StepFun (阶跃星辰)Proprietary·256K context·— params

Step 3.7 Flashstepfun/step-3-7-flash

Name: Step 3.7 Flash API
Brand: StepFun (阶跃星辰)
Availability: InStock

Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a vision encoder for native image and video understanding, activating roughly 11B parameters...

Cheapest blended:$0.44 / 1M tokenson StepFun · 1 provider listed

Pricing across providers

Sort by:

Provider	Input /1M	Output /1M	Blended /1M	Latency p50	Format	Freshness	Action
StepFun step-3.7-flash	$0.20	$1.15	$0.44	—	OpenAI-compatible	Price 1mo ago	Try →

Affiliate disclosure: We may earn a commission from qualified signups. Pricing independence is enforced at the data layer — see our Editorial Independence Policy.

Works with

Point any of these clients at a hosting's base URL — they all speak at least one of this model's endpoint protocols (OPENAI_COMPATIBLE).

Capabilities

Code samples

Example using StepFun — the cheapest hosting for this model as of last verification. Swap base_url and model to use a different provider from the matrix above.

from openai import OpenAI

client = OpenAI(
    api_key="YOUR_API_KEY",
    base_url="https://api.stepfun.com/v1",
)

response = client.chat.completions.create(
    model="step-3.7-flash",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)

Technical specs

Context: 256K
Max output: 256K
Parameters: —
Release: —
Training cutoff: —
License: —

Similar models

Compare with

Step 3.7 Flash vs GLM 4.5V
Comparison planned — not yet published
Step 3.7 Flash vs GLM 4.6V
Comparison planned — not yet published
Step 3.7 Flash vs GLM 5V Turbo
Comparison planned — not yet published

Frequently asked

How much does Step 3.7 Flash cost?+

The cheapest public hosting is $0.44 per 1M blended tokens on StepFun. 1 total providers are listed above with per-input / per-output / cached pricing.

Is Step 3.7 Flash open-source?+

No. Step 3.7 Flash is a proprietary model from StepFun (阶跃星辰). Access is only via API; weights are not published.

Is Step 3.7 Flash OpenAI-compatible?+

Most listed hostings expose an OpenAI-compatible API, so you can point an existing openai SDK client at the Provider's base_url and use the Provider's model name. See the Code Samples above for a copy-pasteable example.

What's the maximum context window for Step 3.7 Flash?+

The model supports up to 256,000 tokens of context (input + output). Some hosted versions may impose a smaller limit — check the "Context" column in the pricing matrix for each provider.