From Ancient Claude to Modern Claude: Model Migration Guide
Claude 5 to Claude 5.5 -- Learn to Leave Old Claude Models Behind
TL;DR
- Newer Claude models like Opus 5.5 and Sonnet 5.5 offer improved performance and reduced costs.
- Users often face a dilemma when upgrading, as previous models are customized over weeks.
- Personalization in Claude is largely stored externally in Memory, Projects, and Skills, not within the model itself.
- Migrating to a new model requires transferring and cleaning these external components, not a complete retraining.
- The process involves preparing the new model with information from the old setup before making changes.