Anthropic's Claude AI Suffers Global Outage, Disrupting Web and Code Services
Anthropic's AI assistant Claude experienced a widespread outage affecting web and code services globally, with users reporting slow, unstable, or unavailable responses.
Anthropic's widely-used AI assistant, Claude, experienced a significant global disruption on June 2, 2026, impacting both its web-based chat interfaces and code-related services. Users across various regions reported experiencing slow, unstable, or completely unavailable responses, beginning around 2:10 AM ET (7:10 AM GMT). The surge in user complaints was clearly visible on outage tracking websites, indicating a broad impact on both free and paid users.
Initially, Anthropic's official status page classified the incident as a "partial outage," acknowledging elevated error rates across key Claude services and stating that remediation efforts were underway. While the company later updated the page to indicate that a fix had been deployed and was being monitored, many users continued to report persistent issues, suggesting a gradual recovery process rather than an immediate resolution. The problems were not confined to a single platform, with reports emerging from users accessing Claude via its web chat, mobile applications, and Claude Code.
Anthropic eventually pinpointed the cause to "elevated errors on Opus 4.6," the company's flagship model released in February. Concurrently, users reported that sessions utilizing the Sonnet 4.6 model were also affected, often hanging indefinitely with messages like "gathering my thoughts" or "still working on it." For some, requests eventually processed after considerable delays, while others faced outright failures or timeouts. A particularly contentious aspect of the outage involved the free tier, where some users received a message citing "unexpected capacity constraints" and suggesting an upgrade to a Pro plan, a response that many found ill-timed given the underlying platform instability.
As mitigation efforts progressed, outage reports began to decline, with tracking sites showing a significant drop in user-submitted issues. Anthropic's status page eventually transitioned to an "all systems operational" state. However, even after this declaration, some users continued to observe slower-than-normal response times and intermittent failures, indicating that full service normalization might have taken additional time.
This widespread outage underscores a growing concern within the cybersecurity community regarding the increasing reliance on single AI providers for critical business operations and workflows. As organizations increasingly integrate AI assistants like Claude into their daily processes, often migrating from other platforms such as ChatGPT, incidents like this highlight the inherent risks. The disruption serves as a stark reminder of the need for robust multi-vendor strategies and comprehensive fallback plans.
Furthermore, the event emphasizes the importance of clear and timely incident communication from AI service providers. When core AI infrastructure experiences significant downtime, users need transparent updates to manage expectations and adjust their operational strategies accordingly. The ability to pivot to alternative solutions or to effectively communicate delays is crucial for maintaining business continuity in an AI-dependent landscape.
The incident also raises questions about the capacity management and error handling within large-scale AI models. While the "capacity constraints" message on the free tier might have been a symptom of the broader issue, it highlighted user frustration and potential revenue-generating opportunities during a critical service failure. This aspect warrants further scrutiny regarding how AI providers manage resource allocation and communicate limitations during outages.
Ultimately, the Claude outage serves as a critical case study for businesses and security professionals alike. It reinforces the need for resilience in AI adoption, advocating for diversification of AI tools and services, and demanding greater transparency and reliability from AI infrastructure providers to mitigate the risks associated with over-dependence.
SentinelOne has announced integrations with Anthropic's Claude AI, aiming to provide enhanced visibility, governance, and defense for enterprise AI adoption. This new integration allows security teams to monitor AI prompts and responses, ingest Claude activity into the Singularity AI SIEM for correlation, and leverage AI for exploitability-grounded vulnerability prioritization, addressing risks like data exposure and prompt injection.
The outage, which began on June 5, 2026, affected claude.ai, API services, Claude Code, and Cowork. Anthropic engineers attributed the disruption to infrastructure issues rather than a security breach, though concerns about potential data exposure were raised. This incident follows a January advisory detailing a vulnerability in Claude Code that could exfiltrate API keys, highlighting risks associated with single-vendor AI dependencies.