Source: Anthropic
What was announced
Anthropic has announced Claude Sonnet 5, a new AI model designed to be the most agentic Sonnet model yet. It can make plans, use tools like browsers and terminals, and run autonomously at a level previously requiring larger and more expensive models. It is now the default model for Free and Pro plans and is available for Max, Team, and Enterprise users. It also has introductory pricing of $2 per million input tokens and $10 per million output tokens through August 31, 2026.
Why it matters
Developers can now leverage Claude Sonnet 5 for more advanced agentic tasks at a lower cost compared to Opus 4.8. It offers improved performance in reasoning, tool use, coding, and knowledge work, and is generally safer to use. Developers should consider upgrading to this model for their projects and take advantage of the introductory pricing.
Key takeaways
- Claude Sonnet 5 offers performance close to Opus 4.8 but at a lower cost.
- It is now the default model for Free and Pro plans, making it accessible to a broader range of developers.
- Developers should take advantage of the introductory pricing and consider upgrading to this model for their projects.