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Codex はいつリセットされる？
Plus と Business は5時間ウィンドウと週間上限の組み合わせ。Pro の各プランは5時間上限がなく、週間の利用枠を使います。OpenAI が公開しているのは推定範囲で、厳密な上限ではありません。
Codex のプラン別利用上限
$20/月
Plus
$162–253/月~8.1–13×低算出方法
Est. local messages/5h: GPT-6.1 Sol 15-160, GPT-6 Sol 15-150, GPT-6 Astra 5-45 (limited), GPT-6 Luna 350-3,000; weekly limits may apply
5-hour + weekly
Estimates, not fixed limits.
$100/月
Pro 100
$1k–1.4k/月~10–14×低算出方法
No 5-hour limit; included allowance (weekly); relative size vs Plus not stated on official page
Weekly
第三者Third parties report ~5x Plus (unverified officially).
$200/月
Pro 200
$2.1k–2.9k/月~10–14×低算出方法
No 5-hour limit; more than Pro 100; new subs get lower allowance than legacy Pro 200
Weekly
第三者Grandfathered (active Sep 22-29 2026) keep old allowance thr… 詳細
Grandfathered (active Sep 22-29 2026) keep old allowance through Oct 29 2026. ~10x vs 20x Plus is third-party/X-reported.
$500/月
Pro 500
$5.2k–7k/月~10–14×低算出方法
No 5-hour limit; highest included usage; Ultrafast (8x included usage rate, 6x credit rate)
Weekly
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$25/月
Business (Standard seat)
$162–253/月~6.5–10×低算出方法
Same 5-hour estimates as Plus; weekly may apply
5-hour + weekly
$25/user/mo billed monthly; $20/user/mo billed annually (2+ … 詳細
$25/user/mo billed monthly; $20/user/mo billed annually (2+ users), per developers.openai.com/codex/pricing. A $100 Business tier is mentioned on chatgpt.com/codex/pricing, details unknown.
Codex の上限の変更
OpenAI
予定
Upcoming: grandfathered Pro 200 allowance ends (reported 20x -> 10x Plus)
Multipliers from third-party/X post, not official page
OpenAI
GPT-5.5 retired from Codex with ChatGPT sign-in (noon PDT); API unaffected
OpenAI
Pro 200 reopened to new subs with lower allowance; grandfathered (active Sep 22-29) keep old allowance through 2026-10-29; Pro 500 launched
OpenAI
Automatic Codex usage reset for Plus/Pro/Business
OpenAI
Banked Codex resets granted with GPT-6 Astra rollout
ニュースレター
上限が変わったらお知らせ
プランが変わったときに短いメールを1通。スパムは送りません。こちらもレート制限中です。