Anthropic Claude Update Version Claude Opus 5

Claude Opus 5 is now available on all platforms, with improved performance and lower cost than Opus 4.8. The launch also adds beta support for mid-conversation tool changes on the Claude Platform and automatic API fallbacks for safety-flagged requests.

• Safety classifiers block binary-based vulnerability scanning, penetration testing, and exploit generation.
• Cyber Verification Program (CVP) users can access a version with fewer security restrictions.
• Automatic fallbacks on the API can route safety-flagged requests to another model instead of blocking them.

• Claude Opus 5 becomes the new default model on Claude Max and the strongest model on Claude Pro.
• Mid-conversation tool changes in beta let developers change available tools without invalidating the prompt cache.
• Automatic fallbacks in beta let API requests route to the best available model by default when safety classifiers flag them.
• Fast mode runs at around 2.5 times the default speed.

• Opus 5 remains behind Mythos 5 on cybersecurity tasks and exploit development.
• Biology-related requests blocked on Fable 5 now route to Opus 5 rather than Opus 4.8.

• Available on all platforms through the Claude API as claude-opus-5.
• Pricing is $5 per million input tokens and $25 per million output tokens, matching Opus 4.8.
• Fast mode is priced at twice the base price on the Claude Platform and is available through usage credits in Claude Code.
• Consistent with prior Opus models, Opus 5 does not have data retention requirements for general access.

Product Information

Vendor: Anthropic

Product: Claude

Product type: Other

Platform: Web

Version: Claude Opus 5

Vendor release date: Jul 24, 2026

Original release notes: View on vendor site

Published on updatealert.io: Jul 29, 2026

Description: AI assistant for drafting, analysis, coding, and enterprise workflows.