How much Codex does ChatGPT Pro include? We priced the weekly limit in dollars

Q: When do Codex usage limits reset?

Codex has two separate windows. The 5-hour window resets 5 hours after it opens; the weekly window resets about 7 days after its first request, not on a fixed day. The ChatGPT usage dashboard and /status in Codex CLI show the exact reset time, and Plus and Pro users can buy extra credits if they run out first.

Updated October 10, 2026 · first published September 27, 2026

Quick answer: A full weekly Codex window on ChatGPT Plus has been worth a median $67 of API-priced usage since August 2026. OpenAI sells Pro as 5x and 20x the Plus allowance, which projects to about $335 a week on...

A full weekly Codex window on ChatGPT Plus has been worth a median $67 of API-priced usage since August 2026. OpenAI sells Pro as 5x and 20x the Plus allowance, which projects to about $335 a week on Pro 5x ($100) and about $1,340 a week on Pro 20x ($200). Those Pro figures hold only if the weekly window scales as far as the 5-hour one, and there is a simple way to check that yourself.

This page answers one question from our full 60-day study of ChatGPT Pro and Codex against Claude Max: how much Codex a ChatGPT plan really gives you. The numbers come from 27 measured weekly Codex windows, priced at the OpenAI API list price in force on the day of each request.

How do Codex usage limits work?

Two rolling windows, one of 5 hours and one of a week, spent in tokens rather than messages. Codex shows each window as a percentage used, and a run stops when either one reaches 100%. How fast you use it depends on the model, how much context the session holds, how hard the model reasons and how many tools it calls. A long session in a large repository costs more per turn than a fresh one.

Because Codex logs the percentage alongside every request, you can price a window in dollars. Divide the API cost of the requests by the percentage points they used, then multiply by 100.

When do Codex usage limits reset?

The 5-hour window resets 5 hours after it opens, and the weekly window about 7 days after its first request, not on a fixed calendar day. A new weekly period starts with your first Codex request after the last one ended, so two users on the same plan reset on different days. The two windows are checked separately: a fresh 5-hour window does not help if the weekly gauge is at 100%.

Check your reset time in the ChatGPT usage dashboard, or run /status in Codex CLI.
Hit the limit early? Plus and Pro users can buy extra credits instead of waiting for the reset.
“Will Codex reset early?” OpenAI has granted one-off weekly resets to paid users, but they are occasional and announced by OpenAI, not something you can schedule around. See our Codex reset log for every recent one and how banked resets work.

How much is a week of Codex on ChatGPT Plus worth?

$67 at API prices since August 2026, and $115 before that. The last seven weekly windows we measured all fell between $61 and $81.

Each dot is one weekly window. Value = 100 × API-dollars spent ÷ percentage points of the weekly gauge consumed; dot size is how much of the window was used (windows under 30pp excluded). The August drop tracks the price list more than the quota: GPT-5.6 Sol lists at $2/$10 against $5/$30 for GPT-5.5.

Month	Codex API-equivalent $ (Plus, $20)	Multiple of the fee
Jun 2026	$302	15x
Jul 2026	$736	37x
Aug 2026	$640	32x

Did Codex limits get smaller in August?

Probably not. The tokens got cheaper. In August the default Codex model moved from GPT-5.5, listed at $5 input and $30 output per million tokens, to Sol at $2 and $10. If the weekly quota tracks compute, cheaper tokens mean fewer dollars per window for the same amount of work.

ChatGPT Plus vs Pro: how much more Codex do Pro 5x and Pro 20x include?

About $335 a week on Pro 5x and about $1,340 a week on Pro 20x, projected. We haven’t run the Pro plans. These are the measured $67 Plus week multiplied by OpenAI’s published 5x and 20x.

Plan	Price / month	Codex API $ per week	Basis
ChatGPT Plus	$20	$67	Measured
ChatGPT Pro 5x	$100	~$335	Plus × 5, projected
ChatGPT Pro 20x	$200	~$1,340	Plus × 20, projected

One caution comes from the other side of the market. Anthropic also labels its $200 plan 20x, and there the weekly limit turned out to be only about 1.5 to 2 times the $100 plan’s. OpenAI’s weekly window may scale fully, or it may not.

How can you check whether Pro 20x really gives 20x per week?

Watch the weekly gauge during your first week. A full Plus week is one twentieth of a full Pro 20x week, or 5 percentage points. A full, Plus-sized day of work should therefore move the Pro 20x weekly gauge by about 1 point. If it moves by 3 or 4, your real weekly multiplier is closer to 5x than 20x.

Is Codex on ChatGPT Pro better value than Claude Max?

At $200, yes, by about 2.4x on finished coding tasks, provided the weekly multiplier holds above about 7x. Claude Max 20x holds more API value per week, at about $1.86k. But GPT-6 Sol needed 3.3 times (DataCamp) to 4.2 times (codeongrass) fewer dollars than Claude to finish the same job. At $100, Claude Max 5x and ChatGPT Pro 5x come out close to even. The full study has the tasks-per-week table and the break-even chart.

Availability varies, too. buildthisnow reports that new sign-ups to the $200 Pro tier have been paused since 10 September 2026.

New: 12 days of real Codex Pro $100 logs

We logged every token of a heavy Codex fortnight and published the data. A full Pro $100 week was worth $175 at API prices, so the real multiplier is 2.6x Plus, not 5x. Using global and banked resets we got 8 weekly windows in 12 days, worth $1,211 of API usage. We also worked out when to redeem a banked reset and why 98% of the input was cached. Every article ships its CSV.

Sources

Frequently asked questions

How much Codex usage does ChatGPT Plus include per week?

A full weekly Codex window on Plus was worth a median $67 at API list prices from August 2026, after the default model moved to cheaper GPT-6 Sol tokens. Before that it was about $115.

How much Codex does ChatGPT Pro 20x include?

About $1,340 of API-priced usage a week, projected as 20 times a measured $67 Plus week. Pro 5x projects to about $335. Both assume the weekly window scales like the 5-hour one.

Is ChatGPT Pro worth it for Codex?

Only if you run out of the Plus weekly window most weeks. A full Plus week of Codex was worth a median $67 at API prices; Pro 5x projects to about $335 a week and Pro 20x to about $1,340, if the weekly window scales like the 5-hour one. If Plus rarely runs out, Pro buys headroom you will not use.

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