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Claude Sonnet 4.5 Could Be Your Next Breakthrough Coding Tool - How to Access It Today

Claude Sonnet 4.5 codes autonomously for up to 30 hours and improves security and alignment, addressing prompt injection vulnerabilities, Anthropic said.

  • On Monday, Anthropic launched Claude Sonnet 4.5, saying it can run autonomously for 30 hours while building production-ready applications.
  • Opus 4 could run autonomously for seven hours, but Sonnet 4.5 boosts endurance more than fourfold and arrives just four months after Sonnet 4.
  • Developers can access Sonnet 4.5 through the Claude API, Claude Code, and Amazon Bedrock with pricing at $3 per million input tokens and $15 per million output tokens.
  • Claude Code is generating more than $500 million in run-rate revenue with usage growing more than 10X in three months, while Apple and Meta use Claude internally and API customers include Cursor, Windsurf and Replit.
  • Jared Kaplan said `This is the biggest jump in safety that I think we've seen in the last probably year, year and a half` as Anthropic launched the Claude Agent SDK and signaled one or two more releases before the end of the year.
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Anthropic launches new AI model, touting coding supremacy

US startup Anthropic on Monday announced the launch of its new generative artificial intelligence model, Claude Sonnet 4.5, which it says is the world's best for computer programming.

Lean Right

Claude Sonnet 4.5 is also, according to the American giant, the most advanced model for developing AI agents able to make decisions in new situations.

·Paris, France
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NBC Bay Area broke the news in San Francisco, United States on Monday, September 29, 2025.
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