⚠️ Pricing change: ChatGPT and Codex keep running. Only the GPT-5.5 model retires from ChatGPT, ChatGPT Work and Codex on all plans on 2026-10-14. For Codex with ChatGPT sign-in, OpenAI names GPT-6.1 Sol as the replacement on Plus, Pro, Business, Enterprise and Edu plans (its page named GPT-6 Sol when we read it on 2026-10-06) and GPT-6 Luna on Free and Go plans. The OpenAI API is not affected. Source ↗ (effective 2026-10-14)View in changelog →
The day we last read the vendor's page, and the day we last confirmed the terms we publish.
Free Tier Details
Coding agent by OpenAI. Available with a ChatGPT subscription, including the $0 Free plan, and separately with an API key billed on token use; both routes are current. OpenAI's Codex pricing page lists Free ($0/month, "Explore Codex capabilities on quick coding tasks") and Go ($8/month, "Use Codex for lightweight coding tasks"), both with GPT-6 Luna at Standard speed in the desktop app, subject to rollout. Plus ($20/month) adds Codex on the web, in the CLI, in the IDE extension and on iOS, cloud code review and Slack integrations, and GPT-6.1 Sol and GPT-6 Luna. Pro plans are Pro 100 ($100/month), Pro 200 ($200/month), and Pro 500 ($500/month). Ultrafast mode is only on Pro 500. Pro plans have no five-hour limit. On 2026-10-29 OpenAI canceled the Pro 200 allowance reduction it had announced on September 29, 2026. Every Pro 200 subscription, new or existing, now has the same Work and Codex allowance at $200 a month. Pro 100 and Pro 500 now include twice their previous Work and Codex allowance. Plus usage is unchanged. ChatGPT Business has two seat types, both carrying Codex: Standard at $20/user/mo billed annually ($25 monthly) and Premium at $100/user/mo billed annually ($125 monthly), where Premium buys 5x more usage than Standard and removes the five-hour usage limit. The Codex pricing page we cite lists only the Standard seat — the Premium seat is published on OpenAI's business pricing page. Codex-only pay-as-you-go seats closed to new Business workspaces on 2026-06-24; existing seats continue. With an API key, Codex runs in the CLI, SDK or IDE extension at API prices, without the cloud features.
We read that on 2026-11-09 from https://developers.openai.com/codex/pricing/, and our check recorded: the page names OpenAI Codex as "codex" and states "$0" and "$8" and "$20" and "$100".
From developers.openai.com/codex/pricing, read 2026-11-09:
Free Explore Codex capabilities on quick coding tasks. $0 /month Get Free GPT-6 Luna at Standard speed in the desktop app, subject to rollout
Since 2026-10-28, ChatGPT Pro and Business subscriptions include monthly OpenAI API credits. These credits do not pay for Codex used with an API key. They do not raise ChatGPT or signed-in Codex usage limits. (From developers.openai.com/api/docs/guides/chatgpt-api-credits, read 2026-10-29.)
On Free, Plus, and Pro, OpenAI may use your content to train its models. This includes Codex tasks. By default, OpenAI does not use inputs or outputs from ChatGPT Business, ChatGPT Enterprise, ChatGPT Edu, or the API to improve its models. (From help.openai.com/en/articles/5722486-how-your-data-is-used-to-improve-model-performance, read 2026-10-30.)
To opt out, turn off Improve the model for everyone under Settings > Data controls in ChatGPT, or select Do not train on my content in the Privacy Portal. Either option applies to ChatGPT and Codex. Codex has a separate Include environments setting for training on full environments, which those settings do not change. (From help.openai.com/en/articles/5722486-how-your-data-is-used-to-improve-model-performance, read 2026-10-30.)
OpenAI's Terms of Use for its services for individuals state you retain ownership rights in Input and own the Output. You may not use Output to develop models that compete with OpenAI. No restriction on commercial use is listed. (From openai.com/policies/terms-of-use, read 2026-10-30.)
