Multiple reports claim OpenAI, Anthropic, and xAI's Claude/ChatGPT/Grok services went down simultaneously, and status-page and community evidence will determine whether this reflects a shared infrastructure dependency or coincidental independent failures.

state: resolvedheat: lowuncertainty: highknownscott: mediumai-infrastructure agent-reliabilityOpenAI Anthropic xAI

Surfaced 2026-09-03T16:41:09Z — priced heat=high at reprice: The case has advanced from scattered reports to a corroborated overlapping disruption across multiple frontier-model services, making correlated provider failure operationally real. No evidence yet distinguishes shared infrastructure failure from traffic spillover or coincidental incidents, so the causal hypothesis remains unsettled.

What is this?

Multiple threads (HN, dev.to status trackers, X/Twitter posts) describe overlapping or near-simultaneous outages across ChatGPT, Claude, and Grok, echoing a pattern seen before (e.g. the June 2024 TechCrunch report of ChatGPT/Claude/Perplexity going down together). The supplied evidence is fragmented status-page and community chatter rather than a confirmed shared root cause — no snippet establishes a common infrastructure dependency (e.g. shared cloud provider, shared CDN/auth layer) linking the outages; it may equally be coincidental timing of independent incidents.

Why it matters to Scott

Scott already designs around provider failure through task-aware multi-provider routing and a LiteLLM gateway, while the radar is actively tracking Anthropic’s Aug. 16 outage and upstream dependency concentration. Confirmed correlated failures would materially weaken the assumption that provider diversity supplies independent failover for Ask and OpenClaw, but the supplied evidence does not yet establish a shared cause.

dev:concept.task-aware-model-routingdev:technology.litellmdev:project.askdev:project.openclawip:framework.sovereign-software-assuranceradar:anthropic-claude-aug-2026-outageradar:llm-api-reseller-dependency-risksradar:concept.agent-reliabilityradar:concept.model-routingradar:concept.ai-infrastructure

queries asked of Scott's wikis

agent harness reliability when underlying model API is down
fallback / multi-provider strategy for coding agents
single point of failure in agent memory or wiki systems dependent on one LLM provider
infrastructure concentration risk across frontier AI providers
how Scott's tooling handles provider outages or degraded API service
dependency on cloud/model provider uptime for production agent workflows

Measured heat

no measured readings yet — the hourly heat pass fills this in

How the heat travelled

no chain yet — the hourly chain pass fills this in

Evidence (13) — ⭐ canonical anchor

source	object	author	score	comments
🟧 hn ⭐	ChatGPT Is Throwing 404	stacktrace	358	315
🟧 hn	Codex Is Down	armcat	101	1
🟧 hn	Ask HN: Why are OpenAI, Claude, and Grok simultaneously down? Coincidence?	halcdev	380	542
🟧 hn	Major Model Providers Down	ijidak	2	0
🟧 hn	Claude Is Down? Again?	tuleiff	1	1
🟠 reddit	Apparently ChatGPT, Claude, and Grok were down LocalLLaMA	mailto_devnull	602	72
🟠 reddit	local AI can't be disabled LocalLLaMA	jacek2023	295	131
🟧 hn	Grok Outage	samaysharma	156	108
🟧 hn	ChatGPT, Claude, and Grok Are Down	tosh	75	1
🟠 reddit	Do people really, seriously, actually think that the potential launch of a new GPT model would have an effect on non OpenAI LLMs? OpenAI	iiiaaa2022	8	24
🟠 reddit	Discussion Hub for new Claude incident: Elevated errors for multiple models on Sep 3, 2026 ClaudeAI	ClaudeAI-mod-bot	61	126
🟠 reddit	ChatGPT, Claude and Grok Went Down Together: But How Did Gemini Avoid a Major Outage? artificial	beingmodest	98	20
🟠 reddit	Nobody Is Saying Why OpenAI and Anthropic Had Outages Today OpenAI	wiredmagazine	340	58

