What is the cheapest Stealth model?

Union Alpha at free per 1M input tokens and free per 1M output tokens (vendor list price).

Which Stealth model has the largest context window?

Union Alpha accepts 262K tokens of context.

How do I route to Stealth models with OpenSmartRoute?

Declare a target in targets.yaml with metadata.model set to the catalogue id (for example stealth/union-alpha); the router scores it against every other target on cost, quality, latency and your policies for each request.

All vendors

Vendor

Stealth models

1 model in the reference catalogue, vendor list prices per million tokens. 0 are routable on this deployment today.

Models

0 routable here

Cheapest (blended)

free

Union Alpha

Median list price

free

3:1 input to output per 1M tokens

Strongest

no published benchmarks

Every Stealth model

Newest first. Prices are the vendor's published rates per million tokens; click a model for the full specification.

Model	Released	Context	Input / 1M	Output / 1M	Intelligence	Capabilities
Union Alphastealth/union-alpha	Sep 16, 2026	262K	free	free	-	tools

Frequently asked

What is the cheapest Stealth model?: Union Alpha at free per 1M input tokens and free per 1M output tokens (vendor list price).
Which Stealth model has the largest context window?: Union Alpha accepts 262K tokens of context.
How do I route to Stealth models with OpenSmartRoute?: Declare a target in targets.yaml with metadata.model set to the catalogue id (for example stealth/union-alpha); the router scores it against every other target on cost, quality, latency and your policies for each request.

Route Stealth with everything else

OpenSmartRoute picks the cheapest model that meets your quality bar per request, so a Stealth flagship handles hard prompts while small models take the rest. Price a workload or try a routing decision live.

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