generated: '2026-07-18'
method: searched
source: https://docs.bytez.com/model-api/docs/billing
signal:
  status_code: 429
  error_message: Rate limit exceeded
  header_based: false
  notes: >-
    Limits are enforced by tier/credits rather than published response headers.
    A 429 with envelope error "Rate limit exceeded" signals throttling.
tiers:
- name: Free
  price: $0/month ($1 free credits, refresh every 4 weeks)
  open_model_concurrency: 1
  open_model_max_params: 7B
  closed_model_rate: 10 requests/second
- name: Pay-as-you-go
  price: $3/month ($5 credits)
  open_model_max_params: 120B
  closed_model_rate: unlimited
  notes: Concurrency and open-model size unlock scale with credits purchased in the last 4 weeks ($3+ = 4 concurrent 7B, $10+ = up to 35B).