Claude Sonnet
Editorial coverage of Claude Sonnet.
Anthropic's mid-tier Claude model, used across the Claude apps, the API and a growing list of third-party coding tools.
Who makes Claude Sonnet
Built by Anthropic, an AI safety and research company founded in 2021 and headquartered in San Francisco. Anthropic sells Claude directly through claude.ai and via its developer API, and distributes the models through cloud partners.
Official website: claude.ai ↗
What it actually does
Claude Sonnet is the balanced tier of the Claude model family — positioned between the smaller, faster Haiku models and the largest frontier tier. It handles long-context reading, structured writing, analysis and code, and is the model most Claude subscribers use day to day.
Product family
- · Claude apps (web, desktop, mobile)
- · Claude Sonnet, Haiku and Opus model tiers
- · Claude Code (terminal coding agent)
- · Anthropic developer API
What people hire it for
- Long-form drafting and editorial rewriting
- Summarising and interrogating long documents
- Code generation, refactoring and review
- Structured extraction from messy source material
Where it runs
Security & privacy
Anthropic publishes a usage policy and states that consumer conversations are not used to train models by default; API and commercial traffic are covered by its commercial terms. Enterprise controls are documented per plan.
AI capabilities
The product is the model: long-context reasoning, tool use, document analysis and agentic coding via Claude Code.
Where Claude Sonnet appears
Featured in these buying guides
Not yet included in a Best-Of round-up. Editorial planned for the next update cycle.
Head-to-head
Planned
- Claude Sonnet vs ChatGPT — coming soon
- Claude Sonnet vs Claude — coming soon
- Claude Sonnet vs ChatGPT — coming soon
- Claude Sonnet vs Notion — coming soon
Planned reviews
Full review published — read it here.