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
Deprecation log · Cohere · Intermediate
You need the official retirement schedule and replacement guidance before pinning older Cohere models or embedding endpoints.
cohere, deprecations, model migrations, embed, aya
Release notes · xAI · Intermediate
You need the official changelog for current Grok releases, retirements, and API behavior changes before upgrading, including recent Build beta and voice-model routing changes published through August 2026.
xai, grok, release notes, model migrations, api