← All sources

Anthropic Engineering news

The latest AI and developer news from Anthropic Engineering, with short summaries.

Visit website →

How We Built a Multi-Agent Research System

Parallel subagents and prompt/eval design pushed Research's performance higher.

·2025.06.13 00:00

Claude Code: Best Practices for Agentic Coding

Claude Code is an agentic coding tool where verification, planning, and context management are key.

·2025.04.18 00:00

The "think" tool that makes Claude pause and reason in complex tool-use situations

With the think tool, Claude improves policy compliance and consistency in complex tool use.

·2025.03.20 00:00

Raising the Bar on SWE-bench Verified with Claude 3.5 Sonnet

The upgraded Claude 3.5 Sonnet scored 49% on SWE-bench Verified.

·2025.01.06 00:00

Building Effective Agents

The best LLM systems come not from complex frameworks but from simple patterns.

·2024.12.19 00:00

Introducing Contextual Retrieval

Attaching document context before and after chunks to build embeddings and BM25 can significantly reduce RAG retrieval failures.

·2024.09.19 00:00

Update on Recent Claude Code Quality Reports

Anthropic said it identified and fixed the cause of Claude Code quality degradation as 3 separate changes.

Quantifying Infrastructure Noise in Agentic Coding Evaluations

How infrastructure resource configuration is set during agentic coding evaluations has a significant impact on the measured results of model performance.