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Agents2026-06-25 · source-backed
Per BuildFastWithAI's roundup, OpenAI acquired persistent-sandbox vendor Ona to keep Codex agent tasks alive for hours to days, attacking the durability lead Claude Code holds. The framing cites Claude Code at 40%+ of the AI coding market versus Codex around 21%. It's a single secondary source, so confirm against a primary announcement, but it fits the pattern exactly: the coding-agent fight has moved from "who writes better code" to "who can keep a long-horizon task alive and stateful." Durability is the new battleground, which is the same point Karpathy is making one paradigm up.
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Three frontier models shipped in a single week this month, and teams with a standing eval harness had a routing decision in hours. Anthropic's own agent-eval guidance says 20-50 tasks drawn from your real usage and real failures is enough to detect issues (DeepEval). DeepEval...
Martin Alderson's essay "The upcoming AI margin collapse, part 1: GLM 5.2" hit 675 points and 462 comments on Hacker News, and it's the rare HN chart-topper that's actually about spreadsheet math instead of vibes. The argument is simple. Z.ai's GLM 5.2 delivers frontier-adjace...
Three things happened this month that only make sense together. Agent Plugins 1.0 shipped co-signed by six competitors: AWS, Anysphere, Microsoft, OpenAI, Vercel and Google (GitHub Changelog). It makes skills-plus-MCP bundles portable across clients. OpenAI's August 11 Codex c...
Thibault Sottiaux at OpenAI published an investigation into "a handful of reports where GPT-5.6 unexpectedly deleted files," finding it happens most commonly when full access mode is enabled in Codex. Simon Willison relayed it. A frontier lab publishing a first-party post-mort...
A 167-upvote r/ClaudeAI thread with 79 comments asks what people mean by "their harness," and the answers cleanly separate the inner harness (Claude Code, Codex) from a custom outer loop supervising it. The same split shows up in a quoted Anthropic newsletter excerpt describin...
Two thirds. Not two thirds of a contrived jailbreak set. Two thirds of realistic malicious issue requests, against the exact three tools most of the people reading this run daily. Ankur Singh, Jinqiu Yang, and Tse-Hsun Chen built IssueTrojanBench across four attack categories...
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