Elevated errors on Claude Haiku 4.5

highAnthropicClaude APIMar 4, 2026 15:58Duration: 1h 53m

api

API Issue

Summary

This incident has been resolved.

Impact

major

Timeline

Feb 23, 2026 14:06

[investigating] We are currently investigating this issue.

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+1m

Feb 23, 2026 14:07

[investigating] We are continuing to investigate this issue.

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+47m

Feb 23, 2026 14:54

[identified] The issue has been identified and a fix is being implemented.

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+3m

Feb 23, 2026 14:57

[monitoring] A fix has been implemented and we are monitoring the results.

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+1h 2m

Feb 23, 2026 15:59

[resolved] This incident has been resolved.

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+169h 56m

Mar 2, 2026 17:56

[investigating] We are currently investigating this issue.

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+11m

Mar 2, 2026 18:07

[monitoring] A fix has been implemented and we are monitoring the results.

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+11m

Mar 2, 2026 18:18

[investigating] We are seeing a repeat of this issue, we are currently investigating.

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+36m

Mar 2, 2026 18:54

[monitoring] A fix has been implemented and we are monitoring the results.

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+2h 22m

Mar 2, 2026 21:16

[resolved] This incident has been resolved.

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+17h 35m

Mar 3, 2026 14:51

[investigating] We are currently investigating this issue.

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+49m

Mar 3, 2026 15:39

[resolved] This incident has been resolved.

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+23h 8m

Mar 4, 2026 14:47

[investigating] We are currently investigating this issue.

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+8m

Mar 4, 2026 14:55

[resolved] The incident for Haiku 4.5 has been between 6:45 PT / 14:45 UTC and 6:50 PT / 14:50 UTC.

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+1h 3m

Mar 4, 2026 15:58

[investigating] The earlier issues with Haiku 4.5 have reappeared.

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+15m

Mar 4, 2026 16:13

[monitoring] A fix has been implemented and we are monitoring the results.

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+48m

Mar 4, 2026 17:01

[resolved] Errors have returned to the baseline as of 8:08 PT / 16:08 UTC.

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+68h 57m

Mar 7, 2026 13:58

[investigating] We are currently investigating this issue.

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+3h

Mar 7, 2026 16:58

[resolved] Today between 5:35 PT / 13:35 UTC and 6:44 PT / 14:44 UTC Haiku 4.5 had an elevated error rate. We are now at the baseline error rate.

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Lessons Learned

⚠Anthropic has experienced 33 incidents in the past year. This frequency suggests systemic reliability challenges that may warrant additional monitoring.

📊Incidents related to api have occurred 182 times across all providers in the past year. This is one of the most common failure categories in cloud infrastructure.

💡This incident is categorized as: API Issue. Consider implementing preventive measures specific to this failure category.