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SIFT introduces a self-improving document classifier that uses a cheap SPLADE-LightGBM pipeline and an LLM judge to continuously teach itself, while a frozen-gate safety mechanism prevents silent regression, enabling autonomous retraining without human labeling overhead.
Anthropic releases its most powerful model, Claude Fable 5, which is of the mythical tier and introduces an automated safety review mechanism that redirects high-risk requests to Opus 4.8, balancing powerful capabilities with safety risks.