Downlink

Downlink is an API platform that aims to make production AI calls faster, cheaper and more reliable without changing application code. It sits behind an OpenAI compatible endpoint: developers point their existing OpenAI client at Downlink's base URL with a Downlink API key and keep sending the same chat completion requests. Downlink then works to raise rate limits, cut latency and improve accuracy on that traffic over time. It is aimed at AI engineers running applications in production who spend time managing rate limits, response times and model costs. The site states that Downlink selects the best models for a workload and fine tunes them to the customer's use case, so teams can benefit from tuned models without running their own training pipeline. Because it reuses the standard OpenAI client, it works from Python, TypeScript, Go or plain HTTP calls with no new SDK, which keeps application architecture simple and avoids adding another integration to maintain. The vendor claims performance gains of 20 percent or more; that figure is the vendor's own and is not independently measured. Pricing is not published. Access is by request through the website, and the pricing page returns an access error, so costs are presumably agreed with the vendor. The site's copyright notice reads 2025 and signup remains gated behind an access request, so buyers should confirm availability directly before planning around it.