Anthropic · SELECTED HISTORY
Claude model history: Sonnet releases, 2024 to 2025
These two Sonnet snapshots show a shift from a workspace for generated content toward explicit thinking controls and a coding tool that can act on files.
Coverage
Two selected Sonnet releases from June 2024 and February 2025. This is not a complete Claude release list.
Claude 3.5 Sonnet
A stronger everyday coding assistant
Original sourceClaude 3.7 Sonnet
Reasoning and coding in one model
Original source
How to read a release timeline
A paper, preview and public rollout can have different dates. These entries preserve that distinction. Release dates show when something was announced or made available, not how far ahead one company is overall.