Alex Getmanearly AI signals
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Tool guide and updates

Codex

OpenAI's agentic coding environment. Track launches, access, limits, workflows, and the way people actually use it.

Events recorded: 13. to . Newest first.UTC

Limits nowSubscriptions & limits →

OpenAI

ChatGPT Plus

$20/ month

What's included

ChatGPT · Codex · ChatGPT Work

Web · CLI · IDE · Mobile

Usage limits

  • Estimate: 5–45 messagesCodex · Local messages · GPT-6 Astra · 5-hour window
  • Estimate: 15–160 messagesCodex · Local messages · GPT-6.1 Sol · 5-hour window
  • Estimate: 35–285 messagesCodex · Local messages · GPT-6.1 Terra · 5-hour window

All published values and conditions are listed below.

Official estimates, not fixed message quotas. Usage depends on the model and task.

Shared pool: Codex + ChatGPT Work

Official source ↗

Checked:

Terms and access routes

Region not specified by source · Tax treatment not established

ChatGPT: Web ↗

Codex: Web · CLI · IDE · Mobile ↗

ChatGPT Work: Web ↗

Codex + ChatGPT Work · 5-hour window

Codex + ChatGPT Work

Exact amount not published

Reset rule not established

Official source · ↗
Codex · Local messages · GPT-6 Astra · 5-hour window

Codex

Estimate: 5–45 messages

Reset rule not established

Official source · ↗
Codex · Local messages · GPT-6.1 Sol · 5-hour window

Codex

Estimate: 15–160 messages

Reset rule not established

Official source · ↗
Codex · Local messages · GPT-6.1 Terra · 5-hour window

Codex

Estimate: 35–285 messages

Reset rule not established

Official source · ↗
Codex · Local messages · GPT-6 Sol · 5-hour window

Codex

Estimate: 15–150 messages

Reset rule not established

Official source · ↗
Codex · Local messages · GPT-6 Luna · 5-hour window

Codex

Estimate: 350–3,000 messages

Reset rule not established

Official source · ↗

Models and families

Usage depends on the model and task

API billing is separate from signed-in usage

Additional usage credits available

Unlimited everyday text is subject to reasonable use and abuse safeguards. Thinking, Pro models and tools have separate limits; this is not unlimited access to every model.

Total context includes system instructions, tools, memory, internal processing and responses. The space available for your input is smaller and can vary.

These are published plan terms. Your account may have different limits; check it for available usage and reset times.

Other plans for this product
PlanPriceUsage limits
ChatGPT Pro · $100.00$100 / month
  • No 5-hour limitCodex + ChatGPT Work · 5-hour window
ChatGPT Pro · $200.00$200 / month
  • No 5-hour limitCodex + ChatGPT Work · 5-hour window
ChatGPT Pro · $500.00$500 / month
  • No 5-hour limitCodex + ChatGPT Work · 5-hour window
Changes to subscriptions and limits

Recent retained observations, not effective dates. The first observation establishes a baseline; repeated checks without term changes do not create entries.

OpenAI · · Source coverage updated

ChatGPT Plus

Before

$20 / month

Codex: Web, CLI, IDE, Mobile

  • Exact amount not publishedCodex · 5-hour windowReset rule not established
  • Estimate: 5–45 messagesCodex · Local messages · GPT-6 Astra · 5-hour windowReset rule not established
  • Estimate: 15–160 messagesCodex · Local messages · GPT-6.1 Sol · 5-hour windowReset rule not established
  • Estimate: 35–285 messagesCodex · Local messages · GPT-6.1 Terra · 5-hour windowReset rule not established
  • Estimate: 15–150 messagesCodex · Local messages · GPT-6 Sol · 5-hour windowReset rule not established
  • Estimate: 350–3,000 messagesCodex · Local messages · GPT-6 Luna · 5-hour windowReset rule not established

