# Korpi API

> AI video and image API prices up to 85% below official list prices: Grok Imagine $0.0099 per second, Nano Banana $0.0275 per image. Cheaper infrastructure makes these savings possible. Every top AI video, image and text model on one API, one key and one prepaid USD balance.

Base URL: https://backend.korpi.ai/v1
Auth: `Authorization: Bearer <KORPI_API_KEY>` (create a key at https://api.korpi.ai/dashboard)

## Models

- [Grok Imagine API](https://api.korpi.ai/models/grok-imagine): $0.0099 per second (85% below xAI's $0.07 list price). Video, model id `grok-imagine`. Text-to-video and image-to-video at 720p, billed per second of finished video.
- [Nano Banana API](https://api.korpi.ai/models/nano-banana): $0.0275 per image (58% below Google's $0.067 list price). Image, model id `nano-banana`. Text-to-image and reference-based editing at a flat price per image.
- Text models: `gemini-3.8-flash`, `claude-opus-5.5`, `claude-sonnet-5`, `gemini-3.6-flash`, `gemini-3.1-pro-preview`, `grok-4.6`, `grok-4.5`, `grok-4.3`, `kimi-k3`, `deepseek-v4.1-flash`. Chat completions format via POST /chat/completions, max_tokens up to 4096. Billed by input and output tokens, with a separate price for each model:
- gemini-3.8-flash: $0.825 in · $4.125 out / 1M
- claude-opus-5.5: $4.40 in · $22.00 out / 1M
- claude-sonnet-5: $2.20 in · $11.00 out / 1M
- gemini-3.6-flash: $0.825 in · $4.125 out / 1M
- gemini-3.1-pro-preview: $2.20 in · $13.20 out / 1M
- grok-4.6: $2.20 in · $6.60 out / 1M
- grok-4.5: $2.20 in · $6.60 out / 1M
- grok-4.3: $1.375 in · $2.75 out / 1M
- kimi-k3: $3.30 in · $16.50 out / 1M
- deepseek-v4.1-flash: $0.33 in · $1.32 out / 1M

## Endpoints

- POST /videos/generations: `model`, `prompt`, `duration` (6, 8 or 10), `aspect_ratio` (16:9, 9:16, 1:1), optional `image_url`. Returns 202 with an id.
- GET /videos/generations/{id}: poll until `status` is `completed` or `failed`, then download `url`.
- POST /images/generations: `model`, `prompt`, `aspect_ratio` (1:1, 9:16, 16:9, 4:3, 3:4), optional `image_urls` (up to 4). Returns `data[].url`.
- POST /chat/completions: `model`, `messages`, `max_tokens`.
- GET /models: supported model ids.

## Docs

- [Get started](https://api.korpi.ai/get-started)
- [Pricing](https://api.korpi.ai/pricing)
- [Models](https://api.korpi.ai/models)

## Comparisons (public list prices checked 2026-10-14)

- [Korpi API vs fal](https://api.korpi.ai/compare/korpi-vs-fal): Grok Imagine and Nano Banana on Korpi cost up to 85% less than fal's public list prices, with each source linked. One key also covers 10 text models.
- [Korpi API vs Replicate](https://api.korpi.ai/compare/korpi-vs-replicate): Grok Imagine and Nano Banana on Korpi cost up to 80% less than Replicate's public list prices, with each source linked. One key also covers 10 text models.
- [Korpi API vs xAI for Grok Imagine](https://api.korpi.ai/compare/korpi-vs-xai-api): Grok Imagine on Korpi costs 85% less than xAI's public 720p list price, with the source linked. The same key also covers Nano Banana and 10 text models.