Sequence-to-sequence, or Seq2Seq, describes models that map an input sequence to an output sequence whose length may differ. Machine translation converts words in one language into another, speech recognition maps audio frames to text, and summarization produces a shorter sequence from a longer document. Many Seq2Seq systems use an encoder to represent the input and a decoder to generate output step by step, often with attention between them. Transformer encoder–decoder architectures largely replaced earlier recurrent designs. Training typically uses paired examples and token-level loss, while inference relies on greedy, beam, or sampling-based decoding. Quality depends on alignment, context limits, data coverage, and evaluation beyond surface overlap.
OpenAI says its unreleased Astra model can autonomously find and exploit unknown security flaws, the first system it has rated at its highest cyber-risk tier.
Anthropic has released Claude Fable 5.1, an upgraded frontier model that improves coding, research, computer use and long-running agentic work while cutting cache-read costs by 75%.
Open-source AI agent OpenClaw released its largest update yet, simplifying installation and adding shared cloud sessions that let multiple people collaborate on one agent.
OpenAI says ChatGPT Ads reached a $1 billion annualized revenue run rate in under 200 days, expanding self-serve ad buying to India, Europe and the Middle East.
Anthropic agreed to a $35 billion, six-year computing deal with Nvidia-backed Lambda, its latest megadeal in a compute-buying spree that has topped $150 billion this year.
A federal judge ruled the Pentagon’s designation of Anthropic as a supply chain risk was illegal retaliation for the company’s public stance on military AI use.
Nvidia has reportedly agreed to acquire open-source AI platform Hugging Face for $12.9 billion, though no signed deal is confirmed and talks could still fall apart.
Anthropic opened a research preview of the Model Hardware Standard, letting AI agents operate lab and factory equipment like microscopes and robotic arms in its first physical-world product.
Nvidia is building hardware optimizations for Chinese AI models like DeepSeek and Qwen, even as it warns regulators that US restrictions on such models could hurt its business.
Google launched Gemini 3.5 Transcribe, a speech-to-text model supporting 85+ languages that cleans up filler words and self-corrections, ranking fifth on an independent accuracy leaderboard.