Laycock describes an internal experiment run by Giles Alexander, Thoughtworks' Regional CTO for Europe. Senior engineers, infrastructure consultants and product people spent a week building an airline application with no code written by…
In the News: October 29, 2026 (Extra 3)
Thoughtworks ran a week of fully agent-built software; the app ran but the build stayed red, and the open question is whether CI can absorb parallel agents.
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Thoughtworks: a week of agent-only development shipped a running app and a build that was often red
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YC Labs ran Codex and Claude Code swarms against each other; one side loaded 55 of its 74 anti-air turrets with the wrong ammunition
In Mindustry, a factory-building strategy game, GPT-6.1 Sol agents in Codex beat Claude Opus 5.5 agents in Claude Code 6-1 across seven games over about 9.5 hours. In Bed Wars, 10 agents per side, the GPT team won 6-3 in nine games.
Mistral Large 4 (Le Chonk) is now open weight
Mistral says it is releasing the weights of its 1-trillion-parameter model. It reports 41% on Terminal-Bench 4.0 (up 13 points from the preview), 19.7% on Cognition's private FrontierCode 2.0, and a 48% score on the Artificial Analysis Coding Agent Index, effectively tied with GLM-5.3 at 47% fewer tokens per task. These are Mistral's figures and we have not run them; we did not check the license terms.