◉CLAUDE LABJP
●2.1.301 — Adds the vim % motion, LaTeX math rendering in the VS Code panel, and a retry-watchdog limit for usage-limit waits (10/15)●2.1.299 — Conversations over 200K tokens left idle about 54 minutes get compacted; MCP allow rules now match only the server they name●SONNET 4.5 — Retires on the Claude API on 11/30, 45 days left. Migrate to Sonnet 5.5●WINDOWS — Reports say hooks break silently only on Japanese-locale Windows; check the character encoding first●FAST MODE — Opus 5.5 fast mode is out of research preview and no longer needs the beta header (10/15)●NEW — I Put a Ten-Line Promise File at the To…●2.1.301 — Adds the vim % motion, LaTeX math rendering in the VS Code panel, and a retry-watchdog limit for usage-limit waits (10/15)●2.1.299 — Conversations over 200K tokens left idle about 54 minutes get compacted; MCP allow rules now match only the server they name●SONNET 4.5 — Retires on the Claude API on 11/30, 45 days left. Migrate to Sonnet 5.5●WINDOWS — Reports say hooks break silently only on Japanese-locale Windows; check the character encoding first●FAST MODE — Opus 5.5 fast mode is out of research preview and no longer needs the beta header (10/15)●NEW — I Put a Ten-Line Promise File at the To…
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⬡ API & SDK/2026-05-06Advanced

Maximizing Profit Margins with Claude Haiku / Sonnet / Opus Model Switching

A complete implementation guide for dynamically routing Claude API requests to the right model based on task complexity. Includes cost calculation formulas, routing engine code, quality fallback logic, and real-world margin impact data.

⬡ API & SDK/2026-04-07Beginner

Claude Sonnet 4.5 1M Context Deprecation Guide — What to Do Before April 30

Claude Sonnet 4.5's 1M token context beta ends April 30, 2026. Migrate to Sonnet 4.6 with step-by-step code examples — no beta header required on the new model.

⟐ Claude Code/2026-03-30Intermediate

Claude Code Model Selection Strategy — Maximize Development Efficiency with /model and opusplan Mode

Learn how to strategically switch between Opus, Sonnet, and Haiku in Claude Code using the /model command. Discover opusplan mode, task-based model selection, and cost optimization techniques.