A post title indexed from the publisher's own feed. It shows the post exists and when it went up; it is not a checked claim about the world. Treat it as a lead.

OpenAI · announcementHow we built ChatGPT’s novel ad stack for user trust and relevance

valid_from

2026-10-21

valid_to

null (still holds)

published

2026-10-21

confidence

0.50

superseded_by

null

recorded

2026-10-27 (first held by AsOf)

checked

2026-10-29 · the publisher's own feed

last rechecked

not yet rechecked against a source

Sources

• How we built ChatGPT’s novel ad stack for user trust and relevanceprimary · openai.com · 2026-10-21

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