What is GPT-4?

GPT-4 is a large language model developed by OpenAI, succeeding GPT-3. It is referenced in discussions about cost efficiency, context length evolution, and as a benchmark for AI capabilities.

• Apr 2026 - Dylan Patel said Deep Seek’s cost on GPT-4 was 1/600 the cost.
• Apr 2026 - Reiner Pope noted that context lengths shot up from about 8K to 100-200K between GPT-3 and GPT-4.
• Apr 2026 - Joseph Nelson said computer vision today is roughly where language capabilities were 3 years ago with the introduction of ChatGPT and GPT-4.
• Mar 2026 - Nick Turley said they gave GPT-4 away for free and it ended up being revenue positive and retention positive.