Claude (Anthropic) Claude Opus 4.8 · Version Status
Claude (Anthropic) Claude Opus 4.8 End of Life Date
Claude (Anthropic) Claude Opus 4.8 end-of-life date, support status, and CVE risk. Data from endoflife.date and official vendor documentation.
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Claude (Anthropic) Claude Opus 4.8 is actively supported. EOL date: May 28, 2027.
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EOL Date
May 28, 2027
267 days remaining
Latest Release
—
Standard release
Release Date
May 28, 2026
Claude (Anthropic) Claude Opus 4.8 series
Lifecycle detail
Claude (Anthropic) claude-opus-4-8 was released on May 28, 2026 and support is scheduled to end on May 28, 2027 — a planned supported lifespan of 1 year, in line with the 1 year and 1 month median for Claude (Anthropic) releases.
Attack Surface
20/30 High tier
CISA KEV Exposure
0/20 Not in KEV
Extended Support
10/10 None available
EOL Risk Score™ — proprietary methodology by endoflife.ai. Factors: EOL recency, attack surface breadth, CISA KEV catalog presence, extended support availability. Updated at every build.
Methodology → ·
View score card →
All Claude (Anthropic) Versions
What does Claude (Anthropic) Claude Opus 4.8 end of life mean?
When Claude (Anthropic) Claude Opus 4.8 reaches end of life, the maintainers stop issuing security patches for this version. CVEs discovered after the EOL date are publicly disclosed on the National Vulnerability Database with no patch available. Exploit code frequently appears on GitHub within days of disclosure.
The CVE blind spot: Most vulnerability scanners check for known CVEs but do not flag the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Running Claude (Anthropic) Claude Opus 4.8 past its EOL date creates a permanently growing attack surface that standard security tooling will not surface.
Migrate to Claude (Anthropic) Claude Mythos 5.1 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Claude (Anthropic) Claude Opus 4.8 reach end of life?
Claude (Anthropic) Claude Opus 4.8 reached end of life on May 28, 2027. That is 267 days remaining.
Is Claude (Anthropic) Claude Opus 4.8 still supported?
Yes, Claude (Anthropic) Claude Opus 4.8 is currently supported. The EOL date is May 28, 2027.
What should I upgrade to from Claude (Anthropic) Claude Opus 4.8?
The recommended upgrade from Claude (Anthropic) Claude Opus 4.8 is
Claude (Anthropic) Claude Mythos 5.1 — the latest actively supported version. Check the
Claude (Anthropic) full timeline for all supported versions.
What are the security risks of running Claude (Anthropic) Claude Opus 4.8 past EOL?
When Claude (Anthropic) Claude Opus 4.8 reaches end of life, the maintainers stop issuing security patches. Any CVEs disclosed after the EOL date accumulate with no remediation path. Most vulnerability scanners do not flag this — it is the CVE blind spot. Organizations running EOL Claude (Anthropic) should migrate immediately or implement compensating controls.