GPT-5.3-Codex vs MiniMax H3

GPT-5.3-Codex leads in 3 of 8 categories

Arena ELO

Tie

Cheaper

GPT-5.3-Codex

Faster

Tie

Detailed Comparison

Category	GPT-5.3-Codex	MiniMax H3
Provider	OpenAI	MiniMax
Context Window	128K WIN	uncertain
Input Price ($/1M)	$1.75 WIN	N/A
Output Price ($/1M)	$14 WIN	N/A
Arena ELO	N/A	N/A
Coding	N/A	N/A
Reasoning	N/A	N/A
Speed (tokens/sec)	N/A	N/A
Open Source	No	No

Frequently Asked Questions

Which has a larger context window?

GPT-5.3-Codex supports 128K context, while MiniMax H3 supports uncertain.

Is GPT-5.3-Codex or MiniMax H3 open source?

GPT-5.3-Codex is proprietary. MiniMax H3 is proprietary.

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