How to Use Claude Sonnet 5 API

Description and use

<h2> Quick Answer </h2> <p><a href="https://www.cometapi.com/models/anthropic/claude-sonnet-5/" rel="noopener noreferrer">Claude Sonnet 5 API</a> is Anthropic's new Sonnet-class model for coding agents, long-context reasoning, tool use, and professional knowledge work. Anthropic announced Claude Sonnet 5 on June 30, 2026, positioning it as the most agentic Sonnet model yet and a major upgrade from Claude Sonnet 4.6. Developers can use it through <a href="https://www.cometapi.com/" rel="noopener noreferrer">CometAPI</a> with the model ID <code>claude-sonnet-5</code> via the native Anthropic Mes

Problem

<h2> Quick Answer </h2> <p><a href="https://www.cometapi.com/models/anthropic/claude-sonnet-5/" rel="noopener noreferrer">Claude Sonnet 5 API</a> is Anthropic's new Sonnet-class model for coding agents, long-context reasoning, tool use, and professional knowledge work. Anthropic announced Claude Sonnet 5 on June 30, 2026, positioning it as the most agentic Sonnet model yet and a major upgrade from Claude Sonnet 4.6. Developers can use it through <a href="https://www.cometapi.com/" rel="noopener noreferrer">CometAPI</a> with the model ID <code>claude-sonnet-5</code> via the native Anthropic Mes

Outcome

<h2> Quick Answer </h2> <p><a href="https://www.cometapi.com/models/anthropic/claude-sonnet-5/" rel="noopener noreferrer">Claude Sonnet 5 API</a> is Anthropic's new Sonnet-class model for coding agents, long-context reasoning, tool use, and professional knowledge work. Anthropic announced Claude Sonnet 5 on June 30, 2026, positioning it as the most agentic Sonnet model yet and a major upgrade from Claude Sonnet 4.6. Developers can use it through <a href="https://www.cometapi.com/" rel="noopener noreferrer">CometAPI</a> with the model ID <code>claude-sonnet-5</code> via the native Anthropic Mes

Evidence

How to Use Claude Sonnet 5 API

Source