Anthropic launches Claude Sonnet 5.5: 30% faster, up to 30% cheaper for most work
ClaudeDevs · x · 2026-09-29
Anthropic introduces Claude Sonnet 5.5, the second model in the Claude 5.5 family. It is a clear upgrade over Sonnet 5, runs more than 30% faster, and costs up to 30% less for most workloads. ClaudeDevs reports up to 20% lower costs on the Claude Platform and 30% more usage in Claude Code. It is positioned for well-scoped everyday tasks like fixing bugs and quickly iterating on features, and is available now in the Claude Platform and Claude Code.
Related event: Anthropic Launches Claude Sonnet 5.5: Over 30% Faster, Up to 30% Cheaper(58 posts)→
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