As of Monday, June 12 2023, new 2FA/MFA enrollments are temporarily paused.
If you've already enrolled in 2FA/MFA and are able to login you can continue to use it or disable it if preferable.
If you are having trouble logging in and own an iOS device, first check Settings > Passwords > OpenAI on your device and look for a verification code. If found, enter that on the "Verify your identity" screen during login.
Does OpenAI offer 2FA?
Yes, OpenAI offers 2FA. One can enable 2FA through ChatGPT, however, once enabled, it applies to signing in to any OpenAI products i.e. the API, the Playground (platform.openai.com), DALL-E2 (labs.openai.com).
How to enable 2FA?
Yes and you can enable / disable it in chat.openai.com you will click Settings:
In the Settings modal click Data Controls then click Enable on Enable two-factor authentication: