OpenAI has released more than 30 new models, features, and tools through its API in the past six months. That’s roughly one meaningful update every six days.
The GPT-5 family keeps growing
The latest additions, GPT-5.5 and GPT-5.5 Pro, launched on April 23, 2026. OpenAI positioned them as the top choices for complex tasks like coding and research. API pricing landed at $5 per million input tokens and $30 per million output tokens.
Before that, March 2026 saw the arrival of multiple GPT-5.4 variants, including mini and nano versions. These were built for high-volume workloads where cost and speed matter more than raw reasoning power.
Audio model snapshots released in December 2025 showed meaningful improvements in multilingual capabilities and hallucination reduction.
