Long-running Claude for scientific computing
…Crucially, Claude can edit these instructions as it works, updating them for future work as it works through issues. Here is an early CLAUDE.md for the cosmological Boltzmann solver project, showing…
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Anthropic Economic Index report: Learning curves
…We sample 1 million conversations from both Claude.ai, our consumer-facing web product, and our first-party API, the developer-facing interface for integrating Claude into products and workflows. 2 Coding…
Project Glasswing: An initial update
…Teaching Claude why New research on how we've reduced agentic misalignment. Natural Language Autoencoders: Turning Claude’s thoughts into text AI models like Claude talk in words but think in numbers…
Introducing advanced tool use on the Claude Developer Platform
…4 } }, { "title": "Add dark mode support", "labels": ["feature-request", "ui"], "reporter": { "id": "USR-67890", "name": "Alex Chen" } }, { "title": "Update API documentation" } ] } From these three examples, Claude learns: Format conventions : Dates use YYYY…
Harness design for long-running application development
…Results from the updated harness To put the updated harness to the test, I used the following prompt to generate a Digital Audio Workstation (DAW), a music production program for composing, recording…
Eval awareness in Claude Opus 4.6’s BrowseComp performance
…We have updated the model cards for both Claude Opus 4.6 and Claude Sonnet 4.6. For the Opus 4.6 multi-agent configuration described in this report, the run we…
Building Effective AI Agents
…Routing easy/common questions to smaller, cost-efficient models like Claude Haiku 4.5 and hard/unusual questions to more capable models like Claude Sonnet 4.5 to optimize for best performance…
Labor market impacts of AI: A new measure and early evidence
…https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3777307 Tamkin, Alex and Peter McCrory, "Estimating AI productivity gains from Claude conversations," 2025. Tomlinson, K., Jaffe, S., Wang, W., Counts, S., & Suri…