Higgsfield API vs Replicate video models

Higgsfield API

One asynchronous API for 67 video and 17 image catalogue entries, with idempotency keys, per-second list prices public without a login, and failed or moderated jobs not charged. API inputs and outputs train Higgsfield's models unless the workspace opts out, and the docs carry no changelog. The API returns 400 at the concurrency limit, with no Retry-After.

Replicate video models

One bearer token reaches more than twenty official video models at published per-second prices, each with a typed input schema, and failed runs aren't charged. Tokens have no scopes or spend cap, no SLA is published, and the terms let Replicate withdraw any model without notice.

Higgsfield API

1. Send Authorization: Key <key_id>:<key_secret> to https://api.higgsfield.ai. A Bearer token is rejected
2. Send a fresh Idempotency-Key with every generation. After a timeout or 5xx, repeat the same request with the same key, then read status_url
3. Treat a 400 whose detail mentions concurrent requests as a limit, not a bad request. Wait for a running job to finish before submitting more
4. Poll status_url from 2 seconds up to 10 with jitter, and stop on completed, failed, nsfw or canceled
5. Download output within seven days. Media files may be deleted after that
6. Read the model's own docs page for its schema. The OpenAPI file lists only a few models

Replicate video models

1. Call official models at POST /v1/models/{owner}/{name}/predictions with no version, then poll GET /v1/predictions/{id} or pass webhook. Video jobs usually outlast the 60-second Prefer: wait window
2. Download the output file within the hour. API predictions lose inputs, outputs and logs after 60 minutes
3. Read the model's price tiers before setting resolution, mode or generate_audio. Kling 3.0 runs from $0.168 to $0.42 a second and Veo 3.1 doubles with audio
4. Send Cancel-After on every create. There is no idempotency key, so a blind retry is a second paid video
5. Keep credit above $20 or enable auto-reload. Low balances are throttled, and granted credit with no card is held to 6 requests a minute