Question 1

What is the EOL Risk Score for Claude (Anthropic) claude-sonnet-4-5-20250929?

Accepted Answer

Claude (Anthropic) claude-sonnet-4-5-20250929 has an EOL Risk Score™ of 38 out of 100, placing it in the Medium risk band. The score is calculated from four factors: EOL Recency (8/40), Attack Surface (20/30), CISA KEV Exposure (0/20), and Extended Support Availability (10/10).

Question 2

Is Claude (Anthropic) claude-sonnet-4-5-20250929 still supported?

Accepted Answer

Claude (Anthropic) claude-sonnet-4-5-20250929 is currently supported. End of life is scheduled for September 29, 2026. Plan your migration before that date to avoid security risk.

Question 3

When does Claude (Anthropic) claude-sonnet-4-5-20250929 reach end of life?

Accepted Answer

Claude (Anthropic) claude-sonnet-4-5-20250929 reached (or will reach) end of life on September 29, 2026. After this date, no security patches or bug fixes are issued by the vendor.

Question 4

What are the security risks of running Claude (Anthropic) claude-sonnet-4-5-20250929 after end of life?

Accepted Answer

After end of life, Claude (Anthropic) claude-sonnet-4-5-20250929 no longer receives security patches. Any newly discovered CVEs remain unpatched indefinitely. Organizations running EOL software also face compliance violations under SOC 2, PCI DSS, HIPAA, and ISO 27001, which require use of supported software versions.