Sonnet 5.5 is now available in Cursor
Cursor says Sonnet 5.5 is now available and performs on par with Opus in many tasks.
#sonnet-5-5
View all AI newsClaudeDevs extends preserved thinking on Sonnet 5.5 against account switching
ClaudeDevs is extending preserved thinking with Sonnet 5.5 so thinking stays in the organization that generated it. Switching accounts mid-session makes Claude reread the session and generate new thinking.
Claude Sonnet 5.5 is generally available in GitHub Copilot
GitHub says Anthropic’s Claude Sonnet 5.5 is now generally available in GitHub Copilot, including the Copilot app, CLI, and code. In GitHub’s early testing, it matched Sonnet 5 on coding tasks while using fewer steps, tokens, and tool calls and finishing faster.
Unused Pro, Max, and Team resets can be applied before Oct 22
ClaudeDevs says every Pro, Max, and Team user was granted a reset last Tuesday. Anyone who has not used it can still apply it at any time before Oct 22. Sonnet 5.5 is available now in the Claude Platform and Claude Code.
Sonnet 5.5 shows up to 20% lower Claude Platform costs and more Claude Code usage
ClaudeDevs says Sonnet 5.5 has produced as much as 20% lower costs on the Claude Platform and 30% more usage in Claude Code. Claude calls it the second Claude 5.5 model, more than 30% faster than Sonnet 5 and up to 30% cheaper for most work.
Claude Sonnet 5.5 is now available in v0
v0 now offers Claude Sonnet 5.5. Claude says it is the second model in the Claude 5.5 family, a clear upgrade over Sonnet 5 that runs more than 30% faster and costs up to 30% less for most work.
Claude says Sonnet 5.5 matches or beats Sonnet 5 on most alignment measures
On Claude’s automated behavioral audit, Sonnet 5.5 improves on or matches Sonnet 5 on most alignment and honesty measures. It is also the first Sonnet model with cyber safeguards and fallbacks like those on Claude’s most capable models, and Claude says routine software development is unaffected.