Given the amount of usage I'm now getting from Opus 5.5, I'm surprised it took this long since release for their first outage. In my experience, it's about 10x the usage of Fable 5.1 with similar, perhaps greater levels of intelligence.
"Update
We are investigating reports of degraded performance ... We will provide an update as soon as possible.
Posted 1 minute ago. Sep 29, 2026 - 14:30 UTC
Update
We are investigating elevated error rates ... We will provide an update as soon as possible.
Posted 2 minutes ago. Sep 29, 2026 - 14:28 UTC
Investigating
We are investigating elevated error rates affecting Claude.ai ... We will provide an update as soon as possible."
just a hunch, but i think they might just provide an update as soon as possible.
Maybe an increase in sign ups due to people learning of their existence from the IPO? It's the authentication that seems to be failing, not the actual inference.
Elevated errors on claude.ai, Claude Code, Claude Cowork and the Claude API
Subscribe
Update - We are investigating reports of degraded performance affecting claude.ai, platform.claude.com, the Claude API, Claude Code, and Claude Cowork. We will provide an update as soon as possible.
Sep 29, 2026 - 14:30 UTC
Update - We are investigating elevated error rates affecting Claude.ai (including the desktop and mobile apps), Claude Code and Claude Cowork. Some requests to the Claude API are also returning errors. We will provide an update as soon as possible.
Sep 29, 2026 - 14:28 UTC
Investigating - We are investigating elevated error rates affecting Claude.ai (including the desktop and mobile apps), Claude Code and Claude Cowork. Users may see failed requests, errors loading or sending conversations, or be asked to sign in again; retrying may succeed. We will provide an update as soon as possible.
Sep 29, 2026 - 14:21 UTC
You can get away with a lack of rigor in software engineering (from both humans and AI agaents) because it's often cheap to try it and see. Once you get to operating the platform, it changes, and operational decisions need to be made carefully and code needs to be deployed carefully.
Anthropic yesterday: We have perfect AI agents to do everything now, value us at $100 Trillion
Anthropic today: We don't really have AI agents, they are glorified versions of automation scripts and one has broken today. But tomorrow we will have perfect AI agents, so still value us at $100 Trillion.
I've seen many people with 500s for over an hour, meanwhile the status page was green with no issues whatsoever.
Have they tried using a fraction of their immense budget to run E2E tests?
At this point downdetector is more reliable than any of these "status" pages. And it does show reports starting 9:30ish AM EST.
I've been getting 503s from the API. When I first checked everything was green, then it said "Claude.ai (including the desktop and mobile apps), Claude Code and Claude Cowork" and I see now they've included the API in the failure as well
Yesterday got email from Claude that they are offering 50% off for one month if I renew my subscription. I bought it today and now this. I wonder if they sent that email to too many people.
Imagine having a bunch of Claude agents doing time sensitive work and this happens and now a single human needs to pick up several 8k PRs authored by bots that can't talk to you now. Not sure how effective it would be to switch models using OpenRouter and the like given that, as the Earendil guys said, there is a lot of session detail that the provider doesn't share. The uptime is really going to cap their market penetration imo.
Neither electricity, nor the Internet is provided by one or two organizations globally, both with a blast radius that quite often takes out all of their services.
Not sure how long the latter will remain true – centralization is well underway there; try not to think of Cloudflare too much...
When I worked at one of the early paging and cellular companies, every company had phones and pagers on at least one or two competitors for the oncall folks - you can't get a call to fix your cellular network when you are down.
Likewise while at Google, they didn't let us put Google Voice numbers down as our oncall phone number. Some folks even had multiple phones on different networks as backups.
I'm sure they have either other SOTA models or open source models around to help if things to completely pear shaped.
Never thought of it, but knowing that they encrypt reasoning is it possible that they share the decryption keys with other cloud providers like GCP Vertex / AWS Bedrock?
Berget's "Cached input tokens are billed at the same rate as regular input tokens" pricing model is kind of painful for lots of coding use-cases, especially when competitors are offering significant discounts for cached input tokens.
Project completely disappeared. Conveniently for Anthropic, the bug report also went down, so they weren't spammed by my stale complaints after the project magically resurfaced.
I'm not sure this is even conceivable, but... Imagine the bootstrap problem of intelligence systems going down, when no one knows how to bring them back up without the system itself walking them through it... Like if power and intelligence were to go down in a Carrington-class event in 10 years...
Like what would happen to individuals ten years from now who are trying to live if AI suddenly became inaccessible
Of course we all know most humans are useless and unable to survive outside our culture, but the difference is that I'm trying to picture is the individual trying the reason through challenges. The version of this that has been obvious to me up to now is that the individual didn't have the knowledge to look after themselves. But I guess it feels different to conceive of them not having the ability to fully reason on their own...?
To not just lack the objects of intelligence, but the very process of it...
Sounds like a bad novel. In the year 2050 no one knows how to actually program anymore. Then ClaudeGPT by GoogleSoft goes down. A 74 year old former software developer is on his farm tending to hens.
