiMo-V2-Omni is roughly 3.8x 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-Omni if…

  • cost matters — it's about 3.8x cheaper per token

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Grok 4.5 outperforms in 1 benchmarks (GDPval-AA), while MiMo-V2-Omni is better at 0 benchmarks.

Grok 4.5 significantly outperforms across most benchmarks.

Fri Jul 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

MiMo-V2-Omni costs less

For input processing, Grok 4.5 ($2.00/1M tokens) is 5.0x more expensive than MiMo-V2-Omni ($0.40/1M tokens).

For output processing, Grok 4.5 ($6.00/1M tokens) is 3.0x more expensive than MiMo-V2-Omni ($2.00/1M tokens).

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

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

Lowest available price from all providers
Fri Jul 17 2026 • llm-stats.com
xAI
Grok 4.5
Input tokens$2.00
Output tokens$6.00
Best providerxAI
Xiaomi
MiMo-V2-Omni
Input tokens$0.40
Output tokens$2.00
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-Omni's 262,000 tokens. Only MiMo-V2-Omni specifies output context (16,384 tokens).

xAI
Grok 4.5
Input500,000 tokens
Output- tokens
Xiaomi
MiMo-V2-Omni
Input262,000 tokens
Output16,384 tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Grok 4.5 and MiMo-V2-Omni support multimodal inputs.

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

Grok 4.5

Text
Images
Audio
Video

MiMo-V2-Omni

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 4.5

Proprietary

Closed source

MiMo-V2-Omni

Proprietary

Closed source

Release Timeline

When each model was launched

Grok 4.5 was released on 2026-07-08, while MiMo-V2-Omni was released on 2026-03-18.

Grok 4.5 is 4 months newer than MiMo-V2-Omni.

Grok 4.5

Jul 8, 2026

1 weeks ago

3mo newer
MiMo-V2-Omni

Mar 18, 2026

4 months ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

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

Grok 4.5

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

MiMo-V2-Omni

xiaomi logo
Xiaomi
Input Price:Input: $0.40/1MOutput Price:Output: $2.00/1M
* 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)
Higher GDPval-AA score (51.4% vs 47.0%)
Xiaomi
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

Interactive Arena

Judge for yourself.

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

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

FAQ

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

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

Grok 4.5 significantly outperforms across most benchmarks. Grok 4.5 is made by xAI and MiMo-V2-Omni 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-Omni 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-Omni scores PinchBench: 81.2%, SWE-Bench Verified: 74.8%, Claw-Eval: 54.8%, MM-BrowserComp: 52.0%, OmniGAIA: 49.8%.

Is Grok 4.5 cheaper than MiMo-V2-Omni?

MiMo-V2-Omni is 5.0x cheaper for input tokens. Grok 4.5 costs $2.00/M input and $6.00/M output via xai. MiMo-V2-Omni costs $0.40/M input and $2.00/M output via xiaomi.

What are the context window sizes for Grok 4.5 and MiMo-V2-Omni?

Grok 4.5 supports 500K tokens and MiMo-V2-Omni supports 262K 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-Omni?

Key differences include context window (500K vs 262K), input pricing ($2.00 vs $0.40/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok 4.5 and MiMo-V2-Omni?

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

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