Vercel AI Gateway OpenAI AI Gateway Benchmarks
OpenAI AI Gateway Benchmarks
Last benchmarked August 21, 2026
Request Latency
Cold E2E
521ms
Median
Warm TTFT
441ms
Median
Tokens/sec
59
Median
DNS
0.8ms
Median
TCP
0.8ms
Median
TLS
5.2ms
Median
Cold Connection Breakdown
Where a fresh request's time goes: DNS lookup, TCP connect, TLS handshake, then time to first response byte, then first byte to first streamed token.
DNS0.8ms
TCP0.8ms
TLS5.2ms
To First Byte472.2ms
First Byte → Token15.9ms
Performance Over Time
Iteration Distribution
Cold E2E
Warm TTFT
Tokens/sec
DNS
TCP
TLS
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