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Ranks providers by estimated time to return 500 tokens, combining the wait for the first token with output speed.
OpenAI currently ranks first at 253.72 s via openai.
| Rank | Provider / route | Estimated response time | Speed measurements | Endpoint details |
|---|---|---|---|---|
| #1 | Provider / route OpenAI openai | Estimated response time253.72 s | Speed measurements
| Endpoint details
|
Endpoint data fetched .
GPT-5.2 Pro endpoint guide
1 of 1 GPT-5.2 Pro endpoint currently have the published data required for this ranking. OpenAI leads at 253.72 s via openai. The table keeps unranked routes visible so missing measurements do not look like missing provider availability.
The fastest ranking estimates a 500-token answer by adding the recent median first-token wait to 500 divided by median output throughput. It represents an example complete response, not a guarantee for every prompt or request size.
Only 1 route currently qualifies, so the rank alone provides limited choice. Review every visible endpoint for price, speed, uptime, context length, and route-specific configuration.
GPT-5.2 Pro has 1 published provider option, and performance data is matched to each exact OpenRouter routing tag. Different quantization, context, regional deployment, or provider configuration can change price and behavior even when the underlying model name is identical.
