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.
Google’s Nano Banana 2.1 improves image quality, text and editing consistency while cutting its image-output token price to a quarter of Nano Banana Pro’s rate.
Mistral launches a Large 4 API preview with a trillion-parameter architecture, discounted pricing and enterprise-focused benchmarks. Open weights are due later this month.
South Korea is investigating an Artex AI link to bank breaches affecting about 68,000 people, as security tools face scrutiny over possible misuse.
Dario Amodei received $18 million in 2025 compensation and Daniela Amodei $16.4 million, with stock and options driving most of their pay.
SemiAnalysis estimates Claude’s $200 plan offers 5.6x ChatGPT’s API-priced usage. We examine what that means for limits, model costs and completed work.
Jacob Coxon warns humanity could lose control of AI, while Alex Turner puts takeover risk at one in three. New York City weighs independent validation and shutdown safeguards.
Google has paused new OSS product-vulnerability reports after a surge in invalid automated submissions. Supply-chain reports remain open, with an update due in Q1 2027.
OpenAI will watermark eligible ChatGPT and Codex text in the EU, but restricted detector access and editing-related limitations complicate the promise of identifying AI writing.
OpenAI will test visual ads during ChatGPT image generation in the US this October, with Free and Go users eligible and new tools to measure purchases and sign-ups.
A Florida woman faces a written-threat charge after Anthropic’s safety system flagged Claude messages for human review and disclosure to police, investigators say.