Opus 4.6 and ChatGPT 5.3-Codex Are Here and the Labs Are at War
The AI Daily Brief: Artificial Intelligence News and Analysis
Two Frontier Models Drop Back-to-Back
Nathaniel frames the unexpected near-simultaneous releases of Anthropic Opus 4.6 and OpenAI GPT 5.3 Codex.
Anthropic dropped Claude Opus 4.6 and OpenAI responded with GPT 5.3 Codex just 20 minutes later — the most intense head-to-head model release we've ever seen. Here's what each model brings, how they compare, and what the first reactions are telling us. In the headlines: Google and Amazon share their capex plans, and we're about to spend 2.5 moon landings on AI.
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