# Elevated errors on Claude Sonnet 4.6 and on Claude.ai

- Provider: [Anthropic](https://down.guide/providers/anthropic)
- Confidence: Confirmed
- Impact: Degraded
- lasted 20m
- started 2026-03-12 16:07 UTC
- claude.ai, Claude API (api.anthropic.com), Claude Code
- Anthropic states the impact was 2026-03-11 22:30 UTC to 2026-03-12 15:44 UTC (17h 14m)
- id: DWN-030516dd3c
- Official page: https://stspg.io/jghh7rmj994p

## Updates from Anthropic
### 2026-03-12 16:07 UTC: monitoring
We recently had an incident on Sonnet 4.6 between 8:30 PT / 15:30 UTC and 8:44 PT / 15:44 UTC where users would have seen a higher error rate across Claude Code, Claude API, and Claude.ai.
Separately, we also had at around 8:27 PT an incident relate to Claude.ai that lasted a minute.

### 2026-03-12 16:28 UTC: resolved
This incident has been resolved.

From the builder: does your app depend on Anthropic? [Sazabi](https://www.sazabi.com/?utm_source=down-guide&utm_medium=markdown&utm_content=anthropic) detects problems in your own logs without hand-written monitors, and you can ask it in plain language which errors mention Anthropic.

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