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StepFun: Step 3.5 Flash | limit and speed probe

StepFun: Step 3.5 Flash limit probing should cover RPM, TPM, concurrency, max output, first-token latency, and occasional 429/5xx risk.

Provider
StepFun AI
1 models in catalog
Context
262,144
China route
Input price
$0.100
USD / 1M tokens
Output price
$0.300
USD / 1M tokens
Key route summary
Model ID
stepfun/step-3.5-flash
Provider
StepFun AI
Check dimension
limit-probe
Read-only check. Detection data burns after 5 minutes.
The result shows observed facts only and never stores the full key.

Confirm identity and visibility first

Use shape, Base URL, model list, and lightweight chat probe together. Compatible OpenAI protocol alone is not identity.

  • Model ID: stepfun/step-3.5-flash
  • Provider: StepFun AI
  • Check dimension: limit and speed probe

Then split capability and limits

The result shows observed facts only and never stores the full key.

  • Parameter surface: supports frequency_penalty
  • Parameter surface: supports include_reasoning
  • Parameter surface: supports max_tokens
  • Parameter surface: supports min_p
  • Parameter surface: supports presence_penalty
  • Context: 262,144
  • Input price: $0.100 · Output price: $0.300

Finish with operator action

Do not end at success or failure. Return the next action: fill price, add metadata, change route, monitor balance, or do not list yet.

  • Read-only check. Detection data burns after 5 minutes.
  • China route
  • limit-probe