Production LLM Benchmarks: DeepSeek v4 vs GPT-4o and Others for High-Volume Inference

Short summary

Production evaluation of DeepSeek v4 Flash vs Gemini 2.0 Pro for high-volume ranking systems. DeepSeek delivers 320 tokens/sec with p99 latency of 1.18s (fitting a 2.4s budget) and costs $0.27/$1.10 per million tokens, roughly 10x cheaper than GPT-4o while maintaining 99.94% availability across three regions. For 100M monthly input tokens, the monthly bill drops from $650 to $71.

• •DeepSeek v4 Flash achieves p99 latency of 1.18s with 320 tokens/sec throughput, fitting within 2.4s production SLA
• •Cost is 10x lower than GPT-4o ($71/month vs $650/month for 100M input tokens); author's fleet saved $14,200/month switching from GPT-4o
• •Delivered 99.94% availability across three regions with multi-region failover pattern; includes Python SDK code pattern

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