Anthropic debuts Claude Sonnet 5.5 running 30% faster than the previous-generation AI model
Claude Sonnet 5.5 ships 30% faster at lower cost—Anthropic's mid-tier workhorse gets a real speed bump.

Why it matters
Anthropic released Claude Sonnet 5.5, a mid-tier model with 30% faster inference speed and lower cost than the previous generation. Practitioners using Sonnet for everyday tasks gain measurable performance and cost improvements; enthusiasts tracking model velocity see Anthropic's iterative shipping cadence narrowing the gap on inference efficiency.
The key facts
5 to knowClaude Sonnet 5.5 announced
30% faster inference than prior Sonnet generation
Lower cost per token (not specified)
Positioned as mid-tier workhorse in Claude family
Designed for everyday tasks
The story so far
Earlier coverage of this storyline
- Anthropic releases Sonnet 5.5, which it calls a significantly cheaper, faster work partnerTechCrunch AI
- This story
Go to the source
SiliconAnglesiliconangle.com
Publisher excerpt: Anthropic PBC today announced the launch of Claude Sonnet 5.5, the most capable mid-tier model in the company’s AI family, designed for everyday tasks and a clear upgrade over the previous generation, running over 30% faster at a lower cost. Sonnet operates as the workhorse of Anthropic’s Claude…