What changed
ChatGPT and the OpenAI API have always been billed as two separate products. You paid a subscription to chat, and you paid per token to build. The October 28 change connects the two wallets for Pro individuals and Business workspaces.
The headline figure, $500 a month, is the ceiling, and it is reached two different ways. An individual reaches it only on the $500 Pro tier, where the credit equals the subscription price exactly: pay $500, receive $500 of API balance. A Business workspace reaches it by pooling seats, at $20 for each paid Standard seat and $100 for each paid Premium seat. There is no version of this where a $20 subscription quietly becomes $500 of API spend. Plus, Go, Free and Enterprise are not eligible for this particular credit benefit. Subscribers on those plans can still use the API under its separate billing arrangements; they simply do not receive these bundled credits.
Claiming is a one-time link between a subscription and a single API organization. Choose carefully: the documentation says changing the receiving organization afterwards means contacting support.
The cap does the arithmetic
The per-seat amounts sound generous until the pool fills. A workspace made up entirely of paid Standard seats reaches the $500 cap at 25 seats; one made up entirely of paid Premium seats reaches it at five. Mixed workspaces reach the cap when their pooled credits total $500. Once the cap is reached, additional seats add no monthly credit.
Run the same arithmetic at a larger size. A workspace with 100 Standard seats still receives $500 a month, which works out at $5 of API credit per seat. The benefit is worth most, per person, to the smallest teams and to individual Pro subscribers. The shape favours small teams and individual Pro subscribers over large workspaces.
Two further conditions shrink the headline. The first grant is prorated to whatever is left of the current billing cycle, so claiming mid-month yields a part-month balance on a part-month clock. And nothing rolls over. Credit unused when the cycle ends is gone, which turns the benefit into a monthly deadline as much as a monthly allowance.
What the credit will not pay for
The exclusion list is short and specific. Codex usage through an API key is not supported by the benefit. The credits do not increase ChatGPT usage limits, and they do not increase the limits of Codex used while signed in. They pay for API Platform usage billed to the linked organization: the Responses API, the Agents API including OpenAI-hosted sandbox charges, the Decisions API, GPT-Live and the Realtime API for voice, the Images API, and built-in tools such as web search, file search and Code Interpreter, storage included.
The distinction is between API Platform usage and consumption of OpenAI's coding tool through an API key. The documented benefit covers the former and excludes the latter. That structure makes the offer most useful to subscribers building applications or agents on the API, rather than to those seeking more Codex usage. OpenAI has not published figures showing how subscribers are using the benefit or why it chose these boundaries.
There is also no promise about duration. The documentation says credits arrive at renewal "while these benefits are available and your subscription is eligible", and OpenAI has published no count of eligible subscribers, no cost figure for the programme and no usage data. Treat the October 28, 2026 announcement as the terms currently published, not as a guarantee that the benefit will remain available indefinitely. OpenAI has published no uptake, programme-cost or duration figures.
Anthropic wrote this playbook three weeks earlier
None of this is unique to OpenAI. On October 7, 2026, alongside its cheapest model, Claude Haiku 5.5, Anthropic introduced a monthly API credit for Claude Max and Team subscribers. Its documentation, read alongside OpenAI's for this article, lists $100 a month for Max 5x and $200 for Max 20x. On Team, the figures are identical to OpenAI's Business amounts: $20 per Standard seat, $100 per Premium seat, pooled and capped at $500.
The rules rhyme as well. A seven-day wait before claiming. No rollover. No payment method required on the developer platform. The coding tool held out: Claude Code at Anthropic, Codex through an API key at OpenAI. Usage limits in the chat product unchanged at both companies.
Three differences remain. OpenAI's top individual tier receives $500, against $200 for Anthropic's most expensive Max plan. OpenAI pays an annual Business workspace its whole year's credit at once, up to $6,000, expiring at the end of the annual cycle, while Anthropic pays annual-plan credits monthly. And a Business seat added mid-cycle can bring extra prorated credit at OpenAI, where Anthropic counts a new Team seat from the next billing month.
For a subscriber deciding between the two ecosystems, those differences are smaller than the shared structure. Both companies now offer eligible chat subscribers a time-limited budget for their developer platforms, with credits that expire rather than roll over. The shared structure is clear; whether it changes subscriber behavior remains unmeasured. The competition has moved from the subscription price to what the subscription quietly includes.
How to claim it, and the one decision to get right
If you hold an eligible plan, the claim path is short. Pro subscribers open ChatGPT, go to Settings, then Billing, and start the API credits claim. Business owners use the workspace billing settings or the Admin Console. You will pick the API organization that receives the credits, and the documentation is plain that it must be one you own, under the same email address as the subscription.
Get that choice right before you confirm. The organization you link is the only one the credits can pay for, every project key in it draws on the same balance, and moving the benefit to a different organization later runs through OpenAI support. If your API work lives in more than one organization, link the one where the spend actually happens, then check the balance in the API Platform billing settings and plan the work inside the cycle. A credit that expires unused is worth exactly what an unclaimed one is.
Sources
- [1] OpenAI, "API credits for ChatGPT subscribers", developer documentation (read October 29, 2026)Read source
- [2] OpenAI Developers (@OpenAIDevs) announcement, relayed in the OpenAI Developer Community, "Claim up to 500$ in API credits using your ChatGPT Pro or Business subscription" (October 28, 2026)Read source
- [3] Anthropic, "API credits for Max and Team plans", Claude Platform Docs (read October 29, 2026)Read source
- [4] Anthropic, "Introducing Claude Haiku 5.5" launch post (October 7, 2026), announcing the monthly API credit for Max and Team subscribersRead source
- [5] MACCUS, "OpenAI now gives ChatGPT Pro and Business subscribers up to $500 a month in API credits" (October 29, 2026), a side-by-side reading of both companies' documentation, used only to cross-check the Anthropic launch dateRead source