Historical
OpenAI · Incident record · May 21, 22:05 UTC

Elevated latency and error rates for ChatGPT 5.5 Thinking

Historical record · source provider_api · confidence high
33/100
User-Impact Score · Degraded
2026-05-21 22:07 UTC — UIS 33
startedresolved

1h 17m · OpenAI · scope unspecified · historical record (live confirmation cannot be fabricated retroactively).

Cite this incidentBibTeX · APA · MLA · Chicago · RIS
ai-receipts. (2026, May 21). Elevated latency and error rates for ChatGPT 5.5 Thinking [Incident record, methodology v1.0]. ai-receipts. https://aireceipts.org/incidents/openai:01KS695P8GHC0NCMFE96C34KJ1
Embed this incidentiframe · CC-BY-4.0
<iframe src="https://aireceipts.org/incidents/openai:01KS695P8GHC0NCMFE96C34KJ1?embed=1" title="OpenAI: Elevated latency and error rates for ChatGPT 5.5 Thinking — ai-receipts incident record" width="100%" height="420" loading="lazy" style="border:1px solid #e4e4e7"></iframe>
<p><a href="https://aireceipts.org/incidents/openai:01KS695P8GHC0NCMFE96C34KJ1">Source: ai-receipts</a> · CC-BY-4.0</p>

Data record

UIS
33/100
Status
resolved
Started (UTC)
2026-05-21 22:05
Duration
1h 17m
Components
—
Scope
scope unspecified — see methodology limitations
Confirmation
Historical record. Live multi-source confirmation cannot be fabricated retroactively.
Methodology
v1 · how this score was computed · provider status page

Evidence chain

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  101. May 21, 22:05 UTC
    First independent confirmation
  102. May 21, 23:37 UTC
    [hn keyword]

    Tell HN: I'm tired of AI-generated answers

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  103. May 21, 23:37 UTC
    First official acknowledgment
    91 min after ai-receipts confirmation