Hi - I answer from the OpenSmartRoute documentation: routing, the API, plans and quotas, self-hosting. Ask away, or open a support ticket if you need a person.
Grounded in the docs - follow a source before acting on it.
Step 3.5 Flash - Model - OpenSmartRoute
Modelv1.0.0
Step 3.5 Flash
Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token....
Reference model card from the OpenRouter listing - model stepfun/step-3.5-flash. Prices are per million tokens as listed; ratings and installs below are from this marketplace.
Step 3.5 Flash
Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token....
Facts
Vendor
StepFun
Context window
262,144 tokens
Max output
65,536 tokens
Input price
$0.10 / 1M tokens
Output price
$0.30 / 1M tokens
Input
text
Output
text
Tool calling
yes
Structured outputs
no
Reasoning
yes
Open weights
stepfun-ai/Step-3.5-Flash
Endpoint: https://openrouter.ai/api/v1 (OpenAI-compatible), model stepfun/step-3.5-flash
Use it
Copy one of these into your project. Installing also returns the manifest and these snippets.
# after Install: the listing is in your workspace's routing pool - nothing else to configure
curl -s -X POST https://api.opensmartroute.ai/api/v1/route -H 'Authorization: Bearer $OSR_API_KEY' -H 'Content-Type: application/json' -d '{"text": "...", "plan": true}'
# or pin it on the OpenAI-compatible endpoint: {"model": "model-stepfun-step-3-5-flash", ...}
Manifest
An Open Capability Manifest: the router reads it to know what this does, what it costs and when to pick it.
model-stepfun-step-3-5-flash.ocm.jsonjson
{
"ocm": "1",
"id": "model-stepfun-step-3-5-flash",
"kind": "llm",
"name": "Step 3.5 Flash",
"description": "Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token....",
"publisher": "StepFun",
"version": "1.0.0",
"capabilities": {
"domains": [
"general"
],
"tags": [
"llm",
"stepfun",
"openrouter",
"open-weights",
"reasoning",
"tool-calling",
"models"
],
"languages": [
"en"
],
"modalities": [
"text"
],
"supports_tools": true,
"supports_streaming": true,
"context_window": 262144
},
"quality_prior": 0.6,
"examples": [
"Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token...."
],
"primary": false,
"metadata": {
"source": {
"provider": "models",
"ref": "1769728337",
"url": "https://openrouter.ai/stepfun/step-3.5-flash",
"key": "stepfun/step-3.5-flash",
"catalogue": "https://openrouter.ai/api/v1"
},
"model": "stepfun/step-3.5-flash",
"pricing": {
"input_usd_per_1m": 0.1,
"output_usd_per_1m": 0.3
},
"max_output_tokens": 65536,
"output_modalities": [
"text"
],
"hugging_face_id": "stepfun-ai/Step-3.5-Flash",
"reasoning": true,
"created": 1769728337,
"benchmarks": {
"hub_downloads": 105596,
"hub_downloads_total": 1562404,
"hub_likes": 836,
"hub_trending": 2
}
},
"cost": {
"usd_per_1k_tokens": 0.0002
},
"endpoints": [
{
"protocol": "openai",
"url": "https://openrouter.ai/api/v1"
}
]
}
Fetch it by URL: GET /api/v1/registry/model-stepfun-step-3-5-flash/manifest?version=1.0.0
Reviews
Star ratings from people who tried it. One review per account; edit yours any time.
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