Usage depends on the model and task

API billing is separate from signed-in usage

Additional usage credits available

Region not specified by source · Tax treatment not established

Official source ↗

Codex · 5-hour window ↗

Codex · Local messages · GPT-6 Astra · 5-hour window ↗

Codex · Local messages · GPT-6.1 Sol · 5-hour window ↗

Codex · Local messages · GPT-6.1 Terra · 5-hour window ↗

Codex · Local messages · GPT-6 Sol · 5-hour window ↗

Codex · Local messages · GPT-6 Luna · 5-hour window ↗

Observed terms

$20 / month

Codex: Web, CLI, IDE, Mobile

  • Exact amount not publishedCodex · 5-hour windowReset rule not established
  • Estimate: 5–45 messagesCodex · Local messages · GPT-6 Astra · 5-hour windowReset rule not established
  • Estimate: 15–160 messagesCodex · Local messages · GPT-6.1 Sol · 5-hour windowReset rule not established
  • Estimate: 35–285 messagesCodex · Local messages · GPT-6.1 Terra · 5-hour windowReset rule not established
  • Estimate: 15–150 messagesCodex · Local messages · GPT-6 Sol · 5-hour windowReset rule not established
  • Estimate: 350–3,000 messagesCodex · Local messages · GPT-6 Luna · 5-hour windowReset rule not established

Usage depends on the model and task

API billing is separate from signed-in usage

Additional usage credits available

Unlimited everyday text is subject to reasonable use and abuse safeguards. Thinking, Pro models and tools have separate limits; this is not unlimited access to every model.

Total context includes system instructions, tools, memory, internal processing and responses. The space available for your input is smaller and can vary.

Region not specified by source · Tax treatment not established

Official source ↗

Codex · 5-hour window ↗

Codex · Local messages · GPT-6 Astra · 5-hour window ↗

Codex · Local messages · GPT-6.1 Sol · 5-hour window ↗

Codex · Local messages · GPT-6.1 Terra · 5-hour window ↗

Codex · Local messages · GPT-6 Sol · 5-hour window ↗

Codex · Local messages · GPT-6 Luna · 5-hour window ↗

ChatGPT Pro · $100.00

Before

$100 / month

Codex: Web, CLI, IDE, Mobile

  • No 5-hour limitCodex · 5-hour window
  • Exact amount not publishedCodex · Weekly windowReset rule not established

Usage depends on the model and task

API billing is separate from signed-in usage

Additional usage credits available

Region not specified by source · Tax treatment not established

Official source ↗

Codex · 5-hour window ↗

Codex · Weekly window ↗

Observed terms

$100 / month

Codex: Web, CLI, IDE, Mobile

  • No 5-hour limitCodex · 5-hour window
  • Exact amount not publishedCodex · Weekly windowReset rule not established

Usage depends on the model and task

API billing is separate from signed-in usage

Additional usage credits available

Unlimited everyday text is subject to reasonable use and abuse safeguards. Thinking, Pro models and tools have separate limits; this is not unlimited access to every model.

Total context includes system instructions, tools, memory, internal processing and responses. The space available for your input is smaller and can vary.

Region not specified by source · Tax treatment not established

Official source ↗

Codex · 5-hour window ↗

Codex · Weekly window ↗

ChatGPT Pro · $200.00

Before

$200 / month

Codex: Web, CLI, IDE, Mobile

  • No 5-hour limitCodex · 5-hour window
  • Exact amount not publishedCodex · Weekly windowReset rule not established

Usage depends on the model and task

API billing is separate from signed-in usage

Additional usage credits available

Region not specified by source · Tax treatment not established

Official source ↗

Codex · 5-hour window ↗

Codex · Weekly window ↗

Observed terms

$200 / month

Codex: Web, CLI, IDE, Mobile

  • No 5-hour limitCodex · 5-hour window
  • Exact amount not publishedCodex · Weekly windowReset rule not established

Usage depends on the model and task

API billing is separate from signed-in usage

Additional usage credits available

Unlimited everyday text is subject to reasonable use and abuse safeguards. Thinking, Pro models and tools have separate limits; this is not unlimited access to every model.

Total context includes system instructions, tools, memory, internal processing and responses. The space available for your input is smaller and can vary.

Region not specified by source · Tax treatment not established

Official source ↗

Codex · 5-hour window ↗

Codex · Weekly window ↗

ChatGPT Pro · $500.00

Before

$500 / month

Codex: Web, CLI, IDE, Mobile

  • No 5-hour limitCodex · 5-hour window
  • Exact amount not publishedCodex · Weekly windowReset rule not established

Usage depends on the model and task

API billing is separate from signed-in usage

Additional usage credits available

Region not specified by source · Tax treatment not established

Official source ↗

Codex · 5-hour window ↗

Codex · Weekly window ↗

Observed terms

$500 / month

Codex: Web, CLI, IDE, Mobile

  • No 5-hour limitCodex · 5-hour window
  • Exact amount not publishedCodex · Weekly windowReset rule not established

Usage depends on the model and task

API billing is separate from signed-in usage

Additional usage credits available

Unlimited everyday text is subject to reasonable use and abuse safeguards. Thinking, Pro models and tools have separate limits; this is not unlimited access to every model.

