Baseten and Postman: Building reliable, cost-efficient agents for the enterprise

Postman's Agent Stack (Passport, Fabric, Astropods, Fern) provides tools to build, secure, and govern enterprise agents, while Baseten serves as its recommended inference partner, offering fast model APIs, multi-cloud capacity management with zero data retention by default, and post-training infrastructure. Baseten cites seven 2026 model launches ranking in the top two on Artificial Analysis for throughput and latency, and notes Harvey post-trained a 27B open model to match closed-source frontier performance on its legal agent benchmark. The post describes post-training via supervised fine-tuning and reinforcement learning, with customers retaining model weights, evaluations, and training scripts.