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Olivier Reuland

Claude Opus 4.6 and GPT-5.3-Codex: new models drop

Claude Opus 4.6 and GPT-5.3-Codex both claim to be better than all previous models. OpenAI says GPT-5.3-Codex is the first High capability model for cybersecurity.

Claude Opus 4.6 and GPT-5.3-Codex got released. They both claim to be better than all previous models, but obviously couldn't be compared to each other (yet).

OpenAI says GPT-5.3-Codex is the first model to classify as High capability for cybersecurity-related tasks under their Preparedness Framework. It's also meant to be 25% faster than its predecessor.

On the other hand, Anthropic claims they made substantial upgrades to Claude in Excel, and they're releasing Claude in PowerPoint in a research preview. The new model also features a 1M token context window in beta.

Who else is going to put these under the ringer today doing some tests? 😅

Olivier Reuland
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