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Claude Sonnet

AnthropicUnited StatesProprietaryProprietaryproprietarytext · vision

Workhorse tier — strong intelligence at lower latency/cost than Opus. The default for most production use.

Release history (8)

  1. Sonnet 4.6 (Feb 2026)
    Current stablestableFeb 17, 2026
    claude-sonnet-4-6-20260217

    Current stable Sonnet (date corrected from seed).

  2. Sonnet 4.6
    stableJan 15, 2026
    claude-sonnet-4-6

    Current stable Sonnet.

  3. Sonnet 4.5
    stableSep 29, 2025
    claude-sonnet-4-5

    Strong coding/agent Sonnet.

  4. Sonnet 4
    deprecatedMay 22, 2025
    claude-sonnet-4-20250514

    First Claude 4 Sonnet.

  5. Sonnet 3.7
    deprecatedFeb 24, 2025
    claude-3-7-sonnet-20250219

    First Claude with extended thinking.

  6. Sonnet 3.5 v2
    deprecatedOct 22, 2024
    claude-3-5-sonnet-20241022

    Sonnet 3.5 refresh with computer use.

  7. Sonnet 3.5
    deprecatedJun 20, 2024
    claude-3-5-sonnet-20240620

    First Sonnet 3.5; major coding/agent jump.

  8. Sonnet 3
    deprecatedMar 4, 2024
    claude-3-sonnet-20240229

    Original Sonnet.

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