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OpenAI · Anthropic · xAI

The Daily Model

OpenAI

Oct 27

At OpenAI, Codex Got Fast Enough to Wait For

OpenAI's own engineers say Codex's Ultrafast mode cut incident investigations from hours to minutes and kept their attention in one place; the figures are self-reported, and among…

Oct 26

The Pull Request That Touches Everything

CodeRabbit pairs GPT-6.1 Sol with human reviewers to trace security risk across files, dependencies and linked repos—then drafts fixes for a person to approve.

Oct 26

The Button That Wasn't There

Greptile pairs GPT-6 Astra's computer use with code review to test running applications, not just read diffs — a concrete step toward AI QA that catches bugs invisible in source.