All memos tagged #openai-model-lexicon

Whisper by OpenAI is a transformer-based automatic speech recognition (ASR) system designed to perform transcription, translation, and voice recognition across more than 50 languages. Trained on over...

GPT-5.5 is OpenAI's most capable model as of April 2026, released on April 23, 2026. OpenAI President Greg Brockman described it as "a new class of intelligence" — specifically designed for complex,...

GPT-5 is OpenAI's fifth-generation GPT model, released August 7, 2025, which unified fast responses and deeper reasoning behind a single router in ChatGPT. GPT-5 replaced the GPT-4-series and the...

The OpenAI Model Glossary is a collection of every major model from OpenAI, from GPT-1 in 2018 to the GPT-6 family in September 2026, grouped by family and listed newest first. Most are generations...

GPT (Generative Pre-trained Transformer) is OpenAI's family of Large Language Model (LLM) systems, from GPT-1 in 2018 to the GPT-6 family in September 2026, and the technology behind ChatGPT. Each...

Sora is OpenAI's discontinued text-to-video model and app, previewed in February 2024, which OpenAI shut down in 2026 after its standalone app failed to hold an audience. OpenAI previewed Sora on...

GPT-3 is OpenAI's third-generation GPT language model, released through a private API beta on June 11, 2020, and the first GPT model OpenAI commercialized broadly. With 175 billion parameters, GPT-3...

The GPT-4-series is OpenAI's fourth generation of GPT models, spanning GPT-4 (March 2023) through GPT-4o, GPT-4.5, and GPT-4.1 (2025), which powered ChatGPT until the arrival of GPT-5. The series...