# Gemini API for Flash, Argon and Pro.

> Use Gemini 3.8 Flash and 3 more Gemini models through one OpenAI-compatible Outrun key. Gemini 3.8 Flash costs $0.32 in / $1.58 out per 1M tokens.

Outrun serves Gemini 3.8 Flash, Gemini 3.7 Flash, Gemini 4 Argon and Gemini 3.1 Pro Preview through one OpenAI-compatible API key. Gemini 3.8 Flash costs $0.32 per 1M input tokens and $1.58 per 1M output tokens. The same key also covers the Gemini image and video and audio models listed below. Outrun does not store your prompts or outputs on any Gemini ID.

[Try Gemini in the Playground](https://outrun.to/playground) [Get your API key](https://t.me/outrunAPI_Bot) [All Gemini prices](https://outrun.to/gemini-api#prices)

$0.10 free API credit for eligible new accounts.

4 model IDs on one Outrun key

Lowest-priced model

[Gemini 3.8 Flash](https://outrun.to/model/gemini-3.8-flash)

`gemini-3.8-flash`

**$0.32** in */* **$1.58** outper 1M tokens

**58%** below Google's list output price *($1.58 vs $3.75)*

Endpoint

/v1/chat/completions

Format

OpenAI-compatible

Gemini IDs

4

Input from

$0.32

Privacy

Zero at Outrun

## Which Gemini model ID should I use?

Start with `gemini-3.8-flash` for the lowest input price in this family. Keep the same key and base URL when you switch IDs. Each model name in the price table opens its own page with prices, capabilities and setup values.

- Lowest cost per input token`gemini-3.8-flash`$0.32 / $1.58
- Gemini 3.7 Flash`gemini-3.7-flash`$0.95 / $4.73
- Gemini 4 Argon`gemini-4-argon`$1.20 / $6.00
- Gemini 3.1 Pro Preview`gemini-3.1-pro-preview`$1.26 / $7.56

## How much does the Gemini API cost on Outrun?

4 Gemini text models are available on Outrun, starting at $0.32 per 1M input tokens. Every ID is billed per token from prepaid USD credit; the table lists every context and cache tier.

| Model | Input | Output | Cached input |
| --- | --- | --- | --- |
| [Gemini 3.8 Flash](https://outrun.to/model/gemini-3.8-flash) `gemini-3.8-flash` | $0.32 | $1.58 | $0.04 |
| [Gemini 3.7 Flash](https://outrun.to/model/gemini-3.7-flash) `gemini-3.7-flash` | $0.95 | $4.73 | $0.10 |
| [Gemini 4 Argon](https://outrun.to/model/gemini-4-argon) `gemini-4-argon` | $1.20 | $6.00 | $0.12 |
| [Gemini 3.1 Pro Preview](https://outrun.to/model/gemini-3.1-pro-preview) `gemini-3.1-pro-preview` up to 200k tokens | $1.26 | $7.56 | $0.13 |
| Gemini 3.1 Pro Preview, over 200k tokens | $2.52 | $11.34 | $0.26 |

Billed rates, rounded up to the cent, updated 2026-10-29. Cached input is part of input, not an extra charge. The [pricing page](https://outrun.to/discounted-ai-api) lists every model.

## How do the prices compare?

Standard-tier output rates against the official list prices the [pricing page](https://outrun.to/discounted-ai-api) cites.

| Model | Outrun | List price | Difference | Source |
| --- | --- | --- | --- | --- |
| [Gemini 3.8 Flash](https://outrun.to/model/gemini-3.8-flash) `gemini-3.8-flash` | $0.32*/*$1.58 | $0.75*/*$3.75 | **58%** lower | [Google](https://ai.google.dev/gemini-api/docs/pricing) |

## What else can I use with the same key?

Image, video and audio models have their own billing units and endpoints. Open a model page for its request format.

