GPT-4 / SFT / RHF / RLHF

Type: Concept

As of November 2026, GPT-4 / SFT / RHF / RLHF has been mentioned in one podcast episode on Lenny's Podcast (Dec 2025). Group label referencing model and post-training approaches (SFT, RHF/RLHF) used historically in fine-tuning and discussed as part of evolution toward RL environments.

Generative Pre-trained Transformer 4 (GPT-4) is a large language model developed by OpenAI and the fourth in its series of GPT foundation models.