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Long context

Gemini 3.8 Flash · Vertex API pricing

Google's Gemini series — very long context windows and strong multimodal input.

Model IDvertex/gemini-3.8-flash
ChatStreamingTool callingVision

Call summary

Input
$0.75$0.5625/ 1M tokens
Cache write $0.5625
Cache read $0.05625
Output
$3.75$2.8125/ 1M tokens
Context Window
1.05M
API Endpoints
1

Gemini 3.8 Flash · Vertex API endpoints

One API key — this model is served on the endpoint below.

POST/v1/chat/completionsOpenAI-compatible · Works for every model

Gemini 3.8 Flash · Vertex at a glance

Gemini 3.8 Flash · Vertex (model ID vertex/gemini-3.8-flash) is a Gemini-series text model on Router One. Gemini 3.8 Flash · Vertex is sold on the Vertex sales channel: a separately priced product with an isolated routing pool — requests never fall back to the default channel, its rates and long-context tiers are its own, a plan quota covers it only when the live plan response lists the channel id, and the response model field and Dashboard → Logs carry the channel id. No Router One subscription plan includes Gemini 3.8 Flash · Vertex today; every call bills the wallet at its posted rate. Posted rate: $0.5625 in / $2.8125 out per 1M tokens (was $0.75 in / $3.75 out). Context window: 1.05M tokens. Accepts text, image; returns text. Endpoint: POST /v1/chat/completions (OpenAI-compatible).

Gemini 3.8 Flash · Vertex FAQ

How much does Gemini 3.8 Flash · Vertex cost on Router One?

Gemini 3.8 Flash · Vertex is billed per token on Router One: $0.5625 in / $2.8125 out per 1M tokens, pay as you go.

Is Gemini 3.8 Flash · Vertex included in Router One subscriptions?

No Router One subscription plan includes Gemini 3.8 Flash · Vertex today; every call bills the wallet at its posted rate.

Which endpoints serve Gemini 3.8 Flash · Vertex?

Gemini 3.8 Flash · Vertex is served on POST /v1/chat/completions (OpenAI-compatible). Any Router One API key works there.

What is Gemini 3.8 Flash · Vertex's context window?

Gemini 3.8 Flash · Vertex accepts up to 1.05M tokens of context per request on Router One.

What does the vertex/ prefix in vertex/gemini-3.8-flash mean?

vertex/ selects the Vertex sales channel on Router One: a separately priced product whose routing stays inside the Vertex channel and never falls back to the default channel, with posted rates and tiers of its own, plan quota only when the live plan response lists the channel id, and the channel id echoed in the response and in every request trace. Router One publishes the channel label and the customer price, not the suppliers or regions behind it; the channel model ids guide on the blog states the full rules. No Router One subscription plan includes Gemini 3.8 Flash · Vertex today; every call bills the wallet at its posted rate.

Start using Gemini 3.8 Flash · Vertex

Create an API key and call Gemini 3.8 Flash · Vertex at $0.5625 in / $2.8125 out per 1M tokens on Router One — pay as you go, with per-request cost and latency visibility.