Anthropic Claude

Service

Anthropic Claude claude-mythos-5-1 is the newest actively maintained release. 13 of 32 tracked cycles remain supported. The next cycle scheduled to reach end-of-life is claude-sonnet-4-5-20250929, on September 29, 2026.

Latest version

claude-mythos-5-1

—

Actively maintained cycles

of 32 tracked

Total cycles tracked

since Mar 14, 2023

Support pattern

How Anthropic Claude has behaved across the cycles tracked here, rather than what its policy documents state. Useful for judging how much runway a version is likely to have before you commit to it.

Typical support window

13 months

median of 30 completed cycles

New cycle roughly every

1 months

median gap between releases

Compared with service

−32 mo

shorter than the service median

Next end of life

20 days

Anthropic Claude claude-sonnet-4-5-20250929

Support windows are getting shorter: the most recent cycles run about 8 months less than the earlier ones.

Computed from release and end-of-life dates tracked for Anthropic Claude. Medians are used rather than averages so one unusually short or long release does not skew the figure. Cycles with no recorded end-of-life date are excluded from the support window.

Release lifecycle

Actively maintainedSecurity support onlyEnd of life

Today

claude-mythos-5-1Latest

claude-mythos-5-1 · —

claude-fable-5-1

claude-fable-5-1 · —

claude-opus-5

claude-opus-5 · —

claude-sonnet-5

claude-sonnet-5 · —

claude-mythos-5

claude-mythos-5 · —

claude-fable-5

claude-fable-5 · —

claude-opus-4-8

claude-opus-4-8 · —

claude-opus-4-7

claude-opus-4-7 · —

claude-sonnet-4-6

claude-sonnet-4-6 · —

claude-opus-4-6

claude-opus-4-6 · —

claude-opus-4-5-20251101

claude-opus-4-5-20251101 · —

claude-haiku-4-5-20251001

claude-haiku-4-5-20251001 · —

claude-sonnet-4-5-20250929

claude-sonnet-4-5-20250929 · —

claude-opus-4-1-20250805

EOL Aug 5, 2026

claude-sonnet-4-20250514

EOL Jun 15, 2026

claude-opus-4-20250514

EOL Jun 15, 2026

claude-3-7-sonnet-20250219

EOL Feb 19, 2026

claude-3-5-haiku-20241022

EOL Feb 19, 2026

claude-3-5-sonnet-20241022

EOL Oct 28, 2025

claude-3-5-sonnet-20240620

EOL Oct 28, 2025

claude-3-haiku-20240307

EOL Apr 20, 2026

claude-3-opus-20240229

EOL Jan 5, 2026

claude-3-sonnet-20240229

EOL Jul 21, 2025

claude-2.1

EOL Jul 21, 2025

claude-instant-1.2

EOL Nov 6, 2024

claude-2.0

EOL Jul 21, 2025

claude-1.3

EOL Nov 6, 2024

claude-instant-1.1

EOL Nov 6, 2024

claude-1.2

EOL Nov 6, 2024

claude-1.1

EOL Nov 6, 2024

claude-instant-1.0

EOL Nov 6, 2024

claude-1.0

EOL Nov 6, 2024

2023202420252026

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