specification: API Commons Rate Limits
specificationVersion: '0.1'
schema: https://raw.githubusercontent.com/api-evangelist/interface-research/main/schema/api-commons.yml#/$defs/RateLimits
provider: fal
providerId: fal-ai
created: '2026-05-25'
modified: '2026-05-25'
reconciled: true
tags:
  - AI
  - Rate Limiting
  - Concurrency
  - Quota
description: Reconciled rate limits for fal Model APIs. fal primarily uses per-account concurrency limits (number
  of concurrently running requests per model class) rather than RPM throttling. Enterprise contracts can lift these
  limits or reserve capacity.
sources:
  - https://fal.ai/docs
  - https://fal.ai/pricing
  - https://status.fal.ai
algorithm: concurrency
headers:
  remaining: x-fal-concurrency-remaining
  limit: x-fal-concurrency-limit
responseCodes:
  throttled: 429
  paymentRequired: 402
  quotaExceeded: 429
limits:
  - tier: Pay-as-you-go (default)
    surface: Model APIs - Image
    concurrency: 4
    note: Number of simultaneous in-flight image generation requests per account. Upgrade via the dashboard.
  - tier: Pay-as-you-go (default)
    surface: Model APIs - Video
    concurrency: 2
    note: Concurrent video generation jobs per account; video jobs hold GPU for many seconds.
  - tier: Pay-as-you-go (default)
    surface: Model APIs - Audio
    concurrency: 4
    note: Concurrent audio synthesis jobs per account.
  - tier: Pay-as-you-go (default)
    surface: Realtime WebSocket
    concurrency: 1
    note: One realtime session per key on default tier.
  - tier: Enterprise
    surface: All Model APIs
    concurrency: negotiated
    note: Reserved capacity and lifted concurrency per contract.
quotas:
  - dimension: storage
    surface: fal CDN (v3.fal.media)
    limit: per-account, generous default; signed upload URLs expire shortly after issue.
  - dimension: file size
    surface: fal Storage API upload
    limit: see dashboard
notes:
  - 429 indicates concurrency exhaustion. Clients should back off and retry; the queue API itself is the preferred
    pattern because it eliminates client-side rate limiting concerns by accepting jobs and reporting completion.
  - 402 indicates the account has insufficient credits.