{"slug": "anthropic-investigates-authentication-errors-hitting-claude-ai-and-claude-code", "title": "Anthropic investigates authentication errors hitting Claude AI and Claude Code", "summary": "Anthropic is investigating elevated authentication errors that began at approximately 09:58 UTC on November 13, 2026, affecting logins to claude.ai, Claude Code, and platform.claude.com, with components classified as partial or major outages. Users reported expired credentials, outright authentication failures, and errors tied to credential precedence and expired OAuth sessions, and Anthropic had not announced a resolution as of its latest status update. The incident follows a similar authentication episode on September 29, 2026, and earlier 2026 session-token thefts tied to infostealer malware, which Anthropic has not linked to the current errors.", "body_md": "# Anthropic investigates authentication errors hitting Claude AI and Claude Code\n\nAnthropic / Wikimedia Commons (Public domain)\n\nLogin failures across claude.ai, Claude Code, and platform.claude.com mark the latest in a string of sign-in problems for the AI company\n\n[Anthropic](https://cryptobriefing.com/markets/anthropic/) is investigating elevated authentication errors affecting Claude AI and Claude Code. Some users are unable to log in to the tools they rely on every day.\n\nThe company’s status page logged the incident as starting at approximately 09:58 UTC on November 13, 2026.\n\n## What’s broken, and where\n\nThe disruption reaches well beyond the consumer chat app. Anthropic’s status page listed claude.ai, Claude Code, and platform.claude.com among the affected services.\n\nAnthropic described the issue as **elevated errors tied to user authentication**. That wording points to a problem on the company’s side, not a crowd of users who all forgot their passwords at the same moment.\n\nDifferent components were classified as experiencing either a partial or a major outage. The severity varied depending on which part of the service users were trying to reach.\n\nUsers have described a range of symptoms. Reports include expired credentials, outright authentication failures, and errors tied to credential precedence and expired OAuth sessions.\n\nOAuth is the system that lets you sign in once and stay signed in through a digital token, so you aren’t retyping a password every few minutes. Credential precedence refers to which login method a tool trusts first when it finds more than one available.\n\n### AI, tech, and the markets they move—in one daily briefing.\n\nDaily. Free. Join 34,000+ readers across crypto, finance, and policy.\n\nAs of the latest update, Anthropic had not announced a resolution. The company has said it will keep users informed as the investigation continues.\n\n## Not the first lockout this year\n\nThis incident does not arrive in a vacuum. On September 29, 2026, Anthropic dealt with a similar episode involving elevated authentication errors and sign-in issues.\n\nThe recurring nature of these problems has historically produced widespread confusion and frustration among users, who often can’t tell whether the fault lies with their own setup or with Anthropic.\n\nEarlier in 2026, session-token theft incidents were reported, tied to infostealer malware. Those incidents led to unauthorized usage of accounts and to account suspensions.\n\nInfostealers are malicious programs that sit quietly on a victim’s computer and copy saved logins and session data. A stolen session token works a lot like a valet ticket: whoever holds it can drive off with the car, and nobody asks for ID.\n\nThe available reports do not tie the current errors to that theft. One involves outsiders getting in where they shouldn’t. The other involves legitimate users being kept out of accounts they own.\n\n## What this means for Claude users and Anthropic\n\nFor individual users, an authentication outage is a particularly maddening kind of failure. A capable AI model does you no good if you can’t get past the login screen to use it.\n\nWith Claude Code and platform.claude.com both in the affected list, people who have built Anthropic’s tools into their daily workflows could see that work grind to a halt until access is restored.\n\nAnthropic’s AI tools are seeing greater adoption, which means more people are depending on them. Continued service disruptions could deter new users and affect subscription rates, an important metric for measuring the success of their growing platform.\n\n**Disclosure:** This article was edited by Diego Almada Lopez. For more information on how we create and review content, see our [Editorial Policy](https://cryptobriefing.com/editorial-policy/).", "url": "https://wpnews.pro/news/anthropic-investigates-authentication-errors-hitting-claude-ai-and-claude-code", "canonical_source": "https://cryptobriefing.com/anthropic-investigates-claude-authentication-errors/", "published_at": "2026-11-13 10:34:46+00:00", "updated_at": "2026-11-13 10:53:23.063873+00:00", "lang": "en", "topics": ["artificial-intelligence", "ai-products", "ai-tools", "ai-agents"], "entities": ["Anthropic", "Claude", "Claude Code", "claude.ai", "platform.claude.com"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/anthropic-investigates-authentication-errors-hitting-claude-ai-and-claude-code", "markdown": "https://wpnews.pro/news/anthropic-investigates-authentication-errors-hitting-claude-ai-and-claude-code.md", "text": "https://wpnews.pro/news/anthropic-investigates-authentication-errors-hitting-claude-ai-and-claude-code.txt", "jsonld": "https://wpnews.pro/news/anthropic-investigates-authentication-errors-hitting-claude-ai-and-claude-code.jsonld"}}