RedditGPT-5.4 Leaked Extreme Reasoning 1M Context WindowThe Information·high signalThe Information reports GPT-5.4 with 1M context and extreme reasoning mode. Spotted on LMArena and in Codex commits.SourceSource pageThe Information↳ Follow the threadStack layer / Threat patternCross-model 'prompt laundering' and GuardFall shell-injection flaws hit major coding assistantsThreat-Modeling.comStack layer / Threat pattern'The MCP Governance Illusion' — Why Governing Tools Isn't EnoughCyera / Hacker NewsPolicy dependency / Stack layerIAPS warns on Kimi Claw: security and governance risks of Chinese-hosted 'always-on' AI agentsIAPSStack layer / Update threadSimon Willison Flags Tencent's Hy3 — a 295B Apache-2.0 Open MoE That Rivals GLM-5.2 and DeepSeek-V4, Free on OpenRouter Until July 21simonwillison.netStack layer / ContrastShow HN: Rowboat — Open-Source, Local-First Alternative to Claude Cowork With a Knowledge GraphHacker News / rowboatlabsStack layer / Follow-up threadCo-LMLM: continuous-query limited-memory language models externalize facts to a knowledge basearXivStack layer / Update threadLarge Cancer Assistant: model-agnostic orchestration framework for oncology decision supportarXivStack layer / Follow-up threadCompactionRL Trains Long-Horizon Agents to Compress Their Own ContextarXiv