Stepfun API Pricing
3 paid models · Price range: $0.10 - $0.20 /1M
About Stepfun
Stepfun provides AI models through their API. Compare pricing and find the best model for your needs.
Pricing Features
- Pay-per-token billing
- Prompt Caching (discounted)
📊 Stepfun Model Comparison
Compare all models side by side. Sorted by total price (input + output).
| Model | Tier | Input /1M | Output /1M | Total /1M | Context | Best For |
|---|---|---|---|---|---|---|
| Step 3.5 Flash (free) | Budget | $0.10 | $0.30 | $0.40 | 262k | Complex reasoning, math |
| Step 3.5 Flash (free) | Budget | $0.10 | $0.30 | $0.40 | 262k | Complex reasoning, math |
| Step 3.7 Flash | Flagship | $0.20 | $1.15 | $1.35 | 262k | Complex reasoning, math |
🎯 Which Stepfun Model Should You Choose?
Quick recommendations based on your use case.
💰 Stepfun Monthly Cost Examples
Estimated monthly costs for common use cases.
| Use Case | Monthly Usage | Step 3.5 Flash (free) (Budget) |
|---|---|---|
|
Customer Service Bot
1000 conversations/day
|
500k input 200k output |
$0.11/mo |
|
Code Assistant
200 requests/day
|
1.0M input 500k output |
$0.25/mo |
|
Data Analysis
500 analyses/day
|
2.0M input 300k output |
$0.29/mo |
⚔️ Stepfun vs Competitors
How does {brand} compare to other major AI providers?
| Brand | Model | Input /1M | Output /1M | Total /1M | Context | vs {brand} |
|---|---|---|---|---|---|---|
|
Stepfun
|
Step 3.5 Flash (free) Current | $0.10 | $0.30 | $0.40 | 262k | — |
OpenAI
|
Codex Mini | $1.50 | $6.00 | $7.50 | 200k | 1775% more |
|
OpenAI
|
GPT-5.2 Pro | $21.00 | $168.00 | $189.00 | 400k | 47150% more |
|
OpenAI
|
GPT-5.2 | $1.75 | $14.00 | $15.75 | 400k | 3838% more |
|
OpenAI
|
GPT-5.2 | $1.75 | $14.00 | $15.75 | 400k | 3838% more |
|
OpenAI
|
GPT-5.1-Codex-Max | $1.25 | $10.00 | $11.25 | 400k | 2713% more |
|
OpenAI
|
GPT-5.1-Codex-Max | $1.25 | $10.00 | $11.25 | 400k | 2713% more |
All Models
| Model | Input /1M | Output /1M | Context | Capabilities | Actions | |
|---|---|---|---|---|---|---|
| Step 3.5 Flash (free) Cheapest | $0.10 | $0.30 | 262k | View Details | ||
| Step 3.5 Flash (free) | $0.10 | $0.30 | 262k | View Details | ||
| Step 3.7 Flash | $0.20 | $1.15 | 262k | View Details |
❓ Stepfun Pricing FAQ
What is the cheapest Stepfun model?
The cheapest Stepfun model is Step 3.5 Flash (free) at $0.40 per 1M tokens (input + output combined).
What is the maximum context length for Stepfun models?
Stepfun models support up to 262k context length, allowing you to process large documents and maintain long conversations.
How do I choose between Stepfun models?
For budget projects, choose the cheapest model. For code generation, prioritize low output price. For complex reasoning, choose models with reasoning capability. Use our scenario guide above.
Does Stepfun support prompt caching?
Yes, Stepfun supports prompt caching which can significantly reduce costs for repeated prompts. Check individual model pages for caching prices.