not much happened today

**OpenAI** rapidly expanded the **GPT-5.5** family with multiple variants including **gpt-image-2**, **GPT-5.5 Pro**, and **GPT-5.5 Cyber**, receiving positive feedback for efficiency and usability. **Codex** evolved into a long-running agent runtime with a new **/goal** mechanism, achieving 61% success on ARC-AGI-3 games after extensive testing. OpenAI also introduced cybersecurity-focused models like **GPT-5.5-Cyber** targeting enterprise and government sectors. Meanwhile, **Zyphra** released the open-model **ZAYA1-74B-Preview**, a 74B parameter mixture-of-experts model trained on **AMD** hardware under Apache 2.0 license, alongside a vision-language model **ZAYA1-VL-8B**. Inference infrastructure competition intensified with **vLLM** updates improving throughput and latency, including support for **DeepSeek V4** and enhanced quantization/backends.