Claude 3 Sonnet
claude-3-sonnet-20240229
2024-03-04 — 2025-07-21 · lived 1 year, 4 months
The middle Claude 3, and the one that was free on claude.ai — so through 2024, to everyone who had never held an API key, Claude meant this. Its model ID ends in 20240229, a leap day it shares with Opus and that neither of them was released on.
- Provider
- Anthropic
- Cause of death
- Superseded
- Notice given
- 2025-01-21
- Context
- 200,000 tokens
- Cost per Mtok
- $3.00 in · $15.00 out
- Succeeded by
- Claude 3.5 Sonnet
“Succeeded by” is this site’s reading of model lineage, not the provider’s official migration guidance.