Total context includes system instructions, tools, memory, internal processing and responses. The space available for your input is smaller and can vary.

Region not specified by source · Tax treatment not established

Official source ↗

Codex · 5-hour window ↗

Codex · Weekly window ↗

OpenAI · · Source coverage updated

ChatGPT Plus

Before

$20 / month

Codex: Web, CLI, IDE, Mobile

  • Exact amount not publishedCodex · 5-hour windowReset rule not established
  • Estimate: 5–45 messagesCodex · Local messages · GPT-6 Astra · 5-hour windowReset rule not established
  • Estimate: 15–160 messagesCodex · Local messages · GPT-6.1 Sol · 5-hour windowReset rule not established
  • Estimate: 35–285 messagesCodex · Local messages · GPT-6.1 Terra · 5-hour windowReset rule not established
  • Estimate: 15–150 messagesCodex · Local messages · GPT-6 Sol · 5-hour windowReset rule not established
  • Estimate: 350–3,000 messagesCodex · Local messages · GPT-6 Luna · 5-hour windowReset rule not established

    Usage depends on the model and task

    API billing is separate from signed-in usage

    Additional usage credits available

    Region not specified by source · Tax treatment not established

    Official source ↗

    Codex · 5-hour window ↗

    Codex · Local messages · GPT-6 Astra · 5-hour window ↗

    Codex · Local messages · GPT-6.1 Sol · 5-hour window ↗

    Codex · Local messages · GPT-6.1 Terra · 5-hour window ↗

    Codex · Local messages · GPT-6 Sol · 5-hour window ↗

    Codex · Local messages · GPT-6 Luna · 5-hour window ↗

    Observed terms

    $20 / month

    Codex: Web, CLI, IDE, Mobile

    • Exact amount not publishedCodex · 5-hour windowReset rule not established
    • Estimate: 5–45 messagesCodex · Local messages · GPT-6 Astra · 5-hour windowReset rule not established
    • Estimate: 15–160 messagesCodex · Local messages · GPT-6.1 Sol · 5-hour windowReset rule not established
    • Estimate: 35–285 messagesCodex · Local messages · GPT-6.1 Terra · 5-hour windowReset rule not established
    • Estimate: 15–150 messagesCodex · Local messages · GPT-6 Sol · 5-hour windowReset rule not established
    • Estimate: 350–3,000 messagesCodex · Local messages · GPT-6 Luna · 5-hour windowReset rule not established

    Usage depends on the model and task

    API billing is separate from signed-in usage

    Additional usage credits available

    Region not specified by source · Tax treatment not established

    Official source ↗

    Codex · 5-hour window ↗

    Codex · Local messages · GPT-6 Astra · 5-hour window ↗

    Codex · Local messages · GPT-6.1 Sol · 5-hour window ↗

    Codex · Local messages · GPT-6.1 Terra · 5-hour window ↗

    Codex · Local messages · GPT-6 Sol · 5-hour window ↗

    Codex · Local messages · GPT-6 Luna · 5-hour window ↗

    ChatGPT Pro · $100.00

    Before

    $100 / month

    Codex: Web, CLI, IDE, Mobile

    • No 5-hour limitCodex · 5-hour window
    • Exact amount not publishedCodex · Weekly windowReset rule not established

      Usage depends on the model and task

      API billing is separate from signed-in usage

      Additional usage credits available

      Region not specified by source · Tax treatment not established

      Official source ↗

      Codex · 5-hour window ↗

      Codex · Weekly window ↗

      Observed terms

      $100 / month

      Codex: Web, CLI, IDE, Mobile

      • No 5-hour limitCodex · 5-hour window
      • Exact amount not publishedCodex · Weekly windowReset rule not established

