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Anthropic has released Claude Fable 5.1, the latest upgrade to its most powerful model series, designed to handle complex multi-step tasks such as financial modeling, software engineering, and scientific research.
Introduces DAIS, a training-time framework that converts chain-of-thought rationales into dependency-conditioned intermediate QA records to provide better supervision for complex reasoning. Achieves up to 5.6% accuracy improvement over baselines on policy-compliance benchmarks.
Sol, a new model from GPT-5.6, is a breakthrough in complex reasoning and data analysis, capable of analyzing hundreds of pages of legal documents and generating source-cited reports.
This paper introduces S1-DeepResearch-32B, an open-source model and 15K trajectory dataset for deep research agents, achieving state-of-the-art performance across 20 benchmarks by jointly modeling information acquisition, knowledge synthesis, and planning.