OpenAI launches new agentic coding model only minutes after Anthropic drops its own

The new model is build to accelerate the capabilities of Codex, the agentic coding tool OpenAI launched earlier this week.
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Anthropic’s Claude Opus 4.6 Comes to Microsoft Foundry, GitHub Copilot

Anthropic’s Claude Opus 4.6 arrives in Microsoft Foundry and GitHub Copilot, bringing advanced reasoning, agentic coding, and ...

I used Xcode 26.3 to build an iOS app with my voice in just two days - and it was exhilarating

Want to see what agentic coding really feels like? Come along on my wild, wonderful, and terrifying two-day vibe coding adventure with Xcode 26.3.

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 ...

Claude Opus 4.6 vs GPT-5.3-Codex: Which Agentic Coding Model Offers the Best Value

Anthropic's Claude Opus 4.6 and OpenAI's GPT-5.3-Codex go head-to-head in agentic coding, but are there any differences?