A self driving car crashes into his barn.
Out comes out a tech bro, “Yo OG programmer bro, it’s all busted bro, could you like make it unbusted bro.”
Then again with social security set to go bankrupt it’s not like we’ll be able to retire
It's a real problem but your framing of it is itself very alarming.
Most humans aren't useless by any measure of most or usefulness. Our culture is our tools, dying due to a lack of antibiotics doesn't mean you didn't have anything to contribute, it means you didn't have access to the tool you needed. This is the problem we need to guard against.
No one is going to lose the ability to reason! This is accepting the most extreme version of the marketing presented by frontier labs, don't do it. People may lose fluency or familiarity or access to training on specific skills. We should put some care into making sure that can't be a catastrophe, for sure.
Too many OpenAI $200 customers switching over to Anthropic.
Given the amount of usage I'm now getting from Opus 5.5, I'm surprised it took this long since release for their first outage. In my experience, it's about 10x the usage of Fable 5.1 with similar, perhaps greater levels of intelligence.
Yeah, Fable 5.1 just seems Pareto-dominated. Opus 5.5 is the first model that feels like a step change for me, personally since like 4.6
Exactly, 5.5 is the first model that I used that's better than 4.6.
Fable5.1 is Speedy
"Update We are investigating reports of degraded performance ... We will provide an update as soon as possible.
Posted 1 minute ago. Sep 29, 2026 - 14:30 UTC Update We are investigating elevated error rates ... We will provide an update as soon as possible.
Posted 2 minutes ago. Sep 29, 2026 - 14:28 UTC Investigating We are investigating elevated error rates affecting Claude.ai ... We will provide an update as soon as possible."
just a hunch, but i think they might just provide an update as soon as possible.
Someone put update-status-page.pl in a one minute cron job.
Maybe an increase in sign ups due to people learning of their existence from the IPO? It's the authentication that seems to be failing, not the actual inference.
Yeah I had a session fail and keep failing.
https://status.claude.com/ says:
Elevated errors on claude.ai, Claude Code, Claude Cowork and the Claude API Subscribe Update - We are investigating reports of degraded performance affecting claude.ai, platform.claude.com, the Claude API, Claude Code, and Claude Cowork. We will provide an update as soon as possible. Sep 29, 2026 - 14:30 UTC Update - We are investigating elevated error rates affecting Claude.ai (including the desktop and mobile apps), Claude Code and Claude Cowork. Some requests to the Claude API are also returning errors. We will provide an update as soon as possible. Sep 29, 2026 - 14:28 UTC Investigating - We are investigating elevated error rates affecting Claude.ai (including the desktop and mobile apps), Claude Code and Claude Cowork. Users may see failed requests, errors loading or sending conversations, or be asked to sign in again; retrying may succeed. We will provide an update as soon as possible. Sep 29, 2026 - 14:21 UTC
Coding may have been solved, but uptime remains a mystery.
May I steal this quote as if it's mine? :bow:
You are trained now, it must be yours
It's on the internet now, inside the bellies of 1000 llms.
It's everyones.
Why do you need to say it's yours to use it? :p
You can get away with a lack of rigor in software engineering (from both humans and AI agaents) because it's often cheap to try it and see. Once you get to operating the platform, it changes, and operational decisions need to be made carefully and code needs to be deployed carefully.
Anthropic yesterday: We have perfect AI agents to do everything now, value us at $100 Trillion
Anthropic today: We don't really have AI agents, they are glorified versions of automation scripts and one has broken today. But tomorrow we will have perfect AI agents, so still value us at $100 Trillion.
I've seen many people with 500s for over an hour, meanwhile the status page was green with no issues whatsoever. Have they tried using a fraction of their immense budget to run E2E tests?
At this point downdetector is more reliable than any of these "status" pages. And it does show reports starting 9:30ish AM EST.
I've been getting 503s from the API. When I first checked everything was green, then it said "Claude.ai (including the desktop and mobile apps), Claude Code and Claude Cowork" and I see now they've included the API in the failure as well
Yesterday got email from Claude that they are offering 50% off for one month if I renew my subscription. I bought it today and now this. I wonder if they sent that email to too many people.
Maybe show respect to OpenAI DevDay
OpenAI has nothing better to do than to hack Anthropic?
Would be interesting to see how OpenAI and Anthropic would respond to being "accidentally" hacked by their respective Frankenstein monsters.
Imagine having a bunch of Claude agents doing time sensitive work and this happens and now a single human needs to pick up several 8k PRs authored by bots that can't talk to you now. Not sure how effective it would be to switch models using OpenRouter and the like given that, as the Earendil guys said, there is a lot of session detail that the provider doesn't share. The uptime is really going to cap their market penetration imo.
can't you say the say with imagine "power goes out" or the "internet goes out"?
(but yes if AI is going to propagate, they need to fix their uptimes)
No, you can't. Because power or internet doesn't go out globally.
Solar flares would like a word.