When You'll Outgrow OpenAI Codex's Free Tier
When your usage exceeds the free tier limits, you'll need to upgrade.
ChatGPT and Codex keep running. Only the GPT-5.5 model retires from ChatGPT, ChatGPT Work and Codex on all plans on 2026-10-14. For Codex with ChatGPT sign-in, OpenAI names GPT-6.1 Sol as the replacement on Plus, Pro, Business, Enterprise and Edu plans (its page named GPT-6 Sol when we read it on 2026-10-06) and GPT-6 Luna on Free and Go plans. The OpenAI API is not affected. Source ↗
Before: GPT-5.5 available in ChatGPT, ChatGPT Work and Codex
After: "On October 14, 2026, GPT-5.5 will retire from ChatGPT, ChatGPT Work, and Codex on all plans, including consumer, Business, Enterprise, and Edu plans. This retirement does not apply to the OpenAI API." (learn.chatgpt.com/docs/models, read 2026-10-06) "For Codex with ChatGPT sign-in, choose an available replacement: On Plus, Pro, Business, Enterprise, and Edu plans, choose GPT-6.1 Sol (gpt-6.1-sol) when available. On Free and Go plans, choose GPT-6 Luna (gpt-6-luna) in the desktop app when available." (learn.chatgpt.com/docs/models, read 2026-10-21)
Data correction - OpenAI's post of 2026-04-02 added Codex-only pay-as-you-go seats beside ChatGPT subscriptions and lowered ChatGPT Business's annual seat price. We had recorded it on 2026-04-03 as a switch from subscriptions to pay-as-you-go. Source ↗
Before: Recorded as pricing_restructured, dated 2026-04-03
After: new_tier, dated 2026-04-02 from OpenAI's post
ChatGPT Business and Codex keep running. From 2026-06-24, new self-serve ChatGPT Business workspaces cannot add Codex-only seats, which OpenAI now calls a legacy seat type. A workspace that added one before that date can keep adding them, and Standard and Premium ChatGPT seats include Codex. Source ↗
Before: ChatGPT Business and Enterprise workspaces could add Codex-only seats with no fixed seat fee, billed on token consumption (OpenAI, 2026-04-02)
After: "Starting June 24, 2026, new self-serve ChatGPT Business workspaces cannot add Codex seats, which are a legacy seat type. A Business workspace that added a legacy Codex seat before June 24, 2026, can continue to manage and add that legacy seat type. Standard and Premium ChatGPT seats both already include access to Codex." (help.openai.com/en/articles/8542115, read 2026-10-21)
OpenAI added Codex-only seats for ChatGPT Business and Enterprise workspaces, with no fixed seat fee, no rate limits and usage billed on token consumption, and cut ChatGPT Business's annual price from $25 to $20 per seat. Standard Business seats, which include Codex with usage limits, continued. Source ↗
Before: ChatGPT Business at $25 per seat billed annually; Codex available through ChatGPT seats with usage limits
After: "teams on ChatGPT Business and Enterprise can add Codex-only seats to their workspaces with pay-as-you-go pricing, giving full access to Codex without a fixed seat fee"; "we're lowering the annual price of ChatGPT Business from $25 to $20 per seat"
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Yes, OpenAI Codex offers a free tier: Free. Coding agent by OpenAI. Available with a ChatGPT subscription, including the $0 Free plan, and separately with an API key billed on token use; both routes are current. OpenAI's Codex pricing page list...
What is OpenAI Codex's free tier?
