Anthropic introduces Claude Sonnet 5, a cost-effective agentic AI model

Jun 30, 2026

AI Summary

Anthropic has launched Claude Sonnet 5, a new AI model designed to perform agentic tasks at a lower cost than previous models. It offers enhanced capabilities for planning, tool usage, and autonomous operation, making it suitable for a wider range of applications.

Claude Sonnet 5 is a more powerful version of Anthropic's midsize model, designed for agentic capabilities.
The model can autonomously make plans, use tools, and operate without human oversight, reflecting a trend among AI companies to enhance agentic functionalities.
Starting at $2 per million input tokens and $10 per million output tokens, Sonnet 5 is cheaper than its predecessor Opus 4.8 and competitors like OpenAI’s GPT-5.5 and Google’s Gemini 3.1 Pro.
Sonnet 5 shows significant improvements over Sonnet 4.6 in areas such as reasoning, tool use, and knowledge work, with a score of 63.2% in agentic coding.
It is designed to complete complex tasks more effectively than previous models, with a lower rate of undesirable behaviors and improved safety features.
While Sonnet 5 is not as accurate as Opus 4.8 for certain tasks, it provides a more affordable option for developers seeking quality performance.
The model is available for free and Pro plans, and it will be the default model for all subscriptions starting Tuesday.

anthropicclaude sonnet 5agentic capabilitiespricinggpt-5.5

Anthropic introduces Claude Sonnet 5, a cost-effective agentic AI model

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