Pika H3 Flex
Generate a video with synchronized audio from a text prompt. Choose any whole-second duration from 5 to 15, 480p or 768p resolution, and one of 11 aspect ratios. Optionally rewrite the prompt. 1080p/2k/4k generates at 768p and upscales once with Pika Upsampler V1, preserving audio and frame rate. Combined pricing is per actual output second; the quote reserves the native frame-count duration bound.
Capabilities
Best for
- •Cinematic text-to-video shots
- •Short social and ad clips
- •Consistent multi-shot sequences
- •Look-dev and style exploration
Not for
- •Frame-exact rotoscoping
- •Feature-length renders
- •Pixel-perfect compositing
- •Precise on-screen text
Authentication
api key header
The Pika API uses API keys to authenticate requests. Send your key in the X-API-Key header. Your API key is a secret. Don't expose it in browsers or other client-side code. Instead, call the API from your server. The signed-in playground uses a portal session and never sends your API key.
X-API-Key: YOUR_API_KEY
Endpoint
asynchronous · poll for the result
REST Setup
plain HTTPS
Video generation runs through the REST endpoint shown above. The API is plain JSON over HTTPS, so any HTTP client works. No provider-specific SDK is required.
Generate
POST /v1/media/pika/pika-h3-flex/text-to-video
Request
curl -X POST https://api.dev.pika.art/v1/media/pika/pika-h3-flex/text-to-video \-H "X-API-Key: YOUR_API_KEY" \-H "Content-Type: application/json" \-d '{"prompt": "A large working vegetable farm under a soft overcast sky, pale grey-white cloud with patches of soft blue. Endless parallel rows of raised beds of dark brown tilled soil, clumpy and freshly turned, each lined with tall pale bamboo cane A-frame teepees tied with twine at the top, young leafy green tomato and pepper seedlings at their base, terracotta pots along low weathered grey timber bed edges, a line of green crops on the far flat horizon.\n\nThe video opens with NO person visible. The first four seconds show only rows of plants and bamboo.\n\nShot 1, one continuous camera move:\n0-4s: The camera is low, at waist height, and trucks sideways to the right at high speed, travelling perpendicular to the rows. Row after row after row of bamboo teepees and green plants rushes across the frame from right to left, each row flashing past one after another: canes, plants, gap of soil, canes, plants, gap of soil. Strong motion blur on the foreground canes, the horizon steady. Like a camera car racing along the end of the field.\n4-5s: The camera brakes hard and stops dead, perfectly lined up looking straight down the length of one single row, the row's soil path running to a vanishing point in the centre of frame. A tiny silver figure is just visible far away at the end of the row. A brief still beat.\n5-8s: The camera launches forward and dollies fast and low straight down that row between the bamboo canes, the canes streaming past either side. It decelerates as the figure grows into a woman kneeling in the soil and stops in a medium-wide side-on shot of her: early 30s, pale skin with a few freckles, dark brown hair in a low loose chignon, a calm focused expression, wearing a dramatic Victorian-silhouette ballgown made of crinkled glossy SILVER metallic tarpaulin, with a deep V neckline, enormous puffed short sleeves, a gathered waist and a huge skirt pooled and spread across the soil behind her. She leans forward on one hand over the bed, planting a small seedling with a steel hand trowel with a wooden handle.\n\nHard cut.\n\nShot 2:\n8-12s: Tight close-up at soil level on her hands. She presses dark damp soil firmly around the base of the seedling and pats it down twice, sets the trowel aside, then brushes her palms together to dust them off. Crumbs of soil fall from her fingers. The glossy crinkled silver plastic of her skirt fills the background.\n\nThe silver plastic gown has real stiffness: it crackles, creases and catches soft highlights. Soil is clumpy and leaves dirt on her fingers. Soft diffused overcast light, no hard sun or hard-edged shadows, but rich contrast and dimension. Surreal fashion-editorial tone played straight. Photographic natural colour, subtle film grain. The woman and her gown stay exactly the same; nothing morphs. SPEED IS CRITICAL: everything moves at normal real-time speed, like 24fps footage played back at 24fps - natural motion, NO slow motion.\n\nSound: natural diegetic location sound only — rushing wind and whoosh of canes flashing past, then quiet wind through leaves, the crinkle of the plastic gown, trowel scraping soil, soft pats, dry hands brushing together. No music, no score, no singing, no melody, no rhythm track.","duration": 12,"resolution": "2k","seed": 0,"rewrite": true,"output_mode": "video","channel_mode": "stereo"}'
Response
{"id": "media_8f3a2c91-5b7d-4e0a-9c26-31d4f2a8e6b0","status": "queued"}
Request body
Accepted values
- aspect_ratio
- resolution
- output_mode
- channel_mode
Returns
Returns a job object with status , not the final output. Store the id from the response and poll the job until it completes.