| Model | Kind | Rate |
| --- | --- | --- |
| [Nano Banana / Gemini 3.1 Flash Image](https://outrun.to/model/gemini-3.1-flash-image) `gemini-3.1-flash-image` | Image | $0.03 per image |
| [Nano Banana Pro / Gemini 3 Pro Image](https://outrun.to/model/gemini-3-pro-image) `gemini-3-pro-image` | Image | $0.04 per image |
| [Veo 3.1 Fast](https://outrun.to/model/veo-3.1-fast) `veo-3.1-fast` | Video | $0.03 per second |
| [Gemini Omni Flash](https://outrun.to/model/gemini-omni-flash) `gemini-omni-flash` | Video | $0.06 per second |
| [Veo 3.1](https://outrun.to/model/veo-3.1) `veo-3.1` | Video | $0.08 per second |
| [Gemini 3.1 TTS](https://outrun.to/model/gemini-3.1-tts) `gemini-3.1-tts` | Audio | $0.04 per request |
| [Gemini 3.8 Flash TTS](https://outrun.to/model/gemini-3.8-flash-tts) `gemini-3.8-flash-tts` | Audio | $0.32 in / $5.67 out per 1M tokens |
| [Gemini 3 STT](https://outrun.to/model/gemini-3-stt) `gemini-3-stt` | Audio | $0.32 in / $1.89 out per 1M tokens |

## How do I call the Gemini API through Outrun?

Gemini text models on Outrun use the OpenAI Chat Completions format, so the OpenAI SDKs and any OpenAI-compatible app work with your Outrun key and base URL.

1. 01
  ### Get your key
  Open the Telegram bot and copy your personal key. It works for Gemini and every other Outrun model.
2. 02
  ### Set the base URL
  Use `https://api.outrun.to/v1` exactly as shown, without `/chat/completions`.
3. 03
  ### Send a Gemini model ID
  Put the full ID, such as `gemini-3.8-flash`, in the `model` field.

**POST**/v1/chat/completions

```
curl https://api.outrun.to/v1/chat/completions \
  -H "Authorization: Bearer $OUTRUN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gemini-3.8-flash",
    "messages": [
      {"role": "user", "content": "Hello!"}
    ]
  }'
```

Swap the model

Gemini 3.8 Flash **$0.32** in*/* **$1.58** outper 1M tokens [All Gemini prices](https://outrun.to/gemini-api#prices)

Keep your key in an environment variable, never in client-side code.

### Setup guides

- [Gemini CLI setup](https://outrun.to/docs/setup/gemini)
- [OpenCode CLI](https://outrun.to/docs/setup/opencode)
- [API reference](https://outrun.to/docs/api)
- [Model documentation](https://outrun.to/docs/models)

## Does Outrun keep my Gemini prompts?

No. Outrun does not store your prompts, images or outputs on any model, Gemini included. For each request Outrun keeps only a usage record for billing: model, tokens and cost. API calls are never added to chat history.

[How Outrun handles your prompts](https://outrun.to/uncensored-ai-api#privacy)

## Gemini API questions

The [model pages](https://outrun.to/model/) list every Gemini ID with its current rate and setup values.

### Do I need a Google account?

No. One Outrun key and one prepaid USD balance cover Gemini and every other model on Outrun. You get the key from the Telegram bot, and eligible new accounts start with $0.10 in free credit.

### Which Gemini model has the lowest input price?

Gemini 3.8 Flash starts at $0.32 per 1M input tokens and $1.58 per 1M output tokens.

### How do I switch models?

Keep your Outrun key and the API base URL, and change the model ID in your request. Each model page lists its prices and setup values.

### Can I try Gemini for free?

Eligible new accounts start with $0.10 in free API credit. Usage is billed at the rates on this page, and the Playground lets you try any model in your browser.

## Keep exploring

- [Pricing **All 116 prices**](https://outrun.to/discounted-ai-api)
- [Models **Every model page**](https://outrun.to/model/)
- [Guide **Grok API**](https://outrun.to/grok-api)
- [Guide **Kimi API**](https://outrun.to/kimi-api)
- [Guide **GPT API**](https://outrun.to/gpt-api)
- [Playground **Try Gemini in your browser**](https://outrun.to/playground)

---
Source: https://outrun.to/gemini-api
Outrun: https://outrun.to/ | API base: https://api.outrun.to/v1 | Prices (JSON): https://api.outrun.to/pricing | Docs: https://outrun.to/docs/