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StepFun: Step 3.5 Flash

stepfun/step-3.5-flash

Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token....

Try in playgroundGet API key

Supported APIs

Chat API
Context
262K
Max output
—
Input / 1M
₹9.06
Cached / 1M
₹0.91
Output / 1M
₹30.20

Pricing

Token typeUSD / 1MINR / 1M
Input$0.090₹9.06
Cached inputprompt cache read$0.0090₹0.91
Output$0.300₹30.20

INR prices include forex conversion. Billed per token in your wallet. See the cost calculator.

Quickstart

Call StepFun: Step 3.5 Flash through the supported APIs shown above — just set the base URL and your AICredits key.

cURL — /v1/chat/completions
curl https://api.aicredits.in/v1/chat/completions \
  -H "Authorization: Bearer $AICREDITS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "stepfun/step-3.5-flash",
    "messages": [{ "role": "user", "content": "Hello!" }]
  }'

New here? Follow the quickstart guide or browse all models.