The Stack Index / Reasoning / ChatGPT
Reasoning · serves AI Layer
ChatGPT
ChatGPT is used in the reasoning layer by 4 operators documented on GTM Vault, including Jason Patel, Open Forge AI, where it ran as the generative engine optimised for.
Who named it, and what it did
One entry per episode. Mentions in passing, sponsor reads and guest biographies are not counted.
- GTM 34operator evidenceJason Patel, Open Forge AI
Generative engine optimised for
- GTM 46operator evidenceAlex Bilmes, Endgame
Model in use across departments
- GTM 47operator evidenceMark van Oppen, SecureAuth
Model in active enterprise use
- GTM 50operator evidenceRick Koleta
Model
See which stacks this tool shows up in next
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Runs alongside
Tools that appear in the same operators’ stacks as ChatGPT. The count is how many of those operators run both.