Open models.
Now at frontier quality.
Spend up to 8× less on AI, without giving up reliability, uptime, or quality.
Open models match frontier models on intelligence.
Keln adds what production needs: uptime, predictable latency, consistent output, real support.
Even when a model provider is not. Keln sees the provider slowing down and moves your request before it fails.
Your worst-case latency drops from tens of seconds to a few. The slow P99 tail won't break your product.
Price is fixed per model, so you get the fastest verified capacity.
Prompts and outputs are never stored. Keln routes only to zero-retention providers.
Manage teams, projects, budgets, and API keys from one dashboard, with live spend and usage.
speeds you can count on
2-minute setup.
No commitment.
Change one base URL and start building. Same OpenAI SDK. Pay per token. Stop anytime.
Curated production-ready
open models.
One price per model. Benchmarked continuously on routing probes and live traffic.
Keln is a reliability layer for open models.
Keln reroutes every request the instant a provider slows, verifies the node, normalizes the output, and controls reasoning on every request.
If a provider fails mid-stream, Keln reroutes the request to a backup provider.
You receive one seamless response and are billed once.
More than just a gateway. Keln's continuous provider quality control, predictive routing, and normalization make open models reliable and enterprise-ready.
For every size of team.
Same reliability, from solo engineer to enterprise.
Frontier-grade reliability at 8× lower price
Frontier-grade reliability at 8× lower price
Frontier-grade reliability at 8× lower price
Run one command and Keln sells your idle capacity at a published rate and never touches your own customers' traffic. Self-serve, live in under an hour.
Frequently asked
Everything you need to know about Keln. Still have questions?
Reach out anytime.
One flat price per model, billed per token. You pay the same published rate no matter which provider or node serves the request. Keln routes to the fastest verified capacity. Your cost stays predictable while your latency stays low.
Open models are inexpensive but operationally unreliable: providers silently quantize, throttle, and go down. Keln is the reliability layer. It continuously does quality verification, predictive routing, and output normalization, so you get consistent quality, low tail latency, and zero-downtime failover behind one price and one API.
A single provider is a single point of failure: when they go down, your product goes down, and when they serve a quantized model, your output quality drops. Catching that yourself means retry code, benchmarks, and quality monitoring. Keln removes the single point: a fleet of providers behind one endpoint, verified continuously, rerouted automatically, recovered mid-stream when a node fails.
Most gateways act like a proxy: they forward your request to a provider and hand back what comes out.
Keln actively manages what's behind the endpoint. Every provider is verified continuously, outputs are normalized to one schema so tool calls and reasoning fields behave the same everywhere, and routing is optimized for speed with a learned first-token deadline, a hedged backup route, and mid-stream failover. Enterprise plans add a contractual SLO on latency and uptime. Keln is a reliability layer for open models, not just a router.
Every request is scored against live health and performance signals for each provider: TTFT, throughput, error rate, and quality checks. Keln only routes to capacity that clears your targets, an expected latency under 5 s to first token and at least 50 tok/s, and it predicts slowdowns before they land. If a provider stalls mid-stream, Keln fails over to healthy capacity, so you always end up on the fastest verified provider.
Minutes. Point your existing OpenAI-compatible client at Keln’s endpoint, swap in your API key, and you’re live, no SDK migration and no infrastructure changes.
Yes. Keln is OpenAI-compatible, so any OpenAI SDK or tool works out of the box, just change the base URL and key. Keln is also 100% compatible with the OpenRouter and Vercel AI SDK interfaces.