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Anthropic

Is Claude Sonnet 4 out? Yes, since May 22, 2025

Yes. Claude Sonnet 4 was released on May 22, 2025.

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Have you used it? Claude Sonnet 4

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Lab
Anthropic
Family
Claude
Release date
Source
Anthropic · Introducing Claude 4

What changed

  • context 200k tokens · Context window of Claude Sonnet 4. Claude 3 Haiku is the previous model of the same tier, but the gap is beyond what a percentage explains.
  • price $3.00 / MTok · Prompt price of Claude Sonnet 4. Claude 3 Haiku is the previous model of the same tier, but the gap is beyond what a percentage explains.

About Claude Sonnet 4

Claude Sonnet 4 significantly enhances the capabilities of its predecessor, Sonnet 3.7, excelling in both coding and reasoning tasks with improved precision and controllability. Achieving state-of-the-art performance on SWE-bench (72.7%),...

Next Claude model to watch

Questions

When was Claude Sonnet 4 released?
Claude Sonnet 4 was released on May 22, 2025.
Who makes Claude Sonnet 4?
Claude Sonnet 4 is made by Anthropic.
What comes after Claude Sonnet 4?
Claude Opus 4, released on May 22, 2025.