Poll status
GET /v1/media/jobs/{request_id}
Request
curl https://api.dev.pika.art/v1/media/jobs/{request_id} \-H "X-API-Key: YOUR_API_KEY"
Response
{"id": "media_8f3a2c91-5b7d-4e0a-9c26-31d4f2a8e6b0","status": "running"}
Poll the job by id until it reaches a terminal state: completed or failed. A completed job carries its download URL in output, and GET /v1/media/jobs/{request_id}/content returns that same URL as { "url" } for clients that only kept the id.
DELETE /v1/media/jobs/{request_id} erases the stored media for a job, and the request captured at submit (the prompt and parameters). The job then reports deleted_at and no output, and the content endpoint answers 410.
The job object
Errors
shared across calls
Errors use conventional HTTP status codes with a JSON body of the shape {"message": "..."}. Validation failures return 422 with a message naming the offending field. Submit rejections after the job row exists (balance, rate limit) return the failed job envelope — branch on error.code.
| Status | When | Body |
|---|---|---|
| 401 Unauthorized | The API key is missing or invalid. | {"message":"Invalid API key"} |
| 403 Forbidden | An inactive key is rejected with a {"message"} body. A submit that the org balance or postpaid cycle limit cannot cover is rejected after the job row exists and returns the failed job envelope. GET /billing/balance separates the two: a 200 means the key is active, so the rejection was the balance or the cycle limit. | {"id":"media_8f3a2c91-5b7d-4e0a-9c26-31d4f2a8e6b0","status":"failed","error":{"code":"insufficient_balance","message":"Insufficient org balance"}} |
| 404 Not Found | No job with that id exists in your org, or the media path names an unknown vendor/model/function. | {"message":"media job not found"} |
| 409 Conflict | The result was requested before the job completed, or an Idempotency-Key header was reused with a different body. | {"message":"media job is not ready"} |
| 422 Unprocessable Entity | The request body failed validation: an invalid enum value, a missing required field, a wrong type, or malformed JSON. The JSON message names the offending field. A schema-valid parameter combination that cannot be priced instead fails after job creation and returns the failed job envelope with error code invalid_input. | {"message":"duration: Input should be less than or equal to 15"} |
| 429 Too Many Requests | You've hit your per-minute or per-day request limit, or your org's job queue is full. Returned as the failed job envelope. If there's a Retry-After header, wait that long, then retry with a fresh Idempotency-Key. | {"id":"media_8f3a2c91-5b7d-4e0a-9c26-31d4f2a8e6b0","status":"failed","error":{"code":"rate_limited","message":"rate limit exceeded: rpm"}} |
| 503 Service Unavailable | The model rail or a backend dependency is temporarily unavailable. Returned as the failed job envelope; retry with backoff and a fresh Idempotency-Key. | {"id":"media_8f3a2c91-5b7d-4e0a-9c26-31d4f2a8e6b0","status":"failed","error":{"code":"provider_unavailable","message":"media dispatch unavailable"}} |