Model Comparison

GPT-5.5 Pro vs MiMo-V2.5Which is better in 2026?

Comparing GPT-5.5 Pro and MiMo-V2.5 across benchmarks, pricing, and capabilities.

Verdict: GPT-5.5 Pro vs MiMo-V2.5 — which is better?

GPT-5.5 Pro (by OpenAI) 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.

On price, MiMo-V2.5 is roughly 321.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GPT-5.5 Pro also accepts a larger context window (1,050,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose GPT-5.5 Pro if…

  • you process long inputs — it offers a 1,050,000 token context window
  • you want the most recent training data — it shipped Apr 2026

Choose MiMo-V2.5 if…

  • cost matters — it's about 321.4x cheaper per token
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

GPT-5.5 Pro and MiMo-V2.5don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

MiMo-V2.5 costs less

For input processing, GPT-5.5 Pro ($30.00/1M tokens) is 178.6x more expensive than MiMo-V2.5 ($0.17/1M tokens).

For output processing, GPT-5.5 Pro ($180.00/1M tokens) is 535.7x more expensive than MiMo-V2.5 ($0.34/1M tokens).

In conclusion, GPT-5.5 Pro 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
OpenAI
GPT-5.5 Pro
Input tokens$30.00
Output tokens$180.00
Best providerOpenAI
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

GPT-5.5 Pro accepts 1,050,000 input tokens compared to MiMo-V2.5's 1,048,576 tokens. MiMo-V2.5 can generate longer responses up to 131,072 tokens, while GPT-5.5 Pro is limited to 128,000 tokens.

OpenAI
GPT-5.5 Pro
Input1,050,000 tokens
Output128,000 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 GPT-5.5 Pro and MiMo-V2.5 support multimodal inputs.

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

GPT-5.5 Pro

Text
Images
Audio
Video

MiMo-V2.5

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-5.5 Pro 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.

GPT-5.5 Pro

Proprietary

Closed source

MiMo-V2.5

MIT

Open weights

Release Timeline

When each model was launched

GPT-5.5 Pro was released on 2026-04-23, while MiMo-V2.5 was released on 2026-04-22.

GPT-5.5 Pro is 0 month newer than MiMo-V2.5.

GPT-5.5 Pro

Apr 23, 2026

2 months ago

1d newer
MiMo-V2.5

Apr 22, 2026

2 months ago

Knowledge Cutoff

When training data ends

GPT-5.5 Pro has a documented knowledge cutoff of 2025-12-01, while MiMo-V2.5's cutoff date is not specified.

We can confirm GPT-5.5 Pro's training data extends to 2025-12-01, but cannot make a direct comparison without MiMo-V2.5's cutoff date.

GPT-5.5 Pro

Dec 2025

MiMo-V2.5

—

Provider Availability

GPT-5.5 Pro is available from OpenAI. MiMo-V2.5 is available from Novita, DeepInfra.

GPT-5.5 Pro

openai logo
OpenAI
Input Price:Input: $30.00/1MOutput Price:Output: $180.00/1M

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

OpenAI
Larger context window (1,050,000 tokens)
Xiaomi
Less expensive input tokens
Less expensive output tokens
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GPT-5.5 Pro and MiMo-V2.5 side-by-side, then vote on the output you prefer.

GPT-5.5 Pro
✓ Preferred
MiMo-V2.5
Open in Playground
AI Model Comparison Table
Feature
OpenAI
GPT-5.5 Pro
Xiaomi
MiMo-V2.5

FAQ

Common questions about GPT-5.5 Pro vs MiMo-V2.5.

Which is better, GPT-5.5 Pro or MiMo-V2.5?

GPT-5.5 Pro (OpenAI) and MiMo-V2.5 (Xiaomi) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does GPT-5.5 Pro compare to MiMo-V2.5 in benchmarks?

GPT-5.5 Pro scores BrowseComp: 90.1%, GDPval-MM: 82.3%, Humanity's Last Exam: 57.2%, FrontierMath: 39.6%, GeneBench: 33.2%. MiMo-V2.5 scores HR-Bench (4k): 88.5%, Video-MME: 87.7%, OmniDocBench: 87.2%, GraphWalks: 87.0%, DailyOmni: 83.5%.

Is GPT-5.5 Pro cheaper than MiMo-V2.5?

MiMo-V2.5 is 178.6x cheaper for input tokens. GPT-5.5 Pro costs $30.00/M input and $180.00/M output via openai. MiMo-V2.5 costs $0.17/M input and $0.34/M output via novita.

What are the context window sizes for GPT-5.5 Pro and MiMo-V2.5?

GPT-5.5 Pro supports 1.1M 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 GPT-5.5 Pro and MiMo-V2.5?

Key differences include context window (1.1M vs 1.0M), input pricing ($30.00 vs $0.17/M), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5.5 Pro and MiMo-V2.5?

GPT-5.5 Pro is developed by OpenAI and MiMo-V2.5 is developed by Xiaomi.

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