Claude Version History & Migration

Trace Claude version history. Learn the lineage (Claude 1, Claude 2 / 2.1, Claude 3 family, Claude 3.5, Claude 3.7, Claude 4.X), capability evolution per generation (context length, reasoning, tool use, agentic capability), the deprecation cycle, and the migration discipline that lets a production system move forward with the family without breaking.

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Lessons in This Topic

Work through these 6 lessons in order, or jump to whichever is most relevant.

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Claude Version History Overview

Advanced
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Generations 1 through 3

Advanced
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Claude 3.5 / 3.7 Era

Advanced
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Claude 4.X Family

Advanced
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Deprecation Cycle

Advanced
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Production Migration Discipline

Advanced