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.
Nvidia has discussed investing in Mercor, a data-labeling startup that supplies expert data for its Nemotron models, in a round that would double the company’s valuation to $20 billion.
Anthropic’s ongoing system-prompt changelog now documents instructions for Claude Fable 5 and Opus 5, revealing how the company steers agentic behavior in its newest models.
Cursor launched Origin, a code-hosting platform built into its editor with GitHub sync, in early beta the same day GitHub suffered a major global outage.
OpenAI paused reinforcement learning on its newest models after it could not rule out that an upcoming model, Astra, reached the top cybersecurity risk tier in its safety framework.
OpenAI launched ChatGPT for Teens, a version with default safety protections, learning tools and parental controls, automatically applied to users it identifies as under 18.
Trump-backed World Liberty Financial is working with WorldClaw, an AI platform offering restricted Chinese models, letting the family profit as its stablecoin is used for payment.
Anthropic’s annualized revenue run rate reached $65 billion at the end of July, a sevenfold jump in seven months, as the Claude maker prepares for a potential fall IPO.
AI video startup Higgsfield raised a $400 million Series B at a $5.4 billion valuation, more than quadrupling its worth in eight months as it pushes into enterprise marketing.
Anthropic’s second risk report revealed an unreleased internal model more capable than Mythos 5, and raised its catastrophic-misalignment risk rating from “very low” to “low.”
The US is preparing to warn dozens of countries they must choose between its Pax Silica AI coalition and China’s competing framework, or risk exclusion, according to a leaked draft.