Model Comparison

GPT-5.5 vs MiMo-V2-OmniWhich is better in 2026?

MiMo-V2-Omni significantly outperforms across most benchmarks. MiMo-V2-Omni is 14.1x cheaper per token.

Verdict: GPT-5.5 vs MiMo-V2-Omni — which is better?

GPT-5.5 (by OpenAI) 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.

GPT-5.5 outperforms in 0 benchmarks, while MiMo-V2-Omni is better at 1 benchmark (GDPval-AA). MiMo-V2-Omni significantly outperforms across most benchmarks.

On price, MiMo-V2-Omni is roughly 14.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GPT-5.5 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 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-Omni if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • cost matters — it's about 14.1x cheaper per token

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

GPT-5.5 outperforms in 0 benchmarks, while MiMo-V2-Omni is better at 1 benchmark (GDPval-AA).

MiMo-V2-Omni 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, GPT-5.5 ($5.00/1M tokens) is 12.5x more expensive than MiMo-V2-Omni ($0.40/1M tokens).

For output processing, GPT-5.5 ($30.00/1M tokens) is 15.0x more expensive than MiMo-V2-Omni ($2.00/1M tokens).

In conclusion, GPT-5.5 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
OpenAI
GPT-5.5
Input tokens$5.00
Output tokens$30.00
Best providerOpenAI
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

GPT-5.5 accepts 1,050,000 input tokens compared to MiMo-V2-Omni's 262,000 tokens. GPT-5.5 can generate longer responses up to 128,000 tokens, while MiMo-V2-Omni is limited to 16,384 tokens.

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

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

GPT-5.5

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.

GPT-5.5

Proprietary

Closed source

MiMo-V2-Omni

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5.5 was released on 2026-04-23, while MiMo-V2-Omni was released on 2026-03-18.

GPT-5.5 is 1 month newer than MiMo-V2-Omni.

GPT-5.5

Apr 23, 2026

2 months ago

1mo newer
MiMo-V2-Omni

Mar 18, 2026

4 months ago

Knowledge Cutoff

When training data ends

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

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

GPT-5.5

Dec 2025

MiMo-V2-Omni

—

Provider Availability

GPT-5.5 is available from OpenAI. MiMo-V2-Omni is available from Xiaomi.

GPT-5.5

openai logo
OpenAI
Input Price:Input: $5.00/1MOutput Price:Output: $30.00/1M

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

OpenAI
Larger context window (1,050,000 tokens)
Xiaomi
Less expensive input tokens
Less expensive output tokens
Higher GDPval-AA score (47.0% vs 37.8%)

Detailed Comparison

Interactive Arena

Judge for yourself.

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

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

FAQ

Common questions about GPT-5.5 vs MiMo-V2-Omni.

Which is better, GPT-5.5 or MiMo-V2-Omni?

MiMo-V2-Omni significantly outperforms across most benchmarks. GPT-5.5 is made by OpenAI 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 GPT-5.5 compare to MiMo-V2-Omni in benchmarks?

GPT-5.5 scores Tau2 Telecom: 98.0%, ARC-AGI: 95.0%, GPQA: 93.6%, ARC-AGI v2: 85.0%, GDPval-MM: 84.9%. MiMo-V2-Omni scores PinchBench: 81.2%, SWE-Bench Verified: 74.8%, Claw-Eval: 54.8%, MM-BrowserComp: 52.0%, OmniGAIA: 49.8%.

Is GPT-5.5 cheaper than MiMo-V2-Omni?

MiMo-V2-Omni is 12.5x cheaper for input tokens. GPT-5.5 costs $5.00/M input and $30.00/M output via openai. MiMo-V2-Omni costs $0.40/M input and $2.00/M output via xiaomi.

What are the context window sizes for GPT-5.5 and MiMo-V2-Omni?

GPT-5.5 supports 1.1M 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 GPT-5.5 and MiMo-V2-Omni?

Key differences include context window (1.1M vs 262K), input pricing ($5.00 vs $0.40/M). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5.5 and MiMo-V2-Omni?

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

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