Dan tested Codex 5.3 on Proof, a macOS markdown editor that he's been vibe coding that tracks the origin of every piece of text—whether it was written by a human or generated by AI—and lets users ...

OpenAI's new GPT-5.3-Codex is 25% faster and goes way beyond coding now - what's new ...

Anthropic, one of OpenAI's chief rivals, also released a new coding model today, Claude Opus 4.6. Earlier this week, OpenAI ...

With a 1 million token context window and industry-leading benchmark results, the release intensifies competition with OpenAI ...

Below is a detailed look at the key Anthropic AI tools launched over the past 12 months and what each brings to users in 2026.

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