What is Claude Sonnet?

Claude Sonnet is the mid-tier model in Anthropic's Claude family, balancing strong reasoning and coding ability with lower cost and latency than Claude Opus.

Is Claude Sonnet good for coding?

Yes, Sonnet is widely used in coding assistants and developer tools due to its strong performance on programming tasks relative to its cost.

How much does Claude Sonnet cost compared to Opus?

Sonnet is generally priced significantly lower than Opus per token, reflecting its position as the balanced, mid-tier option in the Claude lineup.

Where can I use Claude Sonnet?

Claude Sonnet is accessible through Claude.ai, the Anthropic API, and major cloud platforms such as AWS Bedrock and Google Cloud Vertex AI.

AI Models

Claude Sonnet

By Anthropic

BeginnerModel3.4K learners

Claude Sonnet is the balanced, mid-tier model in Anthropic's Claude family, offering strong reasoning and coding performance at lower cost and latency than Claude Opus.

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Definition

Claude Sonnet is the balanced, mid-tier model in Anthropic's Claude family, offering strong reasoning and coding performance at lower cost and latency than Claude Opus.

Overview

Claude Sonnet occupies the middle tier of Anthropic's Claude lineup, between the high-capability Opus and the fast, lightweight Haiku. It is designed to deliver a favorable balance of intelligence, speed, and cost, which has made it a popular default choice for everyday chat, coding assistants, and production applications that need strong performance without Opus-level expense. Successive Sonnet releases — including Claude 3 Sonnet, Claude 3.5 Sonnet, and later Claude 4-generation Sonnet models — steadily narrowed the capability gap with Opus on many benchmarks, particularly coding and agentic tool-use tasks, while remaining significantly cheaper and faster to run. Sonnet is built with the same Constitutional AI alignment approach used across the Claude family, aiming for helpful and safe outputs. Sonnet is widely used as the default model in coding assistants and developer tools, including Anthropic's own Claude Code, and it is available through Claude.ai, the Anthropic API, and major cloud marketplaces alongside Claude Opus and Claude Haiku.

Key Features

Mid-tier Claude model balancing capability, speed, and cost
Strong coding and agentic tool-use performance
Frequently used as the default model in developer and coding tools
Built with Anthropic's Constitutional AI alignment approach
Large context window for handling long documents and codebases
Available via Claude.ai, the Anthropic API, and cloud marketplaces

Use Cases

General-purpose chat and productivity assistants

Coding assistants and AI pair-programming tools

Content writing, editing, and summarization

Customer support automation

Data analysis and structured document processing

Powering production AI agents at moderate cost

Frequently Asked Questions

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