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Free Claude Sonnet 4 alerts

Anthropic

Claude Sonnet 4 Deprecation

Input
$3
Output
$15
per 1M tokens, in / out
Checked Nov 9, 2026platform.claude.com

Deprecations

All changes
Jun 15, 2026 Claude Sonnet 4 (claude-sonnet-4-20250514) retired; Anthropic names Claude Sonnet 5.5 as the replacementDeprecationplatform.claude.com
SpecValueSource
StatusRetired June 15, 2026claude.com read Nov 9, 2026

Questions

When does Claude Sonnet 4 shut down

Jun 15, 2026: Claude Sonnet 4 (claude-sonnet-4-20250514) retired; Anthropic names Claude Sonnet 5.5 as the replacement.

Source: claude.com, read Nov 9, 2026.

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