AI Model & Product Launch Alerts

GPT-5.5 is out — and it closes the gap on reasoning while cutting token costs in half

OpenAI shipped GPT-5.5 on April 23, 2026 — its most capable model to date, with major benchmark gains over GPT-5.4 and per-token costs roughly half those of comparable frontier models. This article covers what changed, how it stacks up against Claude Opus 4.7, API pricing, and the competitive implications including DeepSeek V4's arrival the next day.