Short answer: Renting a dedicated cluster to self-host DeepSeek V4.1 Flash costs more than the public API for almost every team. You cross the 76% line, where hardware rental beats DeepSeek's off-peak API price of $0.60 per 1M output tokens, only if you maintain more than 76% sustained GPU utilization day and night. Below that threshold, or with monthly spend under $880,000, paying per token is cheaper.

What did DeepSeek open-source on October 20?

DeepSeek published DeepInfer on October 20, 2026, under the Apache 2.0 license. DeepSeek describes the software as the high-performance inference framework that powers DeepSeek's large-scale production services. By October 25, the GitHub repository reached about 22,300 stars, and the Hacker News discussion passed 2,300 points.

The framework supports one model: DeepSeek-V4.1-Flash. Its default checkpoint is DeepSeek-V4.1-Flash-1017, released on October 17, 2026, with 763B parameters, a 1M-token context window, and MIT-licensed weights.…