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AnyRouter

Step 5 Preview

Free
Also accepted:stepfun-ai/step-5-preview

Step 5 Preview is StepFun's next-generation flagship base model designed for real-world tasks, with a focus on programming and professional expertise. A multimodal (text, image, video in / text out) base model with a 1M-token context and adjustable reasoning effort.

Input / 1M
$1.08
Output / 1M
$3.09
token context
1M
Vision
text + image + video → text
Upstreams
2
Released
2026-09-20
Try in playgroundCompare

Upstreams and pricing

UpstreamInputOutputNotesProvider details
Credits · billed by AnyRouter
Kilo CodeFree
kilo
$0$0
Your own key · billed by your provider · AnyRouter fee $0
AIHubMixUnavailable
aihubmix-byok
$0$0
Free pool · donated keys · not available for this model — donate a key

Code

POST /api/v1/chat/completions
import osfrom openai import OpenAI client = OpenAI(    api_key=os.environ["ANYROUTER_API_KEY"],    base_url="https://anyrouter.dev/api/v1",) resp = client.chat.completions.create(    model="stepfun/step-5-preview",    messages=[{"role": "user", "content": "Say hi in 3 words."}],)print(resp.choices[0].message.content)
Set ANYROUTER_API_KEY · edits on the demo update this code
All languages, keys and routing
POST /api/v1/chat/completions
{
  "model": "stepfun/step-5-preview",
  "messages": [
    {
      "role": "user",
      "content": "Say hi in 3 words."
    }
  ]
}

Change sort, ZDR, effort, or pin a provider to add routing params.

Set ANYROUTER_API_KEY — click a key to copy it.
Run it live

Attach an image, ask about it, and run it on this model.

Performance and health

Uptime + latency

—recent checks · all routes

No health checks recorded for this model yet.

24h
No traffic in the last 24h.
Usage analytics

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Uptime & Health
No uptime data yet

These providers haven't been health-probed for this model yet. The router still routes around upstreams that fail live requests — uptime fills in once probe history accrues.

Specs, parameters and endpoints
Text generation
Context length1,000,000 tokens
Max output64,000 tokens
Reasoning effortreasoning_effort
"low""medium""high"

Default "medium"

ArchitectureTransformer
Categorytext
ReleasedSep 20, 2026
Modalities
→
Capabilities

params: max_tokens · temperature · top_p · tools · tool_choice · response_format · reasoning · include_reasoning

Your access and resources
Credits
Your own key · AnyRouter fee $0

Run Step 5 Preview on your own key — your requests are billed by the provider. Pool callers pay AnyRouter credits.

No BYOK keys configured for this model yet.

Share a key with the pool to earn credits for every request it serves, covering your plan cost.

Free poolnot in pool yetDonate key →
Create API key for this model
Share cards
Step 5 Preview share card
Step 5 Preview
AIHubMix upstream share card
AIHubMix upstream
Kilo Code upstream share card
Kilo Code upstream
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