Glossary Definition

Pre-training

Term Definition

The initial unsupervised training phase where a neural network ingests massive text corpuses to master syntax, structure, and baseline world knowledge.

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Featured In Blog Posts

Sep 12, 2026

GPT-6 Astra Explained: Features, Capabilities, Benchmarks, Pricing

On September 3, 2026, OpenAI released GPT-6 Astra — the first model it rates "Critical" for cybersecurity capability under its own safety framework, and a model it markets as its most capable, most aligned release to date. Here's what's officially confirmed, what independent evaluators found, and how it actually compares to Claude and Gemini.