The original title is "Migrating Off OpenAI: A Backend Engineer's Notes From Production"

Short summary

A backend engineer details migrating three production services from OpenAI to DeepSeek V4 Flash via Global API, cutting costs from ~$500/month to ~$12.50 — a 40× reduction with 80% of users unable to distinguish output quality. The migration took roughly three hours because Global API uses OpenAI-compatible endpoints, requiring only api_key and base_url changes. The post includes a pricing comparison table across seven models and Python code examples.

• •Migrated 3 production services from OpenAI to DeepSeek V4 Flash — $500/mo down to ~$12.50/mo
• •OpenAI-compatible endpoint meant only 2 config values changed; migration took ~3 hours
• •Pricing comparison table covers 7 models; 80% of users couldn't distinguish output in blind tests

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