Step 3.5 Flash API Pricing

Step 3.5 Flash pricing by provider

1 listing across 1 provider. Token prices are in US dollars per 1M tokens. The highlighted row is the price quoted above.

Other Step 3.5 Flash prices on EmpirioLabs AI

What Step 3.5 Flash costs in practice

1,000 requests with 2,000 input and 500 output tokens each

100 long-document requests with 100,000 input and 2,000 output tokens each

Step 3.5 Flash cost calculator

At EmpirioLabs AI's price ($0.10 input, $0.30 output per 1M tokens), 10,000 requests a day with 1,000 input and 500 output tokens each cost $2.50 a day, about $75.00 a month. Change the numbers for your workload, or compare it with other models.

Step 3.5 Flash features

Input: text. Output: text.

• Function calling
• Reasoning
• Prompt caching
• Web search

Use Step 3.5 Flash with LiteLLM

Call Step 3.5 Flash through the LiteLLM Python SDK, or put it behind the LiteLLM proxy and send OpenAI-format requests to /v1/chat/completions. LiteLLM tracks the cost of every request at these prices.

from litellm import completion

response = completion(
    model="empiriolabs/step-3-5-flash",
    messages=[{"role": "user", "content": "Hello!"}],
)

model_list:
  - model_name: step-3-5-flash
    litellm_params:
      model: empiriolabs/step-3-5-flash
      # credentials: see the provider's LiteLLM docs page

curl http://0.0.0.0:4000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $LITELLM_API_KEY" \
  -d '{
    "model": "step-3-5-flash",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Step 3.5 Flash FAQ

Related models

• Step 3.5 Flash 2603$0.10 / $0.30 per 1M tokens
• Step 3.7 Flash$0.20 / $1.15 per 1M tokens