Gradient descent is an optimization method that improves a model by repeatedly moving its parameters in a direction that reduces error. The gradient indicates how the loss would change if each parameter changed slightly, and the learning rate controls the size of the update. Full-batch gradient descent uses the entire dataset for each step, while stochastic and mini-batch variants estimate the direction from fewer examples. Updates that are too large may overshoot a useful solution, whereas tiny updates can make training slow or stall. Modern optimizers extend the basic idea with momentum, adaptive step sizes, and other techniques designed for complex neural networks and uneven optimization landscapes.
Climate tech startup Rainbow Weather has raised $5.5 million in seed funding to scale its AI-driven platform for hyper-local, real-time weather forecasting and environmental intelligence.
OpenAI now uses age prediction to adjust ChatGPT’s safety settings for teens. Users 18 and older can verify their age to disable extra restrictions.
OpenAI has invested in Merge Labs, a brain-computer interface startup founded by CEO Sam Altman, as part of a $250 million seed round valuing the company at $850 million.
Apple introduced Apple Creator Studio, a subscription bundle combining professional creative apps with new AI-driven features across video, music, imaging, and productivity tools. The offering expands Apple’s push into intelligent software workflows for creators.
Google released a major upgrade to its Gemini Deep Research agent, giving developers access to advanced autonomous research capabilities through the Interactions API. The company also introduced DeepSearchQA, a benchmark for evaluating multi-step web research agents.
Google introduced the Titans architecture and the MIRAS framework to enable AI models to handle massive contexts and update their internal memory while running, improving performance in long-sequence tasks.
OpenAI co-founder Ilya Sutskever says the era of scaling compute and data as the main driver of AI progress is ending, arguing that meaningful advances now depend on true scientific breakthroughs and solving AI’s poor generalization.
Voice AI startup Wispr has secured another $25M in funding as its Flow dictation app surges in enterprise adoption and user retention, bringing total capital raised to $81M.
Google has released Gemini 3, its most powerful AI model yet, offering advanced multimodal reasoning, coding capabilities, and agentic planning tools across multiple platforms.
Meta’s chief AI scientist Yann LeCun is reportedly preparing to leave the company to start his own AI venture focused on world models, signaling a major shift for Meta’s research division.