Neither electricity, nor the Internet is provided by one or two organizations globally, both with a blast radius that quite often takes out all of their services.
Not sure how long the latter will remain true – centralization is well underway there; try not to think of Cloudflare too much...
anyone can buy a backup generator for power
No worries, coding is solved they said in February 2026!
Isn't that a good news!
They probably have an OpenAI subscription, same for OpenAI SWE, they have a Claude Code subscription
They likely also have dedicated and separate clusters for their own use.
If so - for running Chinese models :trollface:
When I worked at one of the early paging and cellular companies, every company had phones and pagers on at least one or two competitors for the oncall folks - you can't get a call to fix your cellular network when you are down.
Likewise while at Google, they didn't let us put Google Voice numbers down as our oncall phone number. Some folks even had multiple phones on different networks as backups.
I'm sure they have either other SOTA models or open source models around to help if things to completely pear shaped.
Never thought of it, but knowing that they encrypt reasoning is it possible that they share the decryption keys with other cloud providers like GCP Vertex / AWS Bedrock?
The NSA wants a word.
They don't, no (last that I looked) – if you switch providers, encrypted reasoning no longer works.
They don’t even share the reasoning keys between *models in the same model family*.
Opus isn’t even allowed to decrypt thinking blocks from Fable if you switch models mid-conversation.
https://platform.claude.com/docs/en/build-with-claude/preser...
PRs shouldn't really be reaching 8k diffs no matter who authors them.
PRs shouldn't really be reaching 8k diffs no matter who authors them.
There's an ocean between what "should" happen and what actually happens in tech today.
Given that CI is turning out to be a bottleneck - and a real pain for chainedd PR's - I have my hesitations on this.
Berget Code is running normal https://berget.ai/code
Who?
Berget's "Cached input tokens are billed at the same rate as regular input tokens" pricing model is kind of painful for lots of coding use-cases, especially when competitors are offering significant discounts for cached input tokens.
It's bad etiquette to not mention you are a founder of something you are trying to plug
If I can't use it I just sit there. That's the fallback now.
The auto mode classifier has been out of service more than once in last 24 hours.
Had to shift+tab into other modes and manually approve permissions like a cave man
Ah, so disabling auto-mode is their monkey rate limiter.
Project completely disappeared. Conveniently for Anthropic, the bug report also went down, so they weren't spammed by my stale complaints after the project magically resurfaced.
Why can they simply not add more computer?
DRAM
Claude outages are now the new go outside and touch grass indicator
Previous: GitHub outage
Oh come on, I just had my weekly limit reset.
Hey, it's 99.9 if you look at it upside down.
Uptime of the Beast
6.66% uptime? Give github a few years they'll get there
Claude, deploy to prod - make no mistakes!
A usage reset would be a much appreciated apology. :)
Sorry guys it's my fault I started using anthropic models yesterday.
Jup, all currently running containers got deleted on my account. Hope you guys got your stuff pushed to somewhere before the outage.
I'm not sure this is even conceivable, but... Imagine the bootstrap problem of intelligence systems going down, when no one knows how to bring them back up without the system itself walking them through it... Like if power and intelligence were to go down in a Carrington-class event in 10 years...
Like what would happen to individuals ten years from now who are trying to live if AI suddenly became inaccessible
Of course we all know most humans are useless and unable to survive outside our culture, but the difference is that I'm trying to picture is the individual trying the reason through challenges. The version of this that has been obvious to me up to now is that the individual didn't have the knowledge to look after themselves. But I guess it feels different to conceive of them not having the ability to fully reason on their own...?
To not just lack the objects of intelligence, but the very process of it...
Some of us are here to help. $1000/hr.
A few of us old boys can still maintain Cobol
Exactly what I was thinking.
Sounds like a bad novel. In the year 2050 no one knows how to actually program anymore. Then ClaudeGPT by GoogleSoft goes down. A 74 year old former software developer is on his farm tending to hens.
A self driving car crashes into his barn.
Out comes out a tech bro, “Yo OG programmer bro, it’s all busted bro, could you like make it unbusted bro.”
Then again with social security set to go bankrupt it’s not like we’ll be able to retire
Thinking more a mashup of The Matrix and Idiocracy with Doc Brown as the Hero retired Programmer. Or Rick.
This is why it will be more important than ever to have experienced, quality employees.
I dare companies to gamble on running their businesses on absolute skeleton crews long term
"The Machine Stops"
It's a real problem but your framing of it is itself very alarming.
Most humans aren't useless by any measure of most or usefulness. Our culture is our tools, dying due to a lack of antibiotics doesn't mean you didn't have anything to contribute, it means you didn't have access to the tool you needed. This is the problem we need to guard against.
No one is going to lose the ability to reason! This is accepting the most extreme version of the marketing presented by frontier labs, don't do it. People may lose fluency or familiarity or access to training on specific skills. We should put some care into making sure that can't be a catastrophe, for sure.
Keep an offline copy of Qwen or something together with a knowledge base. Easy if you plan ahead.