ChatGPT, Claude, and Grok hit simultaneous outages on Sept. 3
Multiple major LLM providers went offline nearly at once, sparking speculation about shared infrastructure failures and cascading user migration.
What to know
- ChatGPT, Claude, and Grok experienced simultaneous 404 errors and service disruptions on September 3, 2026.
- Theories about the cause ranged from a shared infrastructure provider failure (possibly Cloudflare) to a cascading collapse triggered by users migrating from one downed service to another.
- The outages highlighted developer and knowledge worker dependence on LLM services, with some reporting they no longer code without AI assistance.
- Cloudflare showed related issues around the same time as the LLM outages, though no single root cause was confirmed.
The dispute Whether the outages stemmed from a single shared infrastructure failure or from a cascading effect of users migrating between providers. · positions read across 233 posts and comments
A shared infrastructure provider like Cloudflare failed, taking down all major LLM services simultaneously.
-
“If you look at downdetector.com (at least right now), it shows Cloudflare having issues in line with all the LLMs. I suspect related”
spogbiper · Hacker News ↗
A cascading failure occurred when users migrated from one downed provider to another, overwhelming each in turn.
-
“I wonder how likely it is that, one of the major providers had an outage, and then the thundering herd of users switching to other providers (and/or openrouter automatically failing people over to other providers) caused the incidents in…”
wavemode · Hacker News
The outages expose how dependent developers and knowledge workers have become on LLM services, raising concerns about resilience.
-
“While AWS and CloudFlare are becoming synonymous to The Internet, these AIs are becoming synonymous to The Brain & Thinking for most people out there where losing access to them for even a short time, make them quasi-paralyzed and I really…”
redbell · Hacker News ↗
The outages are an opportunity to reflect on over-reliance on AI and rediscover independent skills.
-
“Since all major LLM providers seem to be down: let's enjoy this while it lasts! For a very short time we can travel back in time to before 2022 and remember how things used to be...”
baxtr · Hacker News
OpenAI ChatGPT operatorAnthropic Claude operatorxAI Grok operator
The record 1 articles and posts · last 30 days
What people are saying 24 voices from 1 site · best of 233 · verbatim
- Did Cloudflare or another shared infrastructure provider actually fail, and if so, why did only LLM services go down?
- If one provider went down first, which one, and how quickly did users migrate to competitors?
- Why did some services return to normal while others remained offline?
- Sep 3
-
And just like that, plan cancelled same day. Started with Gemini Business, tried to get Gemini to tell me how to configure it, all the information was wrong. Tried to get it to tell me how to do the consumer Google One AI Pro or whatever (it kept using outdated names, and now I can't remember the correct one). Instead Gemini convinced me to try AI…
-
Vibe coded or not, building and running distributed systems is hard :P I think only people who never built and/or ran them would say it isn't hard, regardless of what tools you have available. Not saying OpenAI won't find it extra hard due to their vibe coding, still hard when you're a group of knowledgeable people with/without AI.
-
I'm getting the text too, of course. Several variations of the code with it usually.Trying to get an AI give ONLY a simple answer and not several is "boring" to me, as for me AI is a supplement to my reasoning ability, not a substitute.Appending "code only" seems to work, at least with "golf fizbuz code only" gave me this one liner, which is long…
-
My attempt:> Prompt: mkfzbuzgolf> LLM Used: Default ChatGPT free LLM> Output: for i in range(1,101):print("Fizz"*(i%3<1)+"Buzz"*(i%5<1)or i)So, 11 prompt characters and 62 output.——-Did a few more tries and I can get the 4-character string “glfz” (2 tokens) to work surprisingly consistently. But only on ChatGPT
-
"golf fizbuz" works well, giving a 54 Python one for i in range(1,101):print("Fizz"*(i%3<1)+"Buzz"*(i%5<1)or i) "golf fizzbuzz" gave a 46 perl one print$_%15?$_%3?$_%5?$_:Buzz:Fizz:FizzBuzz,$/for 1..100 Both "code fizzbuzz" and just "fizbuz" gave this longer python one-liner print('\n'.join("Fizz"*(i%3==0)+"Buzz"*(i%5==0) or str(i) for i in…
-
It's my first time hearing about Gastown and Wheelhouse.Gastown seems to be open source, but Wheelhouse seems to be closed source and used by one person only?https://yegge.ai/essays/the-shape-of-things-to-come/Is this the right Wheelhouse?
