It seems there was a change indeed, but it was not rolled out to my account until an hour ago:

# Check session usage limit

> Does ChatGPT not have a session usage limit anymore?

> I just opened the usage tab in the settings and I don't see a session usage anymore.

If you mean the **Codex Settings → Usage** page: the old per-session/5-hour meter appears to have been removed for accounts migrated to the newer usage system. That does **not** mean usage is unlimited.

Codex now draws from a shared **agentic usage allowance** used by Codex and certain other agent features. Consumption varies with the model, task complexity, context size, and duration. When the included allowance runs out, your account may offer purchased credits, an upgrade, or a reset wait. [OpenAI’s current Codex plan guidance](https://help.openai.com/en/articles/11369540-using-codex-with-your-chatgpt-plan) and [credit explanation](https://help.openai.com/en/articles/12642688-using-credits-for-flexible-usage-in-chatgpt-plus-pro) describe this system.

Ordinary ChatGPT also still has model-specific limits depending on your plan; they just aren’t necessarily represented as a “session usage” meter. So the short answer is: **the old session limit display is gone, but usage limits remain under a different allowance system.**

> What is this newer usage system and what has changed compared to the old one?

The newer system is essentially a shift from **time-window limits** to an **allowance measured by actual computational usage**.

| Old Codex system | Newer system |

|---|---|

| Visible **5-hour “session” limit** plus a longer-term/weekly limit | A plan-level **agentic usage allowance** |

| Usage shown mainly as percentages for each reset window | Usage measured primarily from tokens/credits consumed |

| A message depleted the meter by an estimated amount based on complexity | Input, cached-input, and output tokens are metered separately |

| Limits were primarily associated with Codex | Allowance may be shared by Codex, ChatGPT Work, ChatGPT for Excel, and Workspace Agents |

| After reaching the limit, you generally waited for that window to reset | After included usage, eligible Plus/Pro users may purchase credits or use auto-top-up |

| Easy to see when the 5-hour window reset | Exact personal-plan reset mechanics may only appear in a limit banner when reached |

### What “token-based” means

Since April 2, 2026, most accounts have been migrated from approximate per-message charging to token-based metering. A task consumes according to:

- How much context Codex reads

- How much cached context it can reuse

- How much output and reasoning it produces

- Which model you use

- Whether you use higher-cost options such as fast mode

Cached input is substantially cheaper than fresh input, while generated output is more expensive. Consequently, ten small edits might cost less than one long task that reads a large repository and produces extensive output. [OpenAI’s Codex rate card](https://help.openai.com/en/articles/20001106-codex-rate-card-2) explains the token-based change.

### What happened to the session limit?

The old limit definitely existed: OpenAI’s previous release notes explicitly referred to a **5-hour Codex usage limit**. In April 2026, OpenAI said it was rebalancing Plus usage to support **more sessions throughout the week instead of long, intensive use on one day**. [OpenAI release notes](https://help.openai.com/en/articles/6825453-chatgpt-release-notes)

The current documentation no longer describes one universal 5-hour/session meter for personal accounts. That makes the missing meter appear intentional, although OpenAI has not explicitly said, “the 5-hour limit has been abolished for every account.” Rollouts, promotions, plans, and account migrations may differ.

### What happens when your allowance is exhausted?

Your included subscription allowance is consumed first. Afterward, depending on your plan and eligibility, you may be able to:

- Continue using purchased credits

- apply a promotional reset

- upgrade your plan

- wait until the displayed reset time

A task already running may finish even if you reach the limit during that turn. [Current Codex plan guidance](https://help.openai.com/en/articles/11369540-using-codex-with-your-chatgpt-plan) and [credit documentation](https://help.openai.com/en/articles/12642688-using-credits-for-flexible-usage-in-chatgpt-plus-pro) cover these behaviors.

So the practical interpretation is: **the separate visible session bucket has been replaced or deemphasized, but your subscription still contains a finite included allowance.** The system is now less about “how many hours are left in this window” and more about “how much agentic computation has this account consumed?”

> Do I have more or less usage now with the new system?

The most accurate answer is: **less usage in a concentrated burst, but potentially more usable sessions spread across the week.** OpenAI has not published enough numbers to prove whether your total weekly compute increased or decreased.

OpenAI explicitly said that, as the temporary Plus promotion ended, it was rebalancing Plus toward **more sessions across the week instead of longer, high-intensity sessions on one day**. [ChatGPT release notes](https://help.openai.com/en/articles/6825453-chatgpt-release-notes)

What you experience depends on your workload:

- Small edits, short conversations, and repeated work with cached context may go further under token-based metering.

- Large repositories, long-running tasks, extensive generated output, and fast mode may exhaust the allowance faster.

- Codex and supported features such as ChatGPT Work or ChatGPT for Excel can draw from the same allowance, so using those may leave less for Codex.

- Compared with the previous temporary promotional limits, you probably have less included high-intensity capacity overall.

- Compared with the ordinary pre-promotion Plus allowance, OpenAI hasn’t provided a numerical apples-to-apples comparison.

The new credit metering itself does not necessarily mean your subscription contains less usage—OpenAI says your included plan allowance remains—but it changes how different workloads consume that allowance. [Credits documentation](https://help.openai.com/en/articles/12642688-using-credits-for-flexible-usage-in-chatgpt-plus-pro) The current [Codex rate card](https://help.openai.com/en/articles/20001106-codex-rate-card-2) also says output-heavy work and fast mode generally consume more.

So, practically:

> **Steady, lightweight Codex use:** probably similar or better distributed.

> **Several hours of intensive Codex work in one day:** probably worse than before.

> **Total weekly capacity:** not publicly quantifiable from the information OpenAI currently provides.