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Anthropic Claude Update Version Claude Sonnet 5

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Update Summary

Claude Sonnet 5 launches with major improvements in reasoning, tool use, coding, and knowledge work. It is available across Claude plans and the Claude API, with introductory pricing through Aug 31, 2026.

Update Details

Security

  • Safety improvements reduce undesirable behaviors, including better resistance to prompt injection and malicious requests.
  • Cyber safeguards are enabled by default for Sonnet 5 to detect and block dangerous cyber usage in real time.
  • The model shows lower capability for potentially harmful cybersecurity tasks than current Opus models.

New Features

  • Claude Sonnet 5 is now the default model for Free and Pro plans and is available to Max, Team, Enterprise, Claude Code, and the Claude Platform.
  • Introduces adjustable effort levels for a wider cost-performance range, including stronger medium-effort efficiency.
  • Launches with introductory API pricing of $2 per million input tokens and $10 per million output tokens through Aug 31, 2026.

Hints

  • Sonnet 5 uses an updated tokenizer, so the same input may map to about 1.0–1.35x more tokens depending on content type.
  • Rate limits were increased across Chat, Cowork, Claude Code, and the Claude Platform to support higher token usage.
  • Organizations enrolled in the Cyber Verification Program automatically have access on Sonnet 5 without reapplying.
Product Information

Vendor: Anthropic

Product: Claude

Product type: Other

Application category: Business

Platform: Web

Version: Claude Sonnet 5

Vendor release date: Jun 30, 2026

Published on updatealert.io: Jul 1, 2026

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

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