AI Development
Claude Sonnet 5
Anthropic's mid-tier Claude model released June 30, 2026 and billed as its most agentic Sonnet yet, with stronger tool use and planning that approaches Opus 4.8 on low and medium effort.
In depth
Anthropic's mid-tier Claude model released June 30, 2026 and billed as its most agentic Sonnet yet, with stronger tool use and planning that approaches Opus 4.8 on low and medium effort. Its model ID is claude-sonnet-5, priced at an introductory $2 per million input and $10 per million output tokens through August 31, 2026 before standard $3/$15 pricing. It ships with cyber safeguards on by default and a lower rate of undesirable behaviors than Sonnet 4.6.
Example
In practice, developers reach for Claude Sonnet 5 when they need the capability described above as part of an AI feature or workflow.
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FAQ
Common questions
What is Claude Sonnet 5?
Anthropic's mid-tier Claude model released June 30, 2026 and billed as its most agentic Sonnet yet, with stronger tool use and planning that approaches Opus 4.8 on low and medium effort.
Why does Claude Sonnet 5 matter for AI developers?
Claude Sonnet 5 sits in the AI Development part of the AI stack. Understanding it helps you make better decisions when building, debugging, and shipping AI features.
Where can I learn more about Claude Sonnet 5?
Developers Digest publishes tutorials and videos that cover AI Development topics including Claude Sonnet 5. Check the blog and YouTube channel for hands-on walkthroughs.
Related
Related terms
AI Development
Mythos 5
The uncapped sibling of Fable 5, announced by Anthropic on June 9, 2026 as the same underlying model with the safeguards lifted in some areas.
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Perplexity
A metric that measures how well a language model predicts a sequence of tokens.
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