not much happened today

**OpenAI's GPT-5.5** achieves top-tier performance in long-horizon cyber tasks, matching or surpassing **Claude Mythos Preview** with a **71.4%** pass rate and showing ongoing improvement beyond **100M tokens** inference. OpenAI also released an **Advanced Account Security** update for ChatGPT enhancing phishing resistance. The **Codex** update expands beyond coding to general computer tasks, improving speed by up to **42%** and introducing role-based onboarding and app integrations. Economically, **GPT-5.5 Pro** shows a slight SOTA improvement on **CritPt** with **~60% lower cost** and token use compared to GPT-5.4 Pro. In open-weight models, **Qwen3.6 27B** leads under 150B parameters with an **Intelligence Index score of 46**, featuring **262K context**, native multimodal input, and efficient BF16 weights. Tencent's **Hy3-preview** (295B total, 21B active MoE) scores 42 on the Intelligence Index with strong scientific reasoning on **CritPt**. xAI's **Grok 4.3** shows sharp improvements on agentic benchmarks with reduced cost.