How to try GPT-5.5 now: ChatGPT, Codex and API availability
The fastest official routes to try GPT 5.5 are ChatGPT and Codex. OpenAI says API availability is still “coming soon.” [1][20] GPT 5.5 is rolling out to Plus, Pro, Business and Enterprise users, while GPT 5.5 Pro is rolling out to Pro, Business and Enterprise users.
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Whether you can try GPT-5.5 right now depends on where you want to use it. For most people, the first place to check is the model selector in ChatGPT. For coding and agent-style development work, check the model picker in Codex. If you are trying to call it from the OpenAI API, the official answer is different: OpenAI’s API documentation says GPT-5.5 is currently available in ChatGPT and Codex, with API availability “coming soon.”
Quick availability guide
What you want to do
Where to check
Official status
Use GPT-5.5 in ChatGPT
ChatGPT model selector
GPT-5.5 is rolling out to Plus, Pro, Business and Enterprise users. It may not appear immediately for every eligible user.
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What is the short answer to "How to try GPT-5.5 now: ChatGPT, Codex and API availability"?
The fastest official routes to try GPT 5.5 are ChatGPT and Codex. OpenAI says API availability is still “coming soon.” [1][20]
What are the key points to validate first?
The fastest official routes to try GPT 5.5 are ChatGPT and Codex. OpenAI says API availability is still “coming soon.” [1][20] GPT 5.5 is rolling out to Plus, Pro, Business and Enterprise users, while GPT 5.5 Pro is rolling out to Pro, Business and Enterprise users.
What should I do next in practice?
For coding work, check Codex: OpenAI’s Codex changelog says GPT 5.5 is recommended for many Codex tasks when it appears in the model picker.
GPT-5.5 Pro is rolling out to Pro, Business and Enterprise users. OpenAI’s pricing page does not list Plus as eligible for GPT-5.5 Pro.
Use GPT-5.5 in Codex
Codex model picker
GPT-5.5 is available in Codex and is recommended for many Codex tasks when it appears in the picker.
Use GPT-5.5 through the API
OpenAI API model list
OpenAI’s API docs list GPT-5.5 as available in ChatGPT and Codex, with API availability coming soon.
How to check for GPT-5.5 in ChatGPT
If you want to use GPT-5.5 in ChatGPT, sign in with an eligible account and open the model selector at the top of a new or existing chat. OpenAI’s Help Center says GPT-5.5 is rolling out to Plus, Pro, Business and Enterprise users in ChatGPT and Codex.
Log in to ChatGPT.
Open a new chat, or use the model selector at the top of the chat window.
Look for GPT-5.5 in the model list.
If you use a Pro, Business or Enterprise account, also check whether GPT-5.5 Pro appears.
If GPT-5.5 does not show up, that does not necessarily mean something is wrong with your account or settings. OpenAI says the rollout to ChatGPT users is gradual and may not be immediately available.
Don’t look for GPT-5.5 Pro on Plus
GPT-5.5 and GPT-5.5 Pro are not the same availability tier. OpenAI says GPT-5.5 Pro is rolling out to Pro, Business and Enterprise users in ChatGPT.
OpenAI’s pricing page also lists GPT-5.5 Pro as unavailable for Free, Go and Plus plans, available for Pro, and flexible for Business and Enterprise. So if you have ChatGPT Plus, the model to look for first is GPT-5.5, not GPT-5.5 Pro.
How to try GPT-5.5 in Codex
For coding, refactoring, debugging and related development work, Codex may be the more relevant place to check. OpenAI’s Codex changelog says GPT-5.5 is available in Codex as a frontier model for complex coding, computer use, knowledge work and research workflows.
To try it, open Codex and check the model picker. The Codex changelog says GPT-5.5 is the recommended choice for most Codex tasks when it appears, especially for implementation, refactoring, debugging, testing, validation and knowledge-work areas.
Can you use GPT-5.5 in the API right now?
Not yet, according to the official API documentation. OpenAI’s API docs say GPT-5.5 is currently available in ChatGPT and Codex, with API availability coming soon.
OpenAI’s Help Center also says GPT-5.5 and GPT-5.5 Pro are not launching to the API on the same day as the ChatGPT and Codex rollout, because API deployments require different safeguards.
OpenAI’s GPT-5.5 announcement says gpt-5.5 will soon be available in the Responses API and Chat Completions API at $5 per 1 million input tokens and $30 per 1 million output tokens, with a 1 million-token context window. It also says gpt-5.5-pro will come to the API at $30 per 1 million input tokens and $180 per 1 million output tokens.
Practically speaking, don’t build production code around a gpt-5.5 API model name until it appears in the official OpenAI API model list. If you need to start API work now and are unsure which model to choose, OpenAI’s API documentation recommends starting with gpt-5.4 for complex reasoning and coding.
If GPT-5.5 is not showing up, check these points
Confirm your plan: GPT-5.5 is rolling out to Plus, Pro, Business and Enterprise users.
Make sure you are not looking for the Pro variant by mistake: GPT-5.5 Pro is for Pro, Business and Enterprise users, not Plus.
Allow for rollout timing: OpenAI says the ChatGPT rollout is gradual and may not be immediately available.
Do not expect API access yet: OpenAI’s API docs still mark GPT-5.5 API availability as coming soon.
Check Codex separately: In Codex, GPT-5.5 is recommended for many tasks when it appears in the model picker.
The shortest path by use case
If you just want to try GPT-5.5 in ChatGPT, sign in with a Plus, Pro, Business or Enterprise account and check the model selector.
If you want GPT-5.5 Pro, check from a Pro, Business or Enterprise account; Plus is not listed as eligible for GPT-5.5 Pro.
If your goal is coding, refactoring, debugging, testing or validation, check the Codex model picker. OpenAI says GPT-5.5 is recommended for many Codex tasks when available there.
If your goal is API integration, the answer is to wait for the official API rollout. Until GPT-5.5 appears in the OpenAI API model list, ChatGPT or Codex are the practical ways to try it.
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