On August 16, 2026, Anthropic's Claude services experienced a major outage, starting at 21:58 UTC, affecting Claude.ai, Claude Code, and Claude Cowork. The disruption caused login issues and degraded performance for users.
TL;DR
- Anthropic's Claude services experienced a major outage affecting 21M users.
- The outage began at 21:58 UTC on August 16, 2026, and was resolved by 22:40 UTC.
- The disruption impacted Claude.ai, Claude Code, and Claude Cowork, causing login problems and degraded performance.
What happened
Anthropic confirmed a major outage affecting its Claude services on August 16, 2026. The incident began at 21:58 UTC and initially involved authentication issues preventing users from accessing Claude.ai, Claude Code, and Claude Cowork. Within minutes, the outage expanded to include degraded performance on Claude.ai and platform.claude.com.
Users reported problems signing in, Claude failing to load, and requests not completing. Anthropic's status page classified the outage as major for Claude.ai, Claude Code, and Claude Cowork, while Claude Console and the Claude API remained operational. The cause of the outage was not disclosed, and both incidents were under investigation at the time of the initial reports.
Why it matters
This outage highlights the vulnerability of AI services to disruptions, which can significantly impact users and businesses relying on these tools. For developers and startups, this incident underscores the importance of robust infrastructure and contingency plans to minimize downtime and maintain user trust.
For investors, the outage serves as a reminder of the operational risks associated with AI services. While such incidents are not uncommon, their frequency and severity can influence the perceived stability and reliability of AI companies, potentially affecting their valuation and investor confidence.
Key facts
- The outage began at 21:58 UTC on August 16, 2026.
- Affected services include Claude.ai, Claude Code, and Claude Cowork.
- The outage was resolved by 22:40 UTC.
- Claude Console and the Claude API were not affected.
- Anthropic has not disclosed the cause of the outage.
- The outage impacted 21M users of the affected services.
- Anthropic's status page classified the outage as major.
- The incident involved both authentication issues and degraded performance.
Context
Anthropic is a leading AI company known for its Claude services, which include AI-powered tools for various applications. The company has been focusing on enhancing the reliability and performance of its services to meet the growing demand for AI solutions. This outage, while resolved, serves as a reminder of the challenges in maintaining seamless service in the rapidly evolving AI landscape.
