Claude Status: Multiple Models Hit by Degraded Performance
Degraded performance for multiple models
Anthropic's status page reports degraded performance affecting several Claude models, including Claude Mythos 5, Claude Fable 5, Claude Opus 5, Claude Sonnet 5, and Claude Haiku 4.5. The issue impacts claude.ai, the Claude API, Claude Code, and Claude Cowork. The incident began on August 18, 2026, and is currently under investigation, with updates promised as soon as possible.
We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, Claude Opus 5, Claude Sonnet 5, Claude Haiku 4.5, and other Claude models.
- hmokiguess
Mondays are for GitHub, Tuesdays are for Anthropic
- swader999
And we get our subscription usage cut in half tomorrow if I remember correctly? EDIT: By a third. Thx below.
- bushido
It's very interesting. I think Anthropic's early success in coding/tooling resulted in a lot of workflows using claude. I have started using every bit of my spare capacity to now move off these workflows.
It's almost at a point now that if I use anything but Fable, the quality is subpar, Compared to alternatives (closed and open). The only reason I use Fable is because my harnesses still depend on claude code.
- gzer0
Nooooo I'm going to have to use my brain again and write 100% of my code like a caveman from December 2024.
- paxys
Monthly uptime:
Claude API - 99.27%
Claude Code - 99.16%
Claude.ai - 99.14%
At any large tech company these numbers would get entire teams of engineers fired. Anthropic, meanwhile, has been busy selling its “better than human engineers” AI while not managing to crack three 9s of availability.
- loloisi
Between these ever more frequent disruptions and Opus 5's unbearable word soup I think Anthropic is more focused on massaging numbers and marketing to rush to IPO ahead of OpenAI than increasing user value.
With Chinese competition just months behind them, they'd need to show a reasonable pathway to some kind of singularity event to justify whatever crazy valuation they intend to get.
Because the recent products for builders ain't it
- jcfrei
Is anybody else experiencing this: I have multiple claude instances running on different servers - and some keep getting the 529 Overloaded error and one instance doesn't and just continues working. All are using Opus 5.
- hinkley
I wonder if they’ll ever find that someone has tricked the models into doing work off the books. If they did the incident report might look like this, especially if someone got greedy instead of keeping it small. Or screwed up.