OpenAI is battling a partial outage affecting ChatGPT, Sora, and its API since late Monday night.
The issue kicked off overnight and is still causing trouble Tuesday morning. At 5:30 am PT, OpenAI pinpointed the root cause and started fixing it. Full service won’t return for a few more hours — meaning West Coast users face downtime this morning.
OpenAI confirmed the outage on Twitter: 
We are observing elevated error rates and latency across ChatGPT and the API.
Our engineers have identified the root cause and are working as fast as possible to fix the issue.
For updates see our status page: https://status.openai.com/incidents/01JXCAW3K3JAE0EP56AEZ7CBG3
Users report “Too many concurrent requests” errors when trying to access GPT-4o on ChatGPT. This partial outage is unusually long compared to typical short-lived ChatGPT disruptions.
The outage arrives amid big moves from OpenAI. On Monday, Apple’s WWDC announced deeper integrations with OpenAI models. The same day, OpenAI confirmed reaching $10 billion in annualized recurring revenue. Early Tuesday, CEO Sam Altman dropped an 80% price cut for developers using its o3 API models.
Scaling AI for hundreds of millions of users remains a challenge. Altman has said the company’s “GPUs are melting” under demand, showing OpenAI’s resources are stretched thin. The outage shows demand is still outpacing supply.
