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Epoch AI says GPT-5.4 Pro elicited a publishable solution to one 2019 conjecture in its FrontierMath Open Problems set, with a formal writeup planned. Treat it as an early milestone worth reproducing, not blanket evidence that frontier models can already automate math research.
ChatGPT now saves uploaded and generated files into an account-level Library that can be reused across conversations from the web sidebar or recent-files picker. It removes repetitive re-uploading and makes past PDFs, spreadsheets, and images part of a persistent working context.
Skyler Miao said MiniMax M2.7 open weights are due in roughly two weeks, with updates tuned for agent tasks. Separate replies also confirm multimodal M3, so local-stack builders should watch both the drop and the benchmark setup.
KittenTTS released nano, micro, and mini ONNX TTS models sized for CPU-first deployment instead of GPU-heavy stacks. Voice-agent builders should benchmark both dependency weight and real-time latency before treating tiny size as enough.
Cursor and Kimi said Composer 2 starts from Kimi K2.5, with continued pretraining and RL added on top after developers spotted Kimi model IDs in traffic. Teams should benchmark it as a productized open-base stack, not a from-scratch model.
Mistral Small 4 combines reasoning and non-reasoning modes in one 119B MoE, adds native image input, and expands context to 256K at $0.15/$0.6 per million tokens. It improves sharply over Small 3.2, but still trails similarly sized open peers on several evals.
NVIDIA published Nemotron-Cascade 2, a 30B MoE with 3B active parameters, claiming IMO gold-level math and Kimi K2.5-class code scores, then pushed it to Hugging Face and Ollama. It is worth testing if you want an open agent model with immediate local and hosted paths.
