WHY WE PICKED IT
Sonnet 5 is the practical default for most day-to-day work: it closes much of the gap to Opus-tier performance while staying meaningfully cheaper, and Anthropic made it the automatic replacement for Sonnet 4.6 across the free and Pro tiers.
GETTING STARTED
Access Claude Sonnet 5 via the Claude web or mobile app (it's now the default model on Free and Pro plans) or through the Anthropic API. Launch pricing is $2/M input and $10/M output tokens through August 31, 2026, moving to standard $3/M input and $15/M output after that.
QUICK TIPS
1
Use it as your default before reaching for Opus: it closes most of the performance gap at much lower cost
2
Take advantage of its autonomous tool use for multi-step agentic tasks
3
Let it self-check output on complex tasks rather than re-prompting immediately
4
Compare launch pricing against post-August 2026 standard pricing when budgeting
5
Pair with Opus 4.8 for the hardest subtasks in a larger agentic pipeline
PRICING
Freemium
Free tier available
Free tier includes limited features. Paid plans unlock full access, higher usage limits, and commercial usage rights.
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FREQUENTLY ASKED QUESTIONS
Q
Is Claude Sonnet 5 free?
A
Claude Sonnet 5 offers a free tier with optional paid upgrades.
Q
Does Claude Sonnet 5 have an API?
A
No, Claude Sonnet 5 does not appear to offer a public API.
Q
What is Claude Sonnet 5 best for?
A
Claude Sonnet 5 is best for Best for Everyday Agentic Work. Claude Sonnet 5 is Anthropic's mid-tier model released June 30, 2026, replacing Sonnet 4. Sonnet 5 is the practical default for most day-to-day work: it closes much of the gap to Opus-tier performance while staying meaningfully cheaper, and Anthropic made it the automatic replacement for Sonnet 4.6 across the free and Pro tiers.
Q
What platforms does Claude Sonnet 5 support?
A
Claude Sonnet 5 supports web, api.
Q
Is Claude Sonnet 5 open source?
A
No, Claude Sonnet 5 is not open source.
Q
How do I get started with Claude Sonnet 5?
A
Access Claude Sonnet 5 via the Claude web or mobile app (it's now the default model on Free and Pro plans) or through the Anthropic API. Launch pricing is $2/M input and $10/M output tokens through August 31, 2026, moving to standard $3/M input and $15/M output after that.
Q
How do I use Claude Sonnet 5?
A
Claude Sonnet 5 is a large language model for text generation, analysis, and conversation. Access through the web interface. Enter prompts or questions to get responses. It excels at near-opus 4.8 performance at a significantly lower price.
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