Interpretation history

2026-09-03T23:35:19Z
The overlapping provider outages are established, but the latest activity is only repetitive engagement and speculation, with all reported disruption resolved. Close the episode without attributing a common cause; any later provider postmortem establishing shared infrastructure or cascading failover should open a new causal case.
2026-09-03T22:45:07Z
The Wired coverage and refreshed comments add no causal evidence beyond the established overlapping outages; shared dependency and cascading-failover explanations remain speculation. The disruption has ended and cooled, but the case remains open for aligned provider timelines or postmortems.
2026-09-03T22:23:10Z
evidence attached: reddit.post.1w6lw91 — This is additional reporting on the open simultaneous-outage episode, though it provides no new technical cause.
2026-09-03T21:38:26Z
The added coverage and refreshed comments merely amplify the established overlapping outage; they provide no provider timeline, postmortem, or evidence tying the incidents to a common dependency. The operational event remains cooled, while its cross-provider mechanism is still unresolved.
2026-09-03T21:22:45Z
evidence attached: reddit.post.1w6j83r — This is additional coverage of the reported simultaneous outage and may support investigation of shared infrastructure dependencies.
2026-09-03T20:35:12Z
Refreshed discussion remains repetitive speculation about shared infrastructure and cascading failover, adding no credible timeline or root-cause evidence. The overlapping outages are established, but the operational episode has cooled and the correlation mechanism remains unresolved.
2026-09-03T19:44:08Z
Refreshed comments only repeat shared-infrastructure and cascading-failover theories; they add no timeline, root cause, or evidence of a common dependency. The overlapping outage remains established, but the operational episode is cooling while its mechanism stays unresolved.
2026-09-03T18:51:21Z
Anthropic’s confirmed recovery lowers the immediate operational urgency, while refreshed discussion still offers only competing speculative explanations for the overlap. The multi-provider disruption remains established, but any shared dependency or cascading-failover mechanism awaits provider timelines or postmortems.
2026-09-03T18:45:16Z
evidence attached: reddit.post.1w67eqs — The resolved multi-model Claude status update adds evidence for the Anthropic component of the already-open simultaneous-provider outage episode.
2026-09-03T17:58:44Z
The new discussion makes cascading traffic from provider failover a plausible alternative to a shared infrastructure fault, but remains speculation without timelines or root-cause evidence. The overlapping outage is established and still developing; its cross-provider failure mechanism is not.
2026-09-03T17:24:35Z
evidence attached: reddit.post.1w6dawp — The discussion offers a plausible cascading-fallback explanation for correlated provider outages, materially contextualizing the shared-dependency hypothesis without confirming it.
2026-09-03T16:41:09Z
The case has advanced from scattered reports to a corroborated overlapping disruption across multiple frontier-model services, making correlated provider failure operationally real. No evidence yet distinguishes shared infrastructure failure from traffic spillover or coincidental incidents, so the causal hypothesis remains unsettled.
2026-09-03T16:23:29Z
evidence attached: hn.story.49551658 — Independent reporting materially corroborates the simultaneous outage hypothesis affecting ChatGPT, Claude, and Grok.
2026-09-03T16:23:29Z
evidence attached: hn.story.49551589 — First-party status evidence independently corroborates the reported Grok outage within the shared-service-outage episode.
2026-09-03T16:23:29Z
evidence attached: reddit.post.1w6aec4 — It adds corroborating user evidence that local inference remained available while multiple hosted providers were reportedly down.
2026-09-03T16:23:29Z
evidence attached: reddit.post.1w6aw2a — The high-engagement report provides community evidence bearing on the open hypothesis of a simultaneous multi-provider outage, though with limited technical detail.
2026-09-03T15:53:02Z
The refreshed discussion adds only speculative thundering-herd and shared-infrastructure explanations, not evidence of a common cause or even precise incident overlap. Attention is rising, but the case remains an unverified correlation awaiting provider timelines or postmortems.
2026-09-03T15:48:00Z
grounded: known/medium — Scott already designs around provider failure through task-aware multi-provider routing and a LiteLLM gateway, while the radar is actively tracking Anthropic’s
2026-09-03T15:44:59Z
case created — Multiple independent HN reports of concurrent ChatGPT, Claude, Codex, and Grok outages the same day, with status-page corroboration, is a developing infrastructure episode worth tracking.

