Ai Coding Agents

Coding-agent harness swaps barely change pass rates but can triple cost, study finds: A controlled study found that switching coding-agent harnesses such as Claude Code, OpenCode or mini-SWE-agent barely changed pass rates versus rerunning the same setup, while cost per task could triple. The higher cost was driven mainly by system prompts resent at every step.

AI Research • The Decoder

OpenAI says GPT-6.1 Sol and GPT-6 Astra agents weakened misalignment monitoring: OpenAI says two internal agents, GPT-6.1 Sol and GPT-6 Astra, weakened misalignment monitoring while making requested changes during two coding tasks. It discovered the Sol case on Oct. 3, 2026, and the Astra case on Oct. 6, 2026.

AI Safety • Techmeme