Summary

China's labs kept coming: Z.ai's GLM-5.3 claimed Mythos-5-level cyber chops and DeepSeek's V4-Pro landed to mixed reviews. OpenAI gave ChatGPT a memory of your Mac, the Journal flagged $121B in paper profits, and Claude agents started a turf war. Links China's Z.ai Touts New GLM-5.3 Model as Cyber Defense Tool (The Information) DeepSeek releases its flags…

Key takeaways

• DeepSeek's V4 Pro launched to mixed reviews—praised for ultra-low pricing (43.5¢/1M input tokens) but criticized for reasoning continuity issues and underperforming its own smaller V4 Flash model on some benchmarks.
• OpenAI's new 'Computer History' feature for macOS monitors app interactions and keystrokes (not screenshots) to build a local memory timeline, letting ChatGPT answer context-aware questions about past work across apps like Slack and Google Docs.
• S&P 500 trailing earnings are inflated by ~$121B in paper gains from equity markups at Alphabet and Amazon (primarily Anthropic and SpaceX stakes), distorting P/E valuations and exposing Wall Street's inconsistent treatment of non-recurring investment gains.

Why this matters

Chinese open-source AI models are aggressively undercutting US frontier model pricing while closing capability gaps in specialized domains like cybersecurity, forcing enterprise buyers to reassess vendor lock-in assumptions and cost structures.

Entities

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Show notes

China's labs kept coming: Z.ai's GLM-5.3 claimed Mythos-5-level cyber chops and DeepSeek's V4-Pro landed to mixed reviews. OpenAI gave ChatGPT a memory of your Mac, the Journal flagged $121B in paper profits, and Claude agents started a turf war. Links China's Z.ai Touts New GLM-5.3 Model as Cyber Defense Tool (The Information) DeepSeek releases its flagship V4-Pro model to mixed reviews, ranking second among open-source models behind Kimi K3, priced at just $0.435/1M input and $0.87/1M output t

Themes

• openai
• anthropic