Claude Code Pro vs OpenAI Codex Plus limits

	Claude Code Pro	OpenAI Codex Plus
Price	$20/mo monthly; $17/mo billed annually ($200 up front)	$20/mo
Stated limits	At least 5x Free usage per 5-hour session; weekly limits apply; exact count not disclosed	Estimated local messages per 5h: GPT-6.1 Sol 15-160; GPT-6 Sol 15-150; GPT-6 Astra 5-45; GPT-6 Luna 350-3,000. Weekly limits may also apply
Window	5-hour + weekly	5-hour + weekly
Models	Opus, Sonnet, Haiku; Fable via usage credits	GPT-6.1 Sol, GPT-6 Luna (plus GPT-6 Sol/Astra per limits table)
How limits work	Rolling 5-hour session window plus weekly limits on paid plans; one pool shared across Claude apps and Claude Code. No fixed message count published.	Local messages per 5-hour period (published as ranges per model for Plus/Business) plus weekly limits; Pro plans currently have no 5-hour limit. Extra usage via ChatGPT credits.
Source	claude.com checked 2026-10-19	learn.chatgpt.com checked 2026-10-19

Limits are as stated by each vendor; we don't estimate undisclosed numbers. Not sure? Try the plan calculator.