What is Claude Sonnet 4.5: Anthropic AI's Best AI Model For Coding, Agentic Tasks And Computer Use
You know when you're about to finishing to do something and then..
Something new pop out and you have to do the thing again by adding the new thing? Well, this happened to me.I was just finishing to configure my AI assistant, Draco AI with access to 30+ premium AI models when Claude announced their newest model Claude Sonnet 4.5.
So, I moved fast to find out what's new have been introduced with the latest Claude model and tested it. In this article, I will discuss about Claude Sonnet 4.5 and it's capabilities and how you can start to use it.
What is Claude Sonnet 4.5?
Claude Sonnet 4.5 is currently Anthropic AI's best coding model in the world. The model is designed to build complex AI Agents, and it has substantial improvements in tasks that requires reasoning and math.
Claude Sonnet 4.5 aims to transform:
- Autonomous operation over long horizons (hours to days).
- Multi-agent coordination, and domain reasoning.
- Maintaining or improving alignment and safety
- Upgrade the Claude ecosystem (APIs, development tools, product integrations)
What Changes With Claude Sonnet 4.5?
Claude Sonnet 4.5 excels on the SWE-bench Verified evaluation, which measures real-world software coding abilities. This benchmark was proved by doing doing tests and the models resulted to maintaining focus for more than 30 hours on complex, multi-step tasks.
The model also showed improved capabilities on a wide range of evulations including reasoning and math, check the image provided by Claude below:
Claude Sonnet 4.5's improved capabilities and extensive safety training have allowed to improve the model’s behavior, reducing concerning behaviors like sycophancy, deception, power-seeking, and the tendency to encourage delusional thinking.
Check the image below how Claude Sonnet 4.5 stands compared to other models like Gemini 2.5 Pro, GPT-5 and Grok 4.
How To Use Claude Sonnet 4.5?
To get started using Claude Sonnet 4.5 is really simple, you can follow this guide and get ready to use it in few minutes. Before starting, if you want to try Claude Sonnet 4.5 and many other premium models like Google Gemini 2.5 Pro, DeepSeek, Claude 4.5 and many others without spending hundreds of dollars in subscriptions, you can use the platform i've built that saves you money and time in AI.
You can start saving your money with MindAI, and focus on what matters, click the button below to get started.
Start 7-day free trialYou can use Claude Sonnet 4.5 on the Claude platform by registering there first. Once registered you will be required to verify your account with your phone number. Finally, after confirming all the details you will be able to start using Claude Sonnet 4.5 with limited daily usage.