GPT-4.5 vs MiMo-V2-Omni

Compare GPT-4.5 by OpenAI against MiMo-V2-Omni by Xiaomi, context windows of 128K vs 262K, tested across 24 shared challenges. Updated March 2026.

Which is better, GPT-4.5 or MiMo-V2-Omni?

GPT-4.5 and MiMo-V2-Omni are both competitive models. GPT-4.5 costs $75/M input tokens vs $0.4/M for MiMo-V2-Omni. Context windows: 128K vs 262K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-4.5 and MiMo-V2-Omni

GPT-4.5 is made by openai while MiMo-V2-Omni is from xiaomi. GPT-4.5 has a 128K token context window compared to MiMo-V2-Omni's 262K. On pricing, GPT-4.5 costs $75/M input tokens vs $0.4/M for MiMo-V2-Omni.

Our Verdict
GPT-4.5
GPT-4.5
MiMo-V2-Omni
MiMo-V2-Omni

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

MiMo-V2-Omni is 75x cheaper per token — worth considering if cost matters.

Too close to call
vs

Ask them anything yourself

GPT-4.5MiMo-V2-Omni
FAQ