Finest vs OpenRouter
Last updated 2026-08-19
OpenRouter is a model marketplace: one key, hundreds of models, and a published platform fee on the money that flows through it. Finest is an optimization gateway: it serves the model you asked for by default, swaps in a cheaper configuration only where sealed evidence proves quality holds, and takes 25% of the savings it can prove per request. If it saves you nothing, it costs you nothing.
| At a glance | Finest | OpenRouter |
|---|---|---|
| What you buy | Lower spend, proven per request | Access to many models with one key |
| Fee model | No model markup. 25% of proven savings per request. No saving, no fee. | 5.5% on credit purchases; bring-your-own-key traffic free to a monthly allowance, then 5% (published, August 2026) |
| Who picks the model | Your requested model, served verbatim, unless sealed evidence authorizes better. | You do, per request or via routing presets |
| Proof of value | A receipt per request: model served, evidence, saving. | Usage dashboard and activity log |
| API shape | OpenAI-compatible and Anthropic-compatible | OpenAI-compatible |
| Leaving | FINEST_DISABLE=1, one line | Swap the base URL back |
Choose Finest when
- Production traffic where the bill is the problem and someone has to prove it went down.
- You want your requested model to stay the default, with substitutions authorized by evidence rather than by a preset.
- You want the vendor incentive aligned: Finest earns only from savings it can show you the receipt for.
Choose OpenRouter when
- You want the widest possible catalog for exploration, including community and niche models.
- You are prototyping and want to hop between models by name with no other machinery.
- You want consumer-style credits you can top up and spend anywhere in the catalog.
The fee math, side by side
OpenRouter charges for the pipe. As of August 2026 its published platform fee is 5.5% when you buy credits, and bring-your-own-key traffic is free up to a monthly allowance and then 5% of what the same calls would have cost. The fee applies whether or not the routing saved you anything, because the product is access, and access is what you pay for.
Finest charges for the result. Tokens are billed at the host's published rate with no markup, and Finest's fee is 25% of the saving it can prove on a request, computed against what your requested model would have cost. A request served exactly as you asked, with no saving, carries no fee. The two models produce the same bill only in the case where Finest did nothing for you, and in that case Finest is free.
Who decides which model runs
On OpenRouter, model choice is yours: you name a model, or opt into routing presets that trade among providers for price and availability. That is the right design for a marketplace. It also means quality control stays your job.
Finest treats the requested model as the contract. Every request serves exactly as asked unless the full request configuration matches a versioned, published evidence bar that authorizes a cheaper configuration for that task class. A cheaper arm that refuses, or fails a machine-checkable validator, escalates back to the requested model. The receipt names the model that ran and the evidence behind the decision, and you can verify it at finest.so/verification.
Switching takes one edit
Both products speak the OpenAI wire shape, so moving between them is a base URL and a key. Point your existing client at https://api.finest.so with a Finest key and every request flows; Finest also accepts the Anthropic Messages shape natively. The full agent-executable install is published at finest.so/llms.txt, and FINEST_DISABLE=1 removes Finest in one line.
Questions people ask
- Is Finest OpenAI-compatible like OpenRouter?
- Yes. Finest serves OpenAI Chat Completions and Anthropic Messages. For most codebases the migration is a base URL and a key, in either direction.
- Does Finest have a free tier like OpenRouter?
- No. A Finest workspace funds itself before its first request. The guarantee runs the other way: if Finest proves no saving on your traffic, Finest charges no fee.
- Can I still pin an exact model on Finest?
- Yes. A pinned model is served verbatim, never second-guessed, and still gets a receipt per request.
- Which is cheaper for high-volume production traffic?
- Compare worst cases. On OpenRouter the worst case is list price plus the platform fee. On Finest the worst case is list price with no fee at all, because the fee exists only as a share of proven savings.
In 2 minutes, start cutting your API spend without sacrificing quality. Free if you don’t save money.
No model markup. You pay the host’s rate. 25% of what it proves it saved on a request. No saving, no fee.