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Chat with StepFun: Step 3.7 Flash

Commercial use OK 380+ models No watermark No sign-up needed
Model:
+ GPT-5, Claude, Gemini
Chat model Premium 256000 ctx
StepFun: Step 3.7 Flash — StepFun: Step 3.7 Flash is an AI model by Stepfun on Free.ai. It supports up to 256,000 tokens of context. Costs approximately 500 tokens per message. Try StepFun: Step 3.7 Flash instantly — no sign up needed. Compare it side-by-side with …
~500 tokens/message

What is StepFun: Step 3.7 Flash?

StepFun: Step 3.7 Flash is an AI model by Stepfun on Free.ai. It supports up to 256,000 tokens of context. Costs approximately 500 tokens per message. Try StepFun: Step 3.7 Flash instantly — no sign up needed. Compare it side-by-side with other models.

Why use StepFun: Step 3.7 Flash for chat?

Streaming responses

Replies stream token-by-token within ~1 second of pressing Send. No idle waiting.

Saved history

Signed-in users see every chat in /account/?tab=history with one-click share links.

Compare side by side

Send the same prompt to two models at /chat/compare/ and judge the outputs side by side.

Commercial use OK

Outputs are yours. Use them in apps, ads, docs, or anything else without attribution.

Sample prompts

Explain the difference between TCP and UDP in one paragraph
Write a friendly out-of-office reply that mentions a return date
Summarize the plot of The Three-Body Problem in 5 bullet points
Suggest 5 unique gift ideas for a friend who loves baking
Help me brainstorm a name for a small landscaping business in Texas

Pricing

Premium chat. Cost is per message — typically ~500 tokens. $1 buys 750,000 tokens, so even paid models cost cents per chat. Signed-up users get 30,000 free tokens/day.

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Full model reference → · See all chat models → · Compare 2 chat models side-by-side →

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StepFun: Step 3.7 Flash is an AI model by Stepfun on Free.ai. It supports up to 256,000 tokens of context. Costs approximately 500 tokens per message. Try ...

How to Use Chat with StepFun: Step 3.7 Flash

1
Enter your input

Type text, upload a file, or describe what you want. No account needed.

2
Click generate

Our AI processes your request in seconds using the best open-source models.

3
Download & share

Download, copy, or share your result. Free for personal and commercial use.

Use this tool via API

Automate this tool from your own code. OpenAI-compatible REST endpoint, Bearer-token auth, no extra SDK required. Token costs match the web interface.

API Documentation Get API Key 
curl -X POST https://api.free.ai/v1/chat/ \
  -H "Authorization: Bearer sk-free-..." \
  -H "Content-Type: application/json" \
  -d '{"model": "qwen7b", "messages": [{"role": "user", "content": "Hello"}]}'

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Chat with StepFun: Step 3.7 Flash — FAQ

StepFun: Step 3.7 Flash is an AI model by Stepfun on Free.ai. It supports up to 256,000 tokens of context. Costs approximately 500 tokens per message. Try StepFun: Step 3.7 Flash instantly — no sign up needed. Compare it side-by-side with other models.

StepFun: Step 3.7 Flash works well for general conversation, writing assistance, brainstorming, code help, and analysis. Try the sample prompts above to see its style.

About 500 tokens per average message. $1 buys 750,000 tokens, so even paid models cost cents per chat. Free accounts get a 30,000-token daily pool.

It depends on the task. /chat/compare/ lets you send the same prompt to StepFun: Step 3.7 Flash and any other model side-by-side — comparison is the fastest way to decide.

Yes. Outputs are yours — Free.ai does not claim rights to anything you generate.

256,000 tokens.

Replies stream token-by-token within ~1 second. Total response time depends on length and model size — small models stream faster, frontier models trade speed for depth.

Yes. Signed-in users see every chat in /account/?tab=history. You can also share a one-link copy of any conversation via the Share button.

Free.ai does not train models on your conversations. Self-hosted models stay on our GPUs. Premium models route to the upstream provider for inference.

Yes. POST to /v1/chat/ with model="stepfun/step-3.7-flash" and a messages array. Streaming SSE is supported. Full reference: /api/.

StepFun: Step 3.7 Flash is a premium model served by an external provider, so self-hosting is not available. Free.ai exposes it through token-based pricing.

Free accounts get a 30,000-token daily pool. When that runs out, top up starting at $1 (750K tokens) — no subscription required.

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How would you rate this tool?

4.1/5 from 12 ratings

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