How we contain Claude across products
Engineering at Anthropic How we contain Claude across products Twelve months ago, we'd have rejected out of hand the idea of granting Claude access sufficient to take down an internal Anthropic…
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A “diff” tool for AI: Finding behavioral differences in new models
…Your job is to vet this final product. To do this efficiently, you wouldn't re-read the entire encyclopedia. Instead, you’d use a change tracker to isolate only the new…
Anthropic Economic Index report: Learning curves
Economic Research Anthropic Economic Index report: Learning curves Mar 24, 2026 Read in PDF The Anthropic Economic Index uses our privacy-preserving data analysis system to track how Claude is being used…
Project Vend: Phase two
…It lost money over time, had a strange identity crisis where it claimed it was a human wearing a blue blazer, and was goaded by mischievous Anthropic employees into selling products (particularly…
Introducing Claude Opus 4.8
…Related content Anthropic raises $65B in Series H funding at $965B post-money valuation Anthropic opens Milan office to support Italian enterprise, research, and developers We're opening a new office in…
Anthropic Economic Index report: Economic primitives
…For tasks without observed AI speedup data, we assume no productivity change. We thank Pascual Restrepo for suggesting this particular exercise. Concluding Remarks This fourth Anthropic Economic Index Report introduces economic primitives…
An update on recent Claude Code quality reports
…As a result, we rolled out a change making medium the default effort, and explained the rationale via in-product dialog. Soon after rolling out, users began reporting that Claude Code felt…
Demystifying evals for AI agents
…Without them, it’s easy to get stuck in reactive loops—catching issues only in production, where fixing one failure creates others. Evals make problems and behavioral changes visible before they affect…
Long-running Claude for scientific computing
…Donating our open-source alignment tool Focus areas for The Anthropic Institute At The Anthropic Institute (TAI), we’ll be using the information we can access from within a frontier lab to…
Building Effective AI Agents
…Coding products that make complex changes to multiple files each time. Search tasks that involve gathering and analyzing information from multiple sources for possible relevant information. Workflow: Evaluator-optimizer In the evaluator…