Anthropic is investigating elevated error rates across its Claude AI services, including the Claude API, causing disruptions for users. The outage affects Claude.ai, Claude Code, and Claude Cowork, with some requests failing or requiring repeated attempts.
TL;DR
- Anthropic's Claude AI services, including the API, are experiencing high error rates, causing service disruptions.
- The outage affects Claude.ai, Claude Code, and Claude Cowork, impacting users and third-party developers.
- This is the second incident in a week, raising questions about the stability of Anthropic's services.
What happened
Anthropic reported high error rates across its Claude AI services, including Claude.ai, Claude Code, Claude Cowork, and the Claude API. Users have reported failed requests, difficulties loading conversations, and prompts to sign in again. The incident was initially listed as 'Investigating' at 14:21 UTC, with an update at 14:28 UTC confirming the Claude API was also affected.
This outage occurred less than a week after a previous incident on September 22, where errors affected several Claude models, including Opus 5, Mythos 5.1, and Fable 5.1. That incident was resolved after about one hour and thirty-eight minutes, according to a third-party archive of Anthropic's status data.
Why it matters
The outage impacts Claude.ai, Anthropic's primary consumer-facing interface, as well as Claude Code and Cowork, which are increasingly used for development and business purposes. An interruption to the API can also affect third-party products built on Claude, potentially disrupting workflows for developers and businesses.
This is the second incident in a week, raising concerns about the stability and reliability of Anthropic's services. The frequency of these incidents could impact user trust and the adoption of Claude AI services.
Key facts
- Anthropic is investigating high error rates across Claude AI services, including the API.
- The outage affects Claude.ai, Claude Code, and Claude Cowork.
- Users report failed requests, difficulties loading conversations, and prompts to sign in again.
- The incident was initially listed as 'Investigating' at 14:21 UTC, with an update at 14:28 UTC.
- This is the second incident in a week, following a previous outage on September 22.
- The previous incident affected Claude models Opus 5, Mythos 5.1, and Fable 5.1 and was resolved after about one hour and thirty-eight minutes.
- Anthropic has not yet stated the reason for the disruption or when normal service will be resumed.
Context
Anthropic's Claude AI services have been gaining traction in both consumer and business markets. Claude.ai serves as the primary interface for consumers, while Claude Code and Cowork cater to developers and businesses. The Claude API enables third-party developers to build applications on top of Claude's capabilities.
The recent outages highlight the importance of reliability and stability in AI services, especially as they become more integrated into business workflows and consumer applications. For AI/ML developers, startup founders, and tech investors, these incidents underscore the need for robust infrastructure and contingency planning.
