Step 3.5 Flash API
Step 3.5 Flash by StepFun through the RelaySwitch API: $0.40 per million input tokens, $1.20 per million output tokens. Pay by card or crypto (Card, USDT, USDC, BTC, ETH, SOL). No KYC.
Specs
- Model id
step-3.5-flash- Developer
- StepFun
- Context window
- not published
- Max output
- not published
- Input
- text
Call it
curl https://api.relayswitch.io/v1/chat/completions \ -H "Authorization: Bearer $RELAYSWITCH_KEY" \ -H "Content-Type: application/json" \ -d '{ "model": "step-3.5-flash", "messages": [{"role": "user", "content": "Hello"}] }'Any OpenAI SDK works: set the base URL to https://api.relayswitch.io/v1 and the model to step-3.5-flash. Get a key or read the docs.
Step 3.5 Flash API key and pricing
One key covers Step 3.5 Flash and every other model in the catalog. Open the console with an email address, top up from $10 by card or in USDT, USDC, BTC, ETH, SOL, create a key, and send step-3.5-flash as the model. No identity check, no subscription; the balance moves only when you call.
Costs at the live rates above; input and output billed separately, per token, from the prepaid balance.
Step 3.5 Flash: questions
Payment, keys and billing in short.
Run Step 3.5 Flash today
Top up by card or crypto and send "step-3.5-flash".