      Usage depends on the model and task

      API billing is separate from signed-in usage

      Additional usage credits available

      Region not specified by source · Tax treatment not established

      Official source ↗

      Codex · 5-hour window ↗

      Codex · Weekly window ↗

      ChatGPT Pro · $200.00

      Before

      $200 / month

      Codex: Web, CLI, IDE, Mobile

      • No 5-hour limitCodex · 5-hour window
      • Exact amount not publishedCodex · Weekly windowReset rule not established

        Usage depends on the model and task

        API billing is separate from signed-in usage

        Additional usage credits available

        Region not specified by source · Tax treatment not established

        Official source ↗

        Codex · 5-hour window ↗

        Codex · Weekly window ↗

        Observed terms

        $200 / month

        Codex: Web, CLI, IDE, Mobile

        • No 5-hour limitCodex · 5-hour window
        • Exact amount not publishedCodex · Weekly windowReset rule not established

        Usage depends on the model and task

        API billing is separate from signed-in usage

        Additional usage credits available

        Region not specified by source · Tax treatment not established

        Official source ↗

        Codex · 5-hour window ↗

        Codex · Weekly window ↗

        ChatGPT Pro · $500.00

        Before

        $500 / month

        Codex: Web, CLI, IDE, Mobile

        • No 5-hour limitCodex · 5-hour window
        • Exact amount not publishedCodex · Weekly windowReset rule not established

          Usage depends on the model and task

          API billing is separate from signed-in usage

          Additional usage credits available

          Region not specified by source · Tax treatment not established

          Official source ↗

          Codex · 5-hour window ↗

          Codex · Weekly window ↗

          Observed terms

          $500 / month

          Codex: Web, CLI, IDE, Mobile

          • No 5-hour limitCodex · 5-hour window
          • Exact amount not publishedCodex · Weekly windowReset rule not established

          Usage depends on the model and task

          API billing is separate from signed-in usage

          Additional usage credits available

          Region not specified by source · Tax treatment not established

          Official source ↗

          Codex · 5-hour window ↗

          Codex · Weekly window ↗

          OpenAI · · First retained terms

          ChatGPT Plus

          Observed terms

          $20 / month

          Codex: Web, CLI, IDE, Mobile

          • Exact amount not publishedCodex · 5-hour windowReset rule not established
          • Estimate: 5–45 messagesCodex · Local messages · GPT-6 Astra · 5-hour windowReset rule not established
          • Estimate: 15–160 messagesCodex · Local messages · GPT-6.1 Sol · 5-hour windowReset rule not established
          • Estimate: 35–285 messagesCodex · Local messages · GPT-6.1 Terra · 5-hour windowReset rule not established
          • Estimate: 15–150 messagesCodex · Local messages · GPT-6 Sol · 5-hour windowReset rule not established
          • Estimate: 350–3,000 messagesCodex · Local messages · GPT-6 Luna · 5-hour windowReset rule not established

            Usage depends on the model and task

            API billing is separate from signed-in usage

            Additional usage credits available

            Region not specified by source · Tax treatment not established

            Official source ↗

            Codex · 5-hour window ↗

            Codex · Local messages · GPT-6 Astra · 5-hour window ↗

            Codex · Local messages · GPT-6.1 Sol · 5-hour window ↗

            Codex · Local messages · GPT-6.1 Terra · 5-hour window ↗

            Codex · Local messages · GPT-6 Sol · 5-hour window ↗

            Codex · Local messages · GPT-6 Luna · 5-hour window ↗

            ChatGPT Pro · $100.00

            Observed terms

            $100 / month

            Codex: Web, CLI, IDE, Mobile

            • No 5-hour limitCodex · 5-hour window
            • Exact amount not publishedCodex · Weekly windowReset rule not established

              Usage depends on the model and task

              API billing is separate from signed-in usage

              Additional usage credits available

              Region not specified by source · Tax treatment not established

              Official source ↗

              Codex · 5-hour window ↗

              Codex · Weekly window ↗

              ChatGPT Pro · $200.00

              Observed terms

              $200 / month

              Codex: Web, CLI, IDE, Mobile

              • No 5-hour limitCodex · 5-hour window
              • Exact amount not publishedCodex · Weekly windowReset rule not established

                Usage depends on the model and task

                API billing is separate from signed-in usage

                Additional usage credits available

                Region not specified by source · Tax treatment not established

                Official source ↗

                Codex · 5-hour window ↗

                Codex · Weekly window ↗

                ChatGPT Pro · $500.00

                Observed terms

                $500 / month

                Codex: Web, CLI, IDE, Mobile

                • No 5-hour limitCodex · 5-hour window
                • Exact amount not publishedCodex · Weekly windowReset rule not established

