Anthropic · model releaseClaude Opus 4.8

Valid from

2026-05-28

Valid until

still holds

Published

2026-05-28

Recorded by AsOf

2026-10-29

Checked

2026-10-31 · its source page states the value and the date

Confidence

0.70

Sources

“We’re upgrading Claude Opus to a new version: Claude Opus 4.8. It builds on Opus 4.7 with improvements across benchmarks, and is a more effective collaborator. It’s available today for the same price.”— what the page says, read 2026-10-31

• Claude Platform release notes, May 28, 2026primary · platform.claude.com · 2026-05-28
• Introducing Claude Opus 4.8primary · anthropic.com · 2026-05-28

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