Gradient Labs is bringing a dedicated AI account manager to every bank customer. The London-based startup, founded by former Monzo AI leads, uses OpenAI’s GPT-4.1 and GPT-5.4 mini and nano to handle complex financial support workflows. Think fraud cases or blocked payments—situations that usually mean being bounced between teams and waiting in endless queues. Their system follows strict banking procedures in real time, handling interruptions and topic switches with 500-millisecond latency. In benchmarks, GPT-4.1 hit 97% trajectory accuracy, while the next best provider managed only 88%. That gap, as the co-founder puts it, is the difference between resolving a call and creating a compliance incident. Gradient Labs is now moving most of its production traffic to GPT-5.4 mini and nano for voice conversations. Why it matters: This shows how purpose-built AI agents can finally handle the messy, multi-step procedures that define high-stakes customer service, potentially making ‘escalate to a manager’ a thing of the past.