not much happened today

**OpenAI** achieved a major math breakthrough by disproving a long-standing Erdős unit distance problem using a **general-purpose reasoning model**, marking a milestone in AI-driven formal science and long-horizon reasoning. The result was validated by prominent mathematicians like **Timothy Gowers** and OpenAI researcher **Hongxun Wu**, highlighting the model's advanced reasoning capabilities beyond prior AI math achievements. Meanwhile, **Cohere** released **Command A+** as an open-source Apache 2.0 licensed model, featuring a **218B MoE / 25B active** multimodal architecture supporting **48 languages** and optimized for low hardware requirements, runnable on as little as **2× H100 GPUs**. Benchmarks place Command A+ near **Claude 4.5 Haiku** in intelligence with strong non-hallucination but weaker scientific reasoning and coding. The architecture includes novel elements like a **parallel transformer block**, **shared experts**, and **LayerNorm over RMSNorm**.