Anthropic is raising the bar in the AI coding race, launching a new model called Claude Sonnet 4.5 that it claims can build “production-ready” applications, not just simple prototypes. This represents a major leap in reliability and a direct challenge to rivals like OpenAI’s GPT-5.
The new AI, now available, is designed to be a powerhouse for software developers—anthropic claims to deliver industry-leading performance on coding tests. However, the company claims that the real magic lies in its ability to handle long, complex tasks. One Anthropic researcher said he watched Claude Sonnet 4.5 code on its own for up to 30 hours, performing tasks ranging from building an application and setting up a database to buying a domain name and conducting a security audit.
This is a significant development for Anthropic, which has become a favorite among developers and major companies, such as Apple and Meta, due to its coding prowess. The company is betting that this new, more reliable model will help it maintain its edge in the fiercely competitive AI market.
Alongside the new model, Anthropic is also releasing a new tool to help developers build their own AI “agents,” a sign that it is serious about making its technology the foundation for the next generation of software development.
The AI world is moving incredibly fast, with major companies releasing new and improved models every few months. This latest launch from Anthropic shows just how intense the competition has become.