                  Usage depends on the model and task

                  API billing is separate from signed-in usage

                  Additional usage credits available

                  Region not specified by source · Tax treatment not established

                  Official source ↗

                  Codex · 5-hour window ↗

                  Codex · Weekly window ↗

                  Sources checked:

                  What Codex does

                  Codex can inspect a repository, edit files and run development tools. The CLI puts that loop in a terminal; the IDE extension puts it beside your editor. This page combines a starting workflow with the dated updates below.

                  Use a first task to establish what the agent can verify in your project. A useful result is a reviewed change with a working check and a clear explanation of anything left unresolved.

                  Subscription or API billing

                  The official pricing page lists Plus at US$20/month and Pro from US$100/month. ChatGPT Work and Codex share usage. Signing in with an API key instead uses API billing; API token prices do not tell you how many tasks a subscription includes. Confirm your account's checkout terms before paying.

                  Where to check limits

                  Check your usage dashboard for current limits and resets; in the CLI, use /status. Available models and tools depend on the plan, surface and workspace controls. For a repeatable way to measure allowance, use the Codex task-budget worksheet.

                  Install Codex CLI and check your sign-in

                  The official installer provides this command for macOS and Linux:

                  curl -fsSL https://chatgpt.com/codex/install.sh | sh

                  On Windows, select the Windows instructions on that same page. Open a terminal in your project folder, then run:

                  codex login
codex login status
codex

                  Browser sign-in uses your ChatGPT account. An API key selects a separate billing route; see authentication. The CLI reference explains the sign-in status command. Check /status inside the session before starting work.

                  A useful first task

                  Use a small practice project with Python 3. Save its starting files in a Git checkpoint so you can inspect the change. Put this intentionally incomplete function in tags.py:

                  def normalize_tags(tags):
    return [tag.lower() for tag in tags]

                  The input is a list of strings. For [' Rust ', 'python', 'RUST', '', ' Python '], the required result is ['rust', 'python']: trim whitespace, lowercase, discard empty tags and remove duplicates while preserving first appearance. The input list must remain unchanged. Copy check_tags.py from the shared exercise into the same folder.

                  First ask Codex to read the two files and explain the failing case. Then submit this task:

                  Fix normalize_tags in tags.py to meet the stated requirements.
Change only tags.py; keep check_tags.py unchanged.
Use only the Python standard library.
Run python3 check_tags.py and report the result and changed files.

                  Use your installed Python 3 command in place of python3 if it has another name. Accept the change after the checker prints 4 cases passed; input unchanged, the diff changes only tags.py, and you understand how the function handles a new input. Record usage before and after, plus review time, in the comparison worksheet.

                  For a model-specific trial, the GPT-6 Astra guide discusses long requests and acceptance checks; the GPT-5.6 Sol guide explains identifiers and a repository comparison. Check which model your own session actually uses.

                  Try the same bounded task in Claude Code or Cursor if you are choosing a workflow. This is a suggested evaluation method, not a measured ranking. The timeline preserves announcements and reports with their original dates.

                  Practical guides

                  Timeline

                  August 2026
                  1. ⚡️ ChatGPT just got a quick launch for Codex RemoteTools & updates
                  2. GPT 5.6 Luna is now a native subagentTools & updates
                  3. ⚡️ Codex is getting 94% fasterTools & updates
                  4. ⚡ Codex for Linux is finally out!Tools & updates
                  5. ⚡️ Codex gets collaborative designTools & updates
                  6. Dear Codex gamblers, I made a tiny unofficial macOS hack that makes Codex show half your remaining percentage.Tools & updates
                  July 2026
                  1. AI RECAP: JULY 23Tools & updates
                  2. ⚡️ RELEASE: CODEX REALTIME VOICETools & updates
                  3. A major Codex update is dropping todayTools & updates
                  4. GPT-5.6 Sol brought RollerCoaster Tycoon 2 to the iPadTools & updates
                  5. CODEX NEWSTools & updates
                  6. The Codex team is well aware of the bugs in the new app and is already working on fixes.Tools & updates
                  7. Codex is now ChatGPT Codex.Tools & updates