GPT-4
The March 2023 landmark that made AI a boardroom subject.
You're looking at an AI model record: who built it, what it can do, and the hardware and data behind it.
GPT-4 jumped capability far past GPT-3.5 — bar exams, competition math, nuanced writing — and its technical report disclosed neither parameters nor architecture, marking the industry's turn to secrecy. Community and analyst estimates (never confirmed) describe a large mixture-of-experts trained on ~25,000 A100s at ~2×10²⁵ FLOP. It set the bar every 2023–24 model chased.
Specifications & key facts
Each figure is labeled by basis: vendor spec, vendor claim, reported, estimate, or official. "Not publicly disclosed" means exactly that — we never invent values.
Overview
How this connects to the rest of the stack
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Sources
Record reviewed as of 2026-01-15 — see Methodology.