Knowledge baseSourcesOlivier de Segonzac (RESONEO)

Inside ChatGPT Search: how web.run and fan-out queries shape AI visibility

Author Olivier de Segonzac (RESONEO) Date 2026-05-14 Model state GPT-5.3 Instant (from 2026-03-04) and 5.4; French version Abondance 2026-04-08 Open source →

Key findings

Description of the web.run operations and the switch to JSON with GPT-5.3, plus the "Bigfoot effect" of falling domain diversity and the distinction between parametric and dynamic visibility.

Checked against our data

The article was accurate when published and, three months later, is outdated in the format details. It is the object lesson written into CLAUDE.md: an external finding needs its date, otherwise you read an old state as a contradiction.

ClaimStatusEvidence
web.run with twelve operations (search_query, open, find, click, screenshot, product_query, widgets)outdatedFor us line types business, fast, slow, search, product, image, open, length. click/find/screen only named via introspection.
Since 5.3 structured JSON objects instead of text commandsoutdatedSince 16-20 Aug 2026 pipe syntax again (Mohanadasan); for us only pipes.
browse_rewritten_queries for product requests, Google marker strlidoutdatedNot present; instead product|... lines with model names.
Cited domains per answer fell from 19.1 to 15.2unverifiable9-22 domains per searching question for us; no comparison value before 5.3.

Related

segonzac-2026-02-01 mohanadasan-2026-08-21