December 2025

Theo explains Anthropic’s acquisition of Bun, why it aligns with Claude Code’s strategy, and why Bun will remain open-source while accelerating JS tooling for AI-driven development.

Roundup and benchmarks of December 2025 AI coding agents comparing Opus 4.5, Gemini 3.0 Pro, and GPT‑5.1 across popular harnesses, highlighting Opus’s consistency, Gemini’s harness sensitivity, and GPT‑5.1’s variability.