Changelog

Claude Sonnet 4.5: Anthropic's Latest AI Model Now Available

You can now access Claude Sonnet 4.5 across our entire platform, with improved performance while maintaining the same pricing as previous versions!

Claude Sonnet 4.5 is now fully integrated into Relevance AI as an LLM Step, an Agent Model, and in Chat. This latest model from Anthropic offers enhanced capabilities across nearly all performance metrics, outperforming its predecessor Sonnet 4 and even Opus 4.1 in most areas, while maintaining competitive pricing.

➡️ Access massive context windows – Choose between 200K or 1M token versions to handle extensive documents and complex tasks

➡️ Enjoy improved intelligence – Benefit from performance that exceeds previous Claude models and rivals GPT-5 in most categories

➡️ Maintain budget predictability – Same pricing as Sonnet 4, though higher than some competitors like GPT-5 and Gemini 2.5

➡️ Find it easily – Now featured as "Recommended" in our Claude section for quick access

➡️ Plan for processing time – Be aware of somewhat slower speeds compared to GPT-5 and Gemini 2.5 Flash

With Claude Sonnet 4.5, you can tackle more complex reasoning tasks, process larger documents, and achieve better results without adjusting your budget allocations.

To start using Claude Sonnet 4.5, simply select it from the "Recommended" section in our Claude offerings when creating an LLM Step, configuring an Agent Model, or starting a Chat.