Claude Sonnet 5
Claude Sonnet 5 is a frontier model from Anthropic (US), released 2026-06-30. It is currently ranked #3 on Hivig’s tracker.
Data status: Under review
- Organization
- Anthropic
- Country of origin
- US
- Model type
- frontier
- Release date
- 2026-06-30
- Current rank
- #3
- Benchmark score
- Not yet sourced (Source not yet verified)
- Market status
- Private — funding data not yet sourced
Cost to build with Claude Sonnet 5
Claude Sonnet 5 costs $2.00 per 1M input tokens and $10.00 per 1M output tokens. Cached prompts get a further 90% discount. Batch inference is available at a further 50% discount.
Build risk & technical debt
Building agents on Claude Sonnet 5 carries low lock-in risk. It does not require a separate routing or orchestration layer. It is closed-weight, available only through its provider's own hosting. It's available via Direct API, Bedrock, Vertex AI.
Claude Sonnet 5 has native MCP (Model Context Protocol) support. It does not expose an OpenAI-compatible API. Its agentic tool-use maturity is rated strong.
Frequently asked questions
What country is Claude Sonnet 5 developed in?
Claude Sonnet 5 is developed by Anthropic, headquartered in the United States.
How much does Claude Sonnet 5 cost to use?
Claude Sonnet 5 costs $2.00 per 1M input tokens and $10.00 per 1M output tokens. Cached prompts get a further 90% discount. Batch inference is available at a further 50% discount.
What's the lock-in risk of building agents on Claude Sonnet 5?
Building agents on Claude Sonnet 5 carries low lock-in risk. It does not require a separate routing or orchestration layer. It is closed-weight, available only through its provider's own hosting. It's available via Direct API, Bedrock, Vertex AI.
Does Claude Sonnet 5 support MCP or an OpenAI-compatible API?
Claude Sonnet 5 has native MCP (Model Context Protocol) support. It does not expose an OpenAI-compatible API. Its agentic tool-use maturity is rated strong.
Which companies use Claude Sonnet 5 to build agents?
Rocket Money uses Claude Sonnet 5 to build agents.
Where developers are using Claude Sonnet 5
Rocket Money uses Claude Sonnet 5 to build agents.
Rocket MoneyAccounting & Finance
Rocket Money built Rowan, a text-message financial agent, on a classifier-and-subagent architecture: a Haiku 4.5 classifier routes each request to a single-responsibility subagent, with Sonnet 5 running most of them and Opus 5 reserved for financial tasks that need deeper reasoning. The system runs in production on Claude via Amazon Bedrock. Rocket Money's monthly code commits grew 11x (from 11 in December to 128 in July) as the team built the agent, with near-zero hallucinations across Rowan's beta.
Source