Today’s edition of my newsletter just went out.
🔗 https://www.rohan-paul.com/p/anthropic-brings-out-claude-sonnet
🗞️ Anthropic brings out Claude Sonnet 5 as a cheaper model for running agents.
🗞️ OPINION: Mapping the Foundation Model Landscape: July 2026
🗞️ Claude Sonnet 5 upgrades are not uniform across every skill. e.g. its weaker than Sonnet 4.6 on CyberGym
🗞️ Claude Sonnet 5 is more expensive (around +15%) per task than Opus 4.8 and much more expensive (2X) than Sonnet 4.6, even though its per-token price is lower than Opus.
🗞️ Claude Code allegedly fingerprints China-linked custom routes through tiny prompt formatting changes.
🗞️ “Are We Ready For An Agent-Native Memory System?”
🗞️ “Towards Automating Scientific Review with Google’s Paper Assistant Tool”