Model Comparison
GPT-5.1 vs MiMo-V2-FlashWhich is better in 2026?
GPT-5.1 shows notably better performance in the majority of benchmarks. MiMo-V2-Flash is 22.9x cheaper per token.
Verdict: GPT-5.1 vs MiMo-V2-Flash — which is better?
GPT-5.1 (by OpenAI) 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.
GPT-5.1 outperforms in 2 benchmarks (GPQA, SWE-Bench Verified), while MiMo-V2-Flash is better at 1 benchmark (AIME 2025). GPT-5.1 shows notably better performance in the majority of benchmarks.
On price, MiMo-V2-Flash is roughly 22.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-5.1 also accepts a larger context window (400,000 input tokens), making it the stronger choice for long documents and large codebases.
Choose GPT-5.1 if…
- you want the strongest raw capability — it leads on 2 of 3 shared benchmarks
- you process long inputs — it offers a 400,000 token context window
Choose MiMo-V2-Flash if…
- cost matters — it's about 22.9x cheaper per token
- you want the most recent training data — it shipped Dec 2025
- you need open weights you can self-host or fine-tune
Performance Benchmarks
Comparative analysis across standard metrics
GPT-5.1 outperforms in 2 benchmarks (GPQA, SWE-Bench Verified), while MiMo-V2-Flash is better at 1 benchmark (AIME 2025).
GPT-5.1 shows notably better performance in the majority of benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5.1 ($1.25/1M tokens) is 12.5x more expensive than MiMo-V2-Flash ($0.10/1M tokens).
For output processing, GPT-5.1 ($10.00/1M tokens) is 33.3x more expensive than MiMo-V2-Flash ($0.30/1M tokens).
In conclusion, GPT-5.1 is more expensive than MiMo-V2-Flash.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5.1 accepts 400,000 input tokens compared to MiMo-V2-Flash's 256,000 tokens. GPT-5.1 can generate longer responses up to 128,000 tokens, while MiMo-V2-Flash is limited to 16,384 tokens.
Input Capabilities
Supported data types and modalities
GPT-5.1 supports multimodal inputs, whereas MiMo-V2-Flash does not.
GPT-5.1 can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-5.1
MiMo-V2-Flash
License
Usage and distribution terms
GPT-5.1 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.
Proprietary
Closed source
MIT
Open weights
Release Timeline
When each model was launched
GPT-5.1 was released on 2025-11-13, while MiMo-V2-Flash was released on 2025-12-16.
MiMo-V2-Flash is 1 month newer than GPT-5.1.
Nov 13, 2025
8 months ago
Dec 16, 2025
7 months ago
1mo newerKnowledge Cutoff
When training data ends
GPT-5.1 has a documented knowledge cutoff of 2024-09-30, while MiMo-V2-Flash's cutoff date is not specified.
We can confirm GPT-5.1's training data extends to 2024-09-30, but cannot make a direct comparison without MiMo-V2-Flash's cutoff date.
Sep 2024
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Provider Availability
GPT-5.1 is available from OpenAI. MiMo-V2-Flash is available from Xiaomi.
GPT-5.1
MiMo-V2-Flash
Outputs Comparison
Key Takeaways
GPT-5.1
View detailsOpenAI
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against GPT-5.1 and MiMo-V2-Flash side-by-side, then vote on the output you prefer.
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FAQ
Common questions about GPT-5.1 vs MiMo-V2-Flash.