OpenAI Codex's free tier is called "Free". Coding agent by OpenAI. Available with a ChatGPT subscription, including the $0 Free plan, and separately with an API key billed on token use; both routes are current. OpenAI's Codex pricing page lists Free ($0/month, "Explore Codex capabilities on quick coding tasks") and Go ($8/month, "Use Codex for lightweight coding tasks"), both with GPT-6 Luna at Standard speed in the desktop app, subject to rollout. Plus ($20/month) adds Codex on the web, in the CLI, in the IDE extension and on iOS, cloud code review and Slack integrations, and GPT-6.1 Sol and GPT-6 Luna. Pro plans are Pro 100 ($100/month), Pro 200 ($200/month), and Pro 500 ($500/month). Ultrafast mode is only on Pro 500. Pro plans have no five-hour limit. On 2026-10-29 OpenAI canceled the Pro 200 allowance reduction it had announced on September 29, 2026. Every Pro 200 subscription, new or existing, now has the same Work and Codex allowance at $200 a month. Pro 100 and Pro 500 now include twice their previous Work and Codex allowance. Plus usage is unchanged. ChatGPT Business has two seat types, both carrying Codex: Standard at $20/user/mo billed annually ($25 monthly) and Premium at $100/user/mo billed annually ($125 monthly), where Premium buys 5x more usage than Standard and removes the five-hour usage limit. The Codex pricing page we cite lists only the Standard seat — the Premium seat is published on OpenAI's business pricing page. Codex-only pay-as-you-go seats closed to new Business workspaces on 2026-06-24; existing seats continue. With an API key, Codex runs in the CLI, SDK or IDE extension at API prices, without the cloud features. Since 2026-10-28, ChatGPT Pro and Business subscriptions include monthly OpenAI API credits. These credits do not pay for Codex used with an API key. They do not raise ChatGPT or signed-in Codex usage limits. (From https://developers.openai.com/api/docs/guides/chatgpt-api-credits, read 2026-10-29.) On Free, Plus, and Pro, OpenAI may use your content to train its models. This includes Codex tasks. By default, OpenAI does not use inputs or outputs from ChatGPT Business, ChatGPT Enterprise, ChatGPT Edu, or the API to improve its models. (From https://help.openai.com/en/articles/5722486-how-your-data-is-used-to-improve-model-performance, read 2026-10-30.) To opt out, turn off Improve the model for everyone under Settings > Data controls in ChatGPT, or select Do not train on my content in the Privacy Portal. Either option applies to ChatGPT and Codex. Codex has a separate Include environments setting for training on full environments, which those settings do not change. (From https://help.openai.com/en/articles/5722486-how-your-data-is-used-to-improve-model-performance, read 2026-10-30.) OpenAI's Terms of Use for its services for individuals state you retain ownership rights in Input and own the Output. You may not use Output to develop models that compete with OpenAI. No restriction on commercial use is listed. (From https://openai.com/policies/terms-of-use/, read 2026-10-30.)
Is OpenAI Codex's free tier reliable?
OpenAI Codex's free tier is considered stable. None of the 3 recorded changes narrowed the terms. See the pricing history below.
Is OpenAI Codex's free tier good for production?
OpenAI Codex's free tier can be suitable for small production workloads and side projects. We rate it stable and it offers Coding agent by OpenAI…, so it's a reasonable starting point. None of the 3 recorded changes narrowed the terms. Monitor your usage against the limits and have an upgrade plan ready.
What changed in OpenAI Codex's pricing?
OpenAI Codex has had 3 recorded pricing changes. Most recently: ChatGPT and Codex keep running. Only the GPT-5.5 model retires from ChatGPT, ChatGPT Work and Codex on all plans on 2026-10-14. For Codex with ChatGPT sign-in, OpenAI names GPT-6.1 Sol as the replacement on Plus, Pro, Business, Enterprise and Edu plans (its page named GPT-6 Sol when we read it on 2026-10-06) and GPT-6 Luna on Free and Go plans. The OpenAI API is not affected. Source: https://learn.chatgpt.com/docs/models (2026-10-14).
When will I outgrow OpenAI Codex's free tier?
When your usage exceeds the free tier limits, you'll need to upgrade. When you outgrow the free tier, evaluate paid plans against alternatives — sometimes a competitor's free tier covers what you need.
What category is OpenAI Codex in?
OpenAI Codex is categorized under AI Coding on AgentDeals.