OpenAI and Anthropic are in an open price war as Chinese models undercut by 60-90%.

OpenAI cut GPT-5.6 Luna roughly 80%, from $1 to $0.20 per million input and $6 to $1.20 output. Anthropic priced Opus 5 at $5/$25 per million, half of Fable 5. The trigger is DeepSeek, Zhipu's GLM-5.2 and Moonshot's Kimi K3 landing 60-90% below US flagship pricing, with DoorDash and Airbnb publicly named as moving workloads on cost. Ars Technica Hold the counter-argument: better models burn fewer tokens per completed task, so per-token price is not per-task cost.