Scout24 Integrates GPT-5 for Conversational Real-Estate Search
Scout24 has deployed HeyImmo, a conversational real-estate assistant powered by GPT-5, to transition its platform from a traditional search engine into a guided expert experience. This implementation allows users to interact with a "sparring partner" that provides personalized guidance, clarifies user needs, and surfaces relevant property listings.
Technical Implementation and Architecture
Scout24 prioritized a simplified technical architecture over complex multi-agent frameworks to ensure rapid deployment and iterative learning. The system relies on function calling and focused components to optimize for latency, relevance, and performance.
Key capabilities of the HeyImmo assistant include:
- Adaptive Answer Formats: The assistant can provide concise summaries, bulleted lists, or direct property listings featuring image previews based on user preference.
- Conversational Guidance: Rather than just returning search results, the assistant asks clarifying questions to better understand user requirements and refine the search process.
Quality Assurance and Evaluation Frameworks
To ensure the reliability and trust of the AI's responses, Scout24 developed a custom evaluation system based on the OpenAI Evals framework. This system allowed the team to quantitatively define and measure "good enough" quality across various real-estate search scenarios.
Quality control was further reinforced through two primary methods:
- Swarm Testing: Scout24 conducted company-wide internal testing, inviting nearly all employees to stress-test edge cases and provide feedback.
- Strategic Delays: The company delayed the product launch once to ensure the assistant met the predefined quality and safety bars.
Collaboration with OpenAI
Scout24 worked closely with OpenAI Solutions Architects to refine the user experience. This partnership focused on improving answer quality, shaping the structure of responses, and aligning on the standards for a high-quality AI-powered search experience.
Future Roadmap and Expansion
Scout24 intends to expand the AI assistant's capabilities across its entire ecosystem, targeting seekers, landlords, homeowners, and agents. Planned enhancements include assisting agents in the production of verified floor plans and providing more personalized guidance for property seekers to strengthen marketplace network effects.