What is the difference between GPT-5.3-Codex and MiMo-V2-Pro?

GPT-5.3-Codex is developed by OpenAI while MiMo-V2-Pro is developed by Xiaomi. GPT-5.3-Codex has a 400K token context window vs MiMo-V2-Pro's 1.0M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.3-Codex or MiMo-V2-Pro?

It depends on your use case. GPT-5.3-Codex and MiMo-V2-Pro each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does GPT-5.3-Codex cost compared to MiMo-V2-Pro?

GPT-5.3-Codex costs $1.75/M input tokens and MiMo-V2-Pro costs $1/M input tokens. MiMo-V2-Pro is $0.75/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare GPT-5.3-Codex and MiMo-V2-Pro on Rival?

This page shows a side-by-side comparison of GPT-5.3-Codex and MiMo-V2-Pro across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

Updated Mar 2026

GPT-5.3-CodexvsMiMo-V2-Pro

MiMo-V2-Pro is cheaper than GPT-5.3-Codex at $1/M vs $1.75/M input tokens.

GPT-5.3-Codex and MiMo-V2-Pro compared across 53 shared prompts
Spec	GPT-5.3-Codex	MiMo-V2-Pro
Input price	$1.75/M tokens	$1/M tokens
Output price	$14/M tokens	$3/M tokens
Context window	400K tokens	1.0M tokens
Weights	Closed	—
Free API (OpenRouter)	No	No
Released	Feb 2026	Mar 2026