Model Comparison

Grok 4.5 vs MiMo-V2.5Which is better in 2026?

Grok 4.5 significantly outperforms across most benchmarks. MiMo-V2.5 is 14.3x cheaper per token.

Verdict: Grok 4.5 vs MiMo-V2.5 — which is better?

Grok 4.5 (by xAI) and MiMo-V2.5 (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 (SWE-Bench Pro), while MiMo-V2.5 is better at 0 benchmarks. Grok 4.5 significantly outperforms across most benchmarks.

On price, MiMo-V2.5 is roughly 14.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

MiMo-V2.5 also accepts a larger context window (1,048,576 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 want the most recent training data — it shipped Jul 2026

Choose MiMo-V2.5 if…

  • cost matters — it's about 14.3x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • 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 (SWE-Bench Pro), while MiMo-V2.5 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-V2.5 costs less

For input processing, Grok 4.5 ($2.00/1M tokens) is 11.9x more expensive than MiMo-V2.5 ($0.17/1M tokens).

For output processing, Grok 4.5 ($6.00/1M tokens) is 17.9x more expensive than MiMo-V2.5 ($0.34/1M tokens).

In conclusion, Grok 4.5 is more expensive than MiMo-V2.5.*

* 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-V2.5
Input tokens$0.17
Output tokens$0.34
Best providerNovita
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

MiMo-V2.5 accepts 1,048,576 input tokens compared to Grok 4.5's 500,000 tokens. Only MiMo-V2.5 specifies output context (131,072 tokens).

xAI
Grok 4.5
Input500,000 tokens
Output- tokens
Xiaomi
MiMo-V2.5
Input1,048,576 tokens
Output131,072 tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Grok 4.5 and MiMo-V2.5 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-V2.5

Text
Images
Audio
Video

License

Usage and distribution terms

Grok 4.5 is licensed under a proprietary license, while MiMo-V2.5 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-V2.5

MIT

Open weights

Release Timeline

When each model was launched

Grok 4.5 was released on 2026-07-08, while MiMo-V2.5 was released on 2026-04-22.

Grok 4.5 is 3 months newer than MiMo-V2.5.

Grok 4.5

Jul 8, 2026

1 weeks ago

2mo newer
MiMo-V2.5

Apr 22, 2026

2 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-V2.5 is available from Novita, DeepInfra.

Grok 4.5

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

MiMo-V2.5

novita logo
Novita
Input Price:Input: $0.17/1MOutput Price:Output: $0.34/1M
deepinfra logo
Deepinfra
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
Higher SWE-Bench Pro score (64.7% vs 56.1%)
Xiaomi
Larger context window (1,048,576 tokens)
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-V2.5 side-by-side, then vote on the output you prefer.

Grok 4.5
✓ Preferred
MiMo-V2.5
Open in Playground
AI Model Comparison Table
Feature
xAI
Grok 4.5
Xiaomi
MiMo-V2.5

FAQ

Common questions about Grok 4.5 vs MiMo-V2.5.

Which is better, Grok 4.5 or MiMo-V2.5?

Grok 4.5 significantly outperforms across most benchmarks. Grok 4.5 is made by xAI and MiMo-V2.5 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-V2.5 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-V2.5 scores HR-Bench (4k): 88.5%, Video-MME: 87.7%, OmniDocBench: 87.2%, GraphWalks: 87.0%, DailyOmni: 83.5%.

Is Grok 4.5 cheaper than MiMo-V2.5?

MiMo-V2.5 is 11.9x cheaper for input tokens. Grok 4.5 costs $2.00/M input and $6.00/M output via xai. MiMo-V2.5 costs $0.17/M input and $0.34/M output via novita.

What are the context window sizes for Grok 4.5 and MiMo-V2.5?

Grok 4.5 supports 500K tokens and MiMo-V2.5 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 4.5 and MiMo-V2.5?

Key differences include context window (500K vs 1.0M), input pricing ($2.00 vs $0.17/M), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok 4.5 and MiMo-V2.5?

Grok 4.5 is developed by xAI and MiMo-V2.5 is developed by Xiaomi.

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