generated: '2026-07-21'
method: searched
source: >-
  https://platform.stepfun.com/docs/zh/guides/model-migration (dated model
  retirements + replacements), https://platform.stepfun.com/docs/zh/step-plan/upgrade-notice,
  pricing/limits page; status.stepfun.com probed unreachable 2026-07-21.
versioning:
  scheme: uri-path
  current: v1
  notes: >-
    All endpoints are under /v1 (Step Plan under /step_plan/v1). Change is
    managed at the model level (new model IDs such as step-3.5-flash-2603)
    rather than by API version.
deprecation:
  policy_url: https://platform.stepfun.com/docs/zh/guides/model-migration
  sunset_header: false
  notes: >-
    Models are retired on announced dates with recommended replacement model
    IDs. Example: on 2026-07-08 step-1-8k/32k, step-1v-8k/32k, step-2-mini,
    step-2-16k, step-1o-vision-32k (→ step-1o-turbo-vision), step-3
    (→ step-3.7-flash) and step-1x-medium (→ step-2x-large) were retired.
    Migration is a model-field swap; no RFC 8594 Sunset/Deprecation headers
    are documented.
sla:
  url: null
  public_uptime_target: null
status_page: null
notes:
  - No public status page found (status.stepfun.com does not resolve).
  - Free-promo endings are announced with dates on the pricing page (e.g. step-2x-large ended free tier 2026-06-12).
deprecated_models:
  - step-1-8k
  - step-1-32k
  - step-1v-8k
  - step-1v-32k
  - step-2-mini
  - step-2-16k
  - step-1o-vision-32k
  - step-3
  - step-1x-medium