Step 3.5 Flash API

Fast, inexpensive StepFun model for everyday chat, summarization, and high-throughput workloads.

Provider: StepFun AI | Model ID: step-3-5-flash | Context Window: 131K tokens

Token Pricing

₹10/1M input · ₹50/1M output. Pay-as-you-go micro-metered token billing. UPI and cards accepted with zero minimum commitment.

Token TypePrice (INR)
Input Tokens₹10/1M tokens
Output Tokens₹50/1M tokens
Prompt Caching Input₹10/1M tokens

OpenAI-Compatible Integration

Directly drop into existing OpenAI SDK code by updating the base URL to https://api.luminoai.co.in/v1.

curl https://api.luminoai.co.in/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $LUMINO_API_KEY" \
  -d '{
    "model": "step-3-5-flash",
    "messages": [
      {"role": "system", "content": "You are a helpful assistant."},
      {"role": "user", "content": "Explain KV cache in 2 sentences."}
    ]
  }'

Model Specifications

Model Identifierstep-3-5-flash
ProviderStepFun AI
Categorychat
Context Window131K tokens
API ProtocolOpenAI-compatible REST API (JSON)
Endpointhttps://api.luminoai.co.in/v1/chat/completions

Explore all models in catalog | API Documentation | Test Step 3.5 Flash in Playground