Watermelon Product Update: May 2026
Alexander Wijninga
| 4 min
Watermelon Product Update: May 2026
May was a major month for Watermelon. We not only launched AI Engine 2.0, but also added support for GPT-5.4, strengthened platform security, and introduced several improvements that make our agents smarter, faster, and more reliable.
Here’s a look at the most important updates.
AI Engine 2.0
We’ve completely upgraded the technology behind every Watermelon Agent.
AI Engine 2.0 introduces major improvements in search, source selection, and reasoning. As a result, agents can find more relevant information and provide more accurate answers based on websites, documentation, product feeds, files, and knowledge bases.
→ Experience the AI Engine 2.0
GPT-5.4 Mini & GPT-5.4 Nano
GPT-5.4 Mini and GPT-5.4 Nano are now available in Watermelon.
These new models provide more flexibility for organizations looking to optimize for speed, performance, or cost. This allows you to choose the model that best fits your specific use case.
→ Explore the available models
Improved Security
Security remains a top priority at Watermelon.
We’ve added additional validation, authorization checks, and security measures across the platform. These improvements help prevent unauthorized access to sensitive settings, integrations, and customer data.
We’ve also strengthened several parts of our infrastructure to provide a more secure and reliable experience for all customers.
Better Crawler Results
The quality of an agent starts with the quality of its knowledge.
That’s why we’ve upgraded our crawler to process content more accurately. Agents can now better understand your content sources, resulting in more relevant information retrieval and more reliable answers.
While some crawls may take slightly longer to complete, the improvement in answer quality makes it well worth the wait.
Images in Email Signatures & Footers
You can now add images directly to email signatures and footers.
This makes it easy to include logos, banners, and other visual elements in your outgoing emails, creating a more professional and consistent brand experience for your customers.
→ Add images to your email signature
New Agent Overview
We’ve completely redesigned the Agent Overview page.
With improved navigation and a cleaner structure, managing agents is now faster and more intuitive. The new foundation also enables us to introduce additional functionality more efficiently in future releases.
→ Explore the new Agent Overview
Unread Conversation Indicators
To help teams respond faster, we’ve introduced unread conversation indicators.
You can now instantly see which conversations still require attention and which have already been reviewed. For teams handling large volumes of conversations, this provides better visibility and reduces the risk of missed messages.
→ See the read/unread indicator in action
And Much More
Alongside these headline features, we’ve shipped dozens of improvements and bug fixes across performance, reliability, email processing, onboarding, and the overall user experience.
Every month, we continue working toward a single goal: helping organizations automate more customer conversations with agents that deliver real results.
Curious about what’s next? We have an ambitious roadmap ahead and look forward to sharing more with you soon.