Hassan Khan
Anthropic has officially rolled out Claude Sonnet 4.5, a next-generation AI model that the company says can move beyond prototypes and build Production Ready Software. The launch comes as competition in the AI industry heats up, with OpenAI’s GPT-5 and other rivals racing to dominate the developer market.
A Leap Beyond Prototypes
For developers, reliability has always been the sticking point when it comes to coding with AI. Anthropic says Claude Sonnet 4.5 changes that. The model reportedly delivers state of the art performance on coding benchmarks like SWE Bench Verified, but the company argues its real strength goes beyond test scores.
David Hershey, a researcher at Anthropic, told TechCrunch he has seen Claude Sonnet 4.5 code autonomously for up to 30 hours, handling everything from setting up databases to buying domain names and even running a SOC 2 audit. In other words, the model isn’t just spitting out snippets of code it’s showing signs of being able to oversee longer, more complex software projects from start to finish.
Developers Already Taking Notice
Several companies that integrate AI into their workflows are backing up Anthropic’s claims. Cursor CEO Michael Truell called the model “state of the art on longer horizon tasks,” while Windsurf CEO Jeff Wang described it as the beginning of a “new generation of coding models.”
See More: Anthropic launches Claude Sonnet 4.5, its best AI model for coding
Anthropic has priced Claude Sonnet 4.5 the same as its predecessor: $3 per million input tokens and $15 per million output tokens. That makes it more accessible to developers who are already building with Claude Sonnet 4, while offering more advanced performance without the cost hike.
Security and Alignment Improvements
Beyond coding muscle, Anthropic is pitching Claude Sonnet 4.5 as its most aligned frontier model to date. The company says it has reduced common issues like sycophancy, deceptive responses, and prompt injection vulnerabilities, making the model safer and more trustworthy for enterprise-level deployment.
New Tools for Developers
Alongside the new model, Anthropic unveiled the Claude Agent SDK, giving developers access to the same infrastructure that powers Claude Code. This opens the door for building custom AI agents with production grade reliability.
There’s also a new research preview called “Imagine with Claude,” available to Max subscribers. Instead of relying on prewritten code, this tool shows Claude generating software in real time based entirely on user prompts.
The Fast Pace of AI Competition
Claude Sonnet 4.5 arrives less than two months after Anthropic’s last flagship model, Claude Opus 4.1. The quick release cycle highlights just how competitive the AI space has become. With Apple, Meta, and other tech giants reportedly using Claude models internally, Anthropic is fighting to hold its ground against OpenAI, Google, and Microsoft in what is now a race defined by months, not years.
For developers, the message is clear: the tools are evolving fast, and with Claude Sonnet 4.5, Anthropic wants to prove it can deliver more than just smart code it wants to deliver software that’s ready for the real world.
Summary
In-Short: Anthropic has launched Claude Sonnet 4.5, a new frontier model built for “production ready” coding, claiming state of the art performance on benchmarks like SWE-Bench Verified. The model can reportedly code autonomously for up to 30 hours, handling tasks from app development to database setup and security audits. Pricing remains the same as Claude Sonnet 4 $3 per million input tokens and $15 per million output tokens. Alongside the release, Anthropic introduced the Claude Agent SDK and a preview feature called “Imagine with Claude.”
