Last month in AI - September 2025
Briefly

Last month in AI - September 2025
"Welcome to the latest edition of Last month in AI! September turned into AI's funding frenzy month: record-breaking raises hit the double-digit billions, frontier labs shipped trillion-parameter models, and, because this is 2025, companies started measuring data centers in gigawatts instead of GPUs.Also, NVIDIA invented a GPU co-processor, and xAI accused OpenAI of stealing trade secrets in court. Let's jump into the biggest stories and breakthroughs that shaped September."
"Alibaba dropped Qwen3-Max, a trillion-parameter model that immediately landed among the top coding models globally. Competitive with GPT-5 and Claude 4 on benchmarks, while keeping API pricing transparent and accessible. The Qwen team continues to prove that open weights don't mean second-tier; this thing can actually code. Qwen3-Omni Alongside Max, Alibaba shipped Qwen3-Omni, a real-time multimodal model that handles text, vision, and audio, achieving competitive benchmarks across the board."
"Anthropic rolled out Sonnet 4.5, the next generation of coding models, which are clearly trained for long-running, agentic tasks. It maintains long-term context, takes notes mid-task, and self-validates its outputs for correctness. Like GPT-5, it supports parallel tool calls to speed up workflows (and chew through GPU budgets). This is the model you'd trust to code for 30 hours straight without supervision."
September saw a surge in AI investment with record double-digit billion-dollar raises and major model releases. Frontier and open-source labs shipped trillion-parameter and real-time multimodal models that perform strongly on coding and multimodal benchmarks. Alibaba released Qwen3-Max and Qwen3-Omni with transparent API pricing; z.ai unveiled GLM-4.6 as a smaller but competitive coding model. Anthropic's Claude Sonnet 4.5 targets long-running agentic coding with long context and self-validation. NVIDIA introduced a GPU co-processor design and industry discussions shifted to gigawatt-scale data centers. Legal tensions emerged as xAI accused OpenAI of stealing trade secrets.
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