GPT-4

GPT-4 appears in Founder Mode: Jake Heller, Founder & CEO, Casetext as the model capability jump that changed Jake Heller’s view of legal AI. The source says OpenAI gave Heller and a co-founder early NDA-bound access in mid-2022 to an unreleased model that later became an early version of GPT-4.

For the wiki, this page is grounded narrowly in the Casetext source rather than a general model history. Heller contrasts earlier GPT-3 and GPT-3.5 behavior, which could produce legal-sounding nonsense, with the GPT-4-era model’s much stronger performance on legal tasks and bar-exam-style evaluation. That contrast made Casetext willing to redirect the company toward [[CoCounsel|Co-Counsel]] and becomes a concrete Frontier Model Inflection Pivot case.

Connections

• OpenAI - model provider in the source.
• Jake Heller, Casetext, and [[CoCounsel|Co-Counsel]] - early-access legal workflow case.
• ChatGPT - public market-timing context before GPT-4’s March 2023 release.
• Language Model Scaling Bet, Frontier Model Release Governance, Legal AI Hallucination, and Vertical Workflow AI - model capability, release, risk, and workflow concepts.