85% offStepFun: Step 5 Preview API
StepFun·Vision
Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters). It performs strongly in software engineering and professional...
Pricing
Cheapest live price, per 1 million tokens.
Input / 1M tokens
$1.00 OpenRouter
Output / 1M tokens
$2.70 OpenRouter
Capabilities · 8
Specifications
- Context window
- 1M
- Max output
- 64K
- Type
- Vision
- Creator
- StepFun
- Live sellers
- 1
- Requests / 24h
- 4
Estimated monthly cost
30 days at the cheapest live price.
Quick start
OpenAI-compatible — change the base URL and key. Get a key from the dashboard.
from openai import OpenAI
client = OpenAI(
base_url="https://api.qubax.ai/v1",
api_key="YOUR_QUBAX_API_KEY",
)
response = client.chat.completions.create(
model="step-5-preview",
messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)About StepFun: Step 5 Preview
StepFun: Step 5 Preview is a multimodal language model developed by StepFun. It's particularly well-suited for analyzing images, screenshots, and visual content, tackling complex, multi-step reasoning problems, orchestrating tool-using agents that call APIs and external services, producing structured outputs for reliable data extraction and handling large contexts of up to 1M tokens. Its 1M-token context window means you can pass in entire documents, codebases, or conversation histories without losing context. It can write up to 64K tokens in a single response.
As of Nov 13, 2026, StepFun: Step 5 Preview costs $0.150 per 1M input tokens and $0.405 per 1M output tokens on Qubax, versus $1.00 / $2.70 on OpenRouter (85% less on input). A typical 1,000 chat requests (2K tokens in, 500 out) come to about $0.50. Pay with USDC, USDT, BTC, ETH or 350+ other coins — no credit card required.
Similar-priced alternatives
Frequently asked questions
How much does the StepFun: Step 5 Preview API cost?
On Qubax, StepFun: Step 5 Preview costs $0.150 per 1M input tokens and $0.405 per 1M output tokens. This is 85% cheaper than OpenRouter's price of $1.00 per 1M input tokens.
Is the StepFun: Step 5 Preview API compatible with OpenAI?
Yes. Qubax provides an OpenAI-compatible API. You can use StepFun: Step 5 Preview as a drop-in replacement by changing your base URL to https://api.qubax.ai/v1 and using your Qubax API key. It works with Cline, Cursor, OpenCode, Hermes Agent, and any tool that supports OpenAI APIs.
Why is StepFun: Step 5 Preview cheaper on Qubax than OpenRouter?
Qubax sources AI inference from an open compute marketplace on the Base blockchain where GPU providers compete on price. We pass the savings to you — 85% cheaper than OpenRouter's price for StepFun: Step 5 Preview.
How do I pay for StepFun: Step 5 Preview API usage?
Qubax uses prepaid crypto credits. Top up with USDC, USDT, BTC, ETH, SOL or 350+ other coins and your balance is deducted as you use the API. No credit card or KYC required.
What is the context window of StepFun: Step 5 Preview?
StepFun: Step 5 Preview supports a context window of 1M tokens, allowing you to process large documents, codebases, or long conversations in a single request.
What can I build with StepFun: Step 5 Preview?
You can use StepFun: Step 5 Preview to analyze images and visual content, tackle complex multi-step reasoning tasks, build autonomous agents that call external tools and APIs, generate structured JSON output for data pipelines and process long documents and entire codebases. Because it's served through Qubax's OpenAI-compatible API, integration into existing apps, agents, or workflows takes just a few lines of code.
How fast and reliable is StepFun: Step 5 Preview on Qubax?
Responses stream token by token. Latency depends on the provider and prompt length.
StepFun: Step 5 Preview vs NVIDIA Nemotron 3 Ultra 550B: which should I choose?
StepFun: Step 5 Preview by StepFun and NVIDIA Nemotron 3 Ultra 550B by NVIDIA are both strong models in a similar price tier. StepFun: Step 5 Preview excels at complex reasoning and supports vision/image inputs. NVIDIA Nemotron 3 Ultra 550B comes from a different lab and may have different strengths depending on your workload. On Qubax, StepFun: Step 5 Preview starts at $0.150/1M input tokens while NVIDIA Nemotron 3 Ultra 550B comes in at $0.113/1M, so NVIDIA Nemotron 3 Ultra 550B may be worth considering if you need to minimize per-token cost. Both are available on Qubax with crypto payments and OpenAI-compatible APIs, so you can try each and switch freely.
Can I use StepFun: Step 5 Preview for commercial projects?
Yes. StepFun: Step 5 Preview on Qubax can be used for commercial purposes. You own the outputs you generate. Qubax provides the API infrastructure — you bring your use case.
Why use StepFun: Step 5 Preview on Qubax?
85% cheaper
Providers compete on price — you get the cheapest healthy seller.
Pay with crypto
350+ coins (BTC, ETH, SOL, USDT, USDC). No card, no KYC.
OpenAI & Anthropic compatible
Drop-in base URL. Works with Cline, Cursor, Claude Code, OpenAI and Anthropic SDKs.