A developer found that running their evaluation suite through Anthropic's Claude Code CLI costs $0 per run, while the same 27 calls via the API would bill $9.14. The CLI prints a total_cost_usd receip…
A GitHub issue filed against Anthropic's Claude Code reports that the AI assistant adds verbose, redundant code comments by default across all languages and models, and that this behavior persists eve…
Loop engineering's two core pieces — run-until-done and maker/checker — are simple to wire up but easy to get quietly wrong, Anthropic's Boris Cherny said. Building a real-feedback loop from scratch i…
Anthropic documented that when a request to its 'claude-fable-5' model is classified as sensitive, the API silently substitutes 'claude-opus-4-8' instead, notifying the user in the response object. Cu…
Users are experiencing delays and stability issues with Claude's command classifier since this morning. The classifier is briefly unavailable, and the claude-opus-4-8 model is temporarily unavailable …
A developer built a multi-agent AI system where one agent writes code, a second scores it, and a third refines it in an automated loop. The pipeline uses Claude models to generate, evaluate, and impro…
A developer guide outlines 11 stages to build a self-running Claude assistant, progressing from a basic chat prompt to a cron-scheduled system that classifies emails, calls tools, and runs autonomousl…
Anthropic retired two Claude 4 models today, June 15, 2026, cutting off API access to claude-sonnet-4-20250514 and claude-opus-4-20250514. The company recommends migrating to claude-sonnet-4-6 and cla…