5 LLM APIs Tested for Latency: Real Data [2026] - DEV Community
I benchmarked Claude Haiku 4.5, Claude Sonnet 4, GPT-4.1, GPT-4.1 Mini, and Gemini 2.5 Flash for TTFT, throughput, and end-to-end latency — with a cost-latency decision matrix for production builders.