OpenAI releases GPT-5.3-Codex, a coding model that helped build itself

Anthropic, one of OpenAI's chief rivals, also released a new coding model today, Claude Opus 4.6. Earlier this week, OpenAI ...
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Autonomous coding: A team of 16 Claude AI agents build a C compiler in Rust from scratch

Anthropic researcher Nicholas Carlini successfully used teams of Claude Opus 4.6 AI agents to build a massive C compiler in ...

OpenAI says new coding model helped build itself

The new coding model released Thursday afternoon, entitled GPT-5.3-Codex, builds on OpenAI’s GPT-5.2-Codex model and combines insights from the AI company’s GPT-5.2 model, which excels on non-coding ...
PCMag

ChatGPT 5.3 Codex Model Helped to Build Itself

The new coding model is the first time the brand has found its own models can be instrumental in its own development.