# OpenAI shares lessons from deploying long-running AI models > Source: > Published: 2026-07-20 12:00:00+00:00 [OpenAI](https://openai.com/index/safety-alignment-long-horizon-models) ### OpenAI shares lessons from deploying long-running AI models Which summary reads better? Pick one — models revealed after.Both summaries are AI-generated. Models that run autonomously over long task horizons introduce failure modes that don't show up in single-turn evals: goal drift, compounding errors, and unsafe intermediate actions that only surface across a full trajectory. If you're running agents in production, this means your safety and monitoring can't be point-in-time—you need trajectory-level observability, checkpoints, and the ability to interrupt mid-task, because a model that passed your prompt-level guardrails can still go off the rails over a multi-step run. Long-horizon models introduce novel safety risks and failure modes that bypass static pre-deployment evaluations, shifting the primary alignment bottleneck directly to the production runtime. For engineers shipping autonomous agents, this means traditional input-output filtering is no longer sufficient, requiring you to build active monitoring and state-tracking guardrails directly into your agentic execution loops. To prevent cascading tool-use failures and runaway API costs, your deployment infrastructure must be capable of dynamically detecting and halting anomalous agent behavior in real time.