Model usage attribution issues

Incident Report for Claude

Resolved

We've identified and mitigated the issue. We've also reset usage limits for all users.
Posted Nov 24, 2025 - 19:43 UTC

Investigating

We're investigating an issue where some users' Sonnet model usage was counted as Opus usage.
Posted Nov 24, 2025 - 18:15 UTC
This incident affected: claude.ai, Claude API (api.anthropic.com), and Claude Code.