I Cut My OpenAI Bill by 97.5% — Here's My Migration Data

Short summary

Developer benchmarked LLM alternatives and migrated from OpenAI GPT-4o ($10/M output tokens) to DeepSeek V4 Flash ($0.25/M) through Global API, achieving 40× cost reduction with equivalent output quality on 200 real production prompts. Migration required changing only two lines: API key and base URL. Feature parity maintained across chat completions, streaming, function calling, and JSON mode.

• •GPT-4o to DeepSeek V4 Flash: 40× cheaper ($0.25 vs $10.00 per million output tokens)
• •2-line migration using standard OpenAI SDK (just api_key + base_url)
• •Benchmarked on 200 real production prompts with 0.71 inter-rater agreement

Generated with AI, which can make mistakes.