Model migration explainer · Anthropic · Intermediate to advanced
Anthropic released Claude Sonnet 5.5 on September 28, 2026. Use this guide to understand the efficiency claims, breaking API changes, and a safe migration test from Sonnet 5.
claude sonnet 5.5, claude code, coding agents, model migration, adaptive thinking
Release notes · Anthropic · Intermediate
You need the current Anthropic changelog for model launches, API changes, and Claude Code updates before teaching or adopting a workflow.
anthropic, release notes, claude, claude code, model updates
Release notes · Anthropic · Intermediate
You need Anthropic's primary-source release stream for current model launches, retirements, and platform changes, including the June 5, 2026 Claude Opus 4.1 deprecation notice and its August 5, 2026 retirement.
anthropic, claude, release notes, model deprecations, managed agents
Release notes · Mistral AI · Intermediate
You want the official launch and retirement timeline for newer Mistral models and APIs before relying on screenshots or outdated benchmark threads.
mistral, release notes, voxtral, devstral, model updates