About this vendor
Vendor-level selection advice by Y-API. The per-model pages linked below carry the model-specific checks; nothing here is a measured comparison.
Where this vendor fits
The pair brackets the catalog’s price range more widely than any other vendor: Luna’s $0.30 input sits at the Flash tier while Sol’s $30 output matches Claude Opus 5 — one vendor covering both the routing floor and the escalation ceiling.
What to watch for
The Luna-to-Sol escalation is a design decision you own: thresholds, validation and routing belong to your application. Neither name provides a hosted agent product — no terminal, browser or filesystem comes with the API call.
Models on Y-API
Prices are account-credit snapshots from the Y-API catalog. Each model links to its own guide with a cost estimator and a request example.
| Model | Context window | Input / 1M tokens | Output / 1M tokens |
|---|---|---|---|
GPT-5.6 Solopenai/gpt-5.6-sol | 1,050,000 | $5.00$0.50 | $30.00$3.00 |
GPT-5.6 Lunaopenai/gpt-5.6-luna | 1,050,000 | $0.30$0.03 | $1.30$0.13 |
Account credit / Cash equivalent · $1 paid adds $10 of credit; the cash equivalent is credit consumed ÷ 10. These are Y-API prices, not the publisher’s list prices.
Choosing within the lineup
Start high-volume bounded tasks on Luna and define the escalation signals before launch: conflicting evidence, repeated validation failure, or reasoning depth. Reserve Sol for cases where a more expensive reviewer measurably changes the outcome.
Before you choose
Should Luna outputs always be checked by Sol?
No — routing everything upward removes the cost advantage. Set escalation triggers from your own evaluation data such as validation failures, ambiguity or stakes, and audit the trigger rate; most classification volume should never reach the flagship.
Sources & scope
Vendor scope on this site is exactly the reviewed model guides listed above; a vendor page exists only while at least one of its models is reviewed. Claims about architecture or positioning follow the cited pages. We do not publish measured latency, uptime or benchmark scores for any vendor.