OpenAI (Direct) OpenAI AI Gateway Benchmarks

OpenAI AI Gateway Benchmarks

Last benchmarked August 21, 2026

No-gateway control — a direct call to OpenAI's API, used to measure how much latency each gateway adds.

Baseline

100% success

No gateway involved — a direct call to Anthropic's API, used as the no-gateway control every other provider is compared against.

Cold E2E

383ms

Median

Warm TTFT

344ms

Median

Tokens/sec

Median

DNS

0.8ms

Median

TCP

1.0ms

Median

TLS

2.7ms

Median

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

TCP1.0ms

TLS2.7ms

To First Byte240.5ms

First Byte → Token132.2ms

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