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GPT-5.5 vs MiMo V2

Both models are evenly matched

Arena ELO

Tie

Cheaper

GPT-5.5

Faster

MiMo V2

Detailed Comparison

CategoryGPT-5.5MiMo V2
ProviderOpenAI Xiaomi
Context Window128K 256K WIN
Input Price ($/1M)$5 WINN/A
Output Price ($/1M)$30 WINN/A
Arena ELON/A N/A
CodingN/A unknown
ReasoningN/A unknown
Speed (tokens/sec)N/A ~70 t/s WIN
Open SourceNo Yes

Frequently Asked Questions

Which is better for coding, GPT-5.5 or MiMo V2?

GPT-5.5 scores N/A on coding benchmarks, while MiMo V2 scores unknown.

Which has a larger context window?

GPT-5.5 supports 128K context, while MiMo V2 supports 256K.

Is GPT-5.5 or MiMo V2 open source?

GPT-5.5 is proprietary. MiMo V2 is open source.