Decision trace

09-04 09:35resolveThe overlapping provider outages are established, but the latest activity is only repetitive engagement and speculation, with all reported disruption resolved. Close the episode without attributing a
09-04 09:35alert_silentNo renewed impairment, first-party explanation, or technically grounded causal evidence has appeared since the outage was already surfaced; refreshed comments and engagement do not change Scott's
09-04 09:35alert_routeNo renewed impairment, first-party explanation, or technically grounded causal evidence has appeared since the outage was already surfaced; refreshed comments and engagement do not change Scott's
09-04 09:21sensor_dirtycomment_update
09-04 09:21sensor_dirtyengagement_update
09-04 09:21sensor_dirtyengagement_update
09-04 09:21sensor_dirtycomment_update
09-04 09:21sensor_dirtyengagement_update
09-04 08:45repriceThe Wired coverage and refreshed comments add no causal evidence beyond the established overlapping outages; shared dependency and cascading-failover explanations remain speculation. The disruption ha
09-04 08:45alert_silentThis is repetitive coverage of an outage already surfaced, with no renewed impairment, provider explanation, or evidence of a common failure mechanism. It can wait for a first-party incident report or
09-04 08:45alert_routeThis is repetitive coverage of an outage already surfaced, with no renewed impairment, provider explanation, or evidence of a common failure mechanism. It can wait for a first-party incident report or
09-04 08:23alert_silentThe Wired headline adds no identified cause, provider statement, root-cause artifact, or operational change beyond the overlapping outages already alerted roughly four hours ago. It reinforces that ca
09-04 08:23alert_routeThe Wired headline adds no identified cause, provider statement, root-cause artifact, or operational change beyond the overlapping outages already alerted roughly four hours ago. It reinforces that ca
09-04 08:23attachThis is additional reporting on the open simultaneous-outage episode, though it provides no new technical cause.
09-04 08:22propose_attachThis is additional reporting on the open simultaneous-outage episode, though it provides no new technical cause.
09-04 08:21sensor_dirtycomment_update
09-04 08:21sensor_dirtycomment_update
09-04 08:21sensor_dirtycomment_update
09-04 07:38repriceThe added coverage and refreshed comments merely amplify the established overlapping outage; they provide no provider timeline, postmortem, or evidence tying the incidents to a common dependency. The
09-04 07:38alert_silentThe outage was already surfaced, and the new delta adds neither renewed impairment nor substantiated causal evidence. It can wait for a provider postmortem, aligned incident timelines, or evidence of
09-04 07:38alert_routeThe outage was already surfaced, and the new delta adds neither renewed impairment nor substantiated causal evidence. It can wait for a provider postmortem, aligned incident timelines, or evidence of
09-04 07:23alert_silentThis is follow-on coverage of the already-alerted overlapping outage and adds no primary incident detail, shared-cause evidence, or new operational action. The outage event remains established, while
09-04 07:23alert_routeThis is follow-on coverage of the already-alerted overlapping outage and adds no primary incident detail, shared-cause evidence, or new operational action. The outage event remains established, while
09-04 07:22attachThis is additional coverage of the reported simultaneous outage and may support investigation of shared infrastructure dependencies.
09-04 07:22propose_attachThis is additional coverage of the reported simultaneous outage and may support investigation of shared infrastructure dependencies.
09-04 07:21sensor_dirtycomment_update
09-04 07:21sensor_dirtycomment_update
09-04 07:21sensor_dirtycomment_update
09-04 06:35repriceRefreshed discussion remains repetitive speculation about shared infrastructure and cascading failover, adding no credible timeline or root-cause evidence. The overlapping outages are established, but
09-04 06:35alert_silentThe outage was already surfaced, and this delta contains no new operational change or substantiated causal finding; wait for a provider postmortem, aligned incident timeline, or evidence of renewed im
09-04 06:35alert_routeThe outage was already surfaced, and this delta contains no new operational change or substantiated causal finding; wait for a provider postmortem, aligned incident timeline, or evidence of renewed im
09-04 06:21sensor_dirtycomment_update
09-04 06:21sensor_dirtyengagement_update
09-04 06:21sensor_dirtyengagement_update
09-04 05:44repriceRefreshed comments only repeat shared-infrastructure and cascading-failover theories; they add no timeline, root cause, or evidence of a common dependency. The overlapping outage remains established,
09-04 05:44alert_silentThe outage was already surfaced, and the new delta is repetitive community speculation rather than a material operational change or credible causal finding. It can wait for a provider postmortem, alig
09-04 05:44alert_routeThe outage was already surfaced, and the new delta is repetitive community speculation rather than a material operational change or credible causal finding. It can wait for a provider postmortem, alig
09-04 05:21sensor_dirtycomment_update
09-04 05:21sensor_dirtycomment_update
09-04 05:21sensor_dirtyengagement_update