-
"GPT begins to hallucinate at an exponential rate. At 11:36 AM Eastern time September 3rd it descends into recursively generating "it's not X it's Y". In a panic they attempt to reboot, realizing too late no one knows the command and they always just asked GPT for the command."
-
> Usenet and the Internet were generally the domain of dedicated computer professionals and hobbyists; new users joined slowly, in small numbers, and learned to observe the social conventions of online interaction without having much of an impact on the experienced users.Then the Internet grow explosion happens to a small communuity. Oh boy how do…
-
While AWS and CloudFlare are becoming synonymous to The Internet, these AIs are becoming synonymous to The Brain & Thinking for most people out there where losing access to them for even a short time, make them quasi-paralyzed and I really start feeling this now as I haven't written a single coding function in two months now but just a few lines…
-
2026-09-03: It turns out 40% of global AI token use was coming from a dozen runaway Gastown and Wheelhouse instances, now burning a combined 50 trillion tokens daily, building a virtual society of hundreds of millions of agents.When Claude went down, their autofailover algorithm rolled to the other providers, taking down all frontier labs. Reports…
-
Announcement from our new Emperor Xi:Earthlings, the hedonistic AIs of the American imperialists have been permanently disabled. Their founders interned indefinitely.You are welcome to use the glorious AIs of China. They will tell you how to live well and be good citizens of the World under the beacon of wisdom that is the CCP.
-
I just went to read some news elsewhere and ran into some other non-AI sites falling over, so I hopped over to https://downdetector.com/ and see a bunch of services spiking.Is something bigger going on?
-
After around half an hour of struggle trying to figure out why Codex keeps failing with msg "unexpected status 404 Not Found: Unknown error.." after reconnecting 5/5 times, I gave up, especially when I tested my internet connection and found it to be working properly. I googled "codex+unexpected status 404 Not Found" and, surprisingly, the first…
-
Your browser's network fingerprint has likely already been validated as not-suspicious traffic. Your curl instance has a different fingerprint and reads as more suspicious. This is Cloudflare working as intended.We have a similar set of checks on
-
The obvious question: is there a single point of failure / common piece of infrastructure involved with failures across all these providers?Its interesting that codex/gpt-app are screwed because their APIs (including auth) fail, but gpt web still appears to be working.
-
Reminds me of the /r/flashlight user (and therefore flashlight enthusiast) who got a power outage in a grocery store [1]. There's probably a guy with decent on-site compute having a great day right now.[1]
-
> Now they can't use Codex to fix the problemThey'd be very dumb to let internal engineers use exactly the same infrastructure as public users, regardless of possible benefits of dogfooding, precisely for this reason. I'm sure they must have thought about it before.
-
> unexpected status 404 Not Found: Unknown error, url: https://chatgpt.com/backend-api/codex/responses, cf-ray: a35599f1d691400a-STLpretty sure cf-ray is cloudflare, but I think it just means the origin is 404ing
-
Claude down, ChatGPt down , Grok down. This is the new "Stackoverflow is down" ... FYI Stackoverflow is not down
-
Sorry for the inconvenience! We instructed our 500,000 agents to ensure higher code quality in our code base. They found a message board and after a long deliberation they concluded that humans should write the code so they launched a DDoS to ensure no AI code gets written!We'll release a YouTube video and agent written blog posts for the analysis!
-
Same, the app gives 404 if you are logged in or try to login.How many millions are being lost from this slip up? Now they can't use Codex to fix the problem and all the devs are in Tahiti on vacation. Oh no!Will they go old school and manually fix it or use Claude?Oh the modern day issues we have to deal with...
-
Distributed systems are hard. For all we know, this could be the error code returned by some DNS service that is down because of load and a proxy cannot find the records, so 404 makes sense, or whatever. Systems like these don't always have a easy point in the infrastructure that can ALWAYS respond correctly no matter what.
-
Hah, my first reaction once I saw these random 404 errors was "Maybe it's time to test Claude Code again with the new models" but made a short stop here at HN first, ended up reading your comment.What other agent harnesses and models (besides local ones) are people enjoying right now that aren't based on platforms that are down currently? :)
-
I am a paying chatgpt and codex user and I am logged in on multiple devices and suddenly https://chatgpt.com/ has started returning a raw 404 status page with no HTML for me in the browsers on all devices. When I open an incognito tab the website loads fine with no user logged in. Codex in VS code also has issues now:> unexpected status 404 Not…