Meldport
StepFunactive

Step 5 Preview

meldport/step-5-preview

Step 5 Preview is available through Meldport as step-5-preview. Published capabilities: Text, Vision, Cache, Stream, Tools.

Get API access

MODEL OVERVIEW

About StepFun Step 5 Preview

Step 5 Preview is available through Meldport as step-5-preview. Published capabilities: Text, Vision, Cache, Stream, Tools.

Use the published model ID in requests to Meldport's API. Check the current pricing, context window, and supported capabilities on this page before sending production traffic. See the quickstart for a request example.

GOOD FIT FOR

  • Text generation, extraction, and automation
  • Image-aware prompts and visual analysis
  • Tool calling and agent workflows

BEFORE YOU SHIP

  • Check capabilities, context limit, and price against your workload.
  • Test tool call parsing and error handling before production.
  • Verify image input size and format limits for your use case.

TECHNICAL SPECIFICATIONS

What this model supports

Model IDmeldport/step-5-preview
PublisherStepFun
CapabilitiesText, Vision, Cache, Tools
Context window1M
Lifecycleactive
VerifiedNov 1, 2026

CURRENT RATES

Pricing

MetricRateUnit
Input$0.5per million tokens
Output$1.35per million tokens
Provider-reported cached input$0.05per million tokens
Minimum charge$0.00001per request

Provider-reported cached input tokens use the displayed rate. Every request is recorded in the wallet ledger.

QUICKSTART

Call this model

The same endpoint works from any language.

Send POST /v1/chat/completions with an API key that has inference:invoke. Use meldport/step-5-preview in the model field. Supply your conversation in messages and set stream: true for streamed output. The published context limit is 1M tokens.

This model publishes tool calling. Send function definitions in tools and return tool results in the conversation. Vision inputs are listed for this model. Request fields and output limits · Streaming format · Errors and retry rules

curl https://api.meldport.com/v1/chat/completions \
  -H "Authorization: Bearer $MELDPORT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "meldport/step-5-preview",
    "messages": [{"role": "user", "content": "Hello"}]
  }'

COMMON QUESTIONS

Frequently asked questions

What is the API model ID for Step 5 Preview?

Use meldport/step-5-preview in the model field of your API request.

Which capabilities does Step 5 Preview support?

This model currently publishes Text, Vision, Cache, Tools support through Meldport.

How is Step 5 Preview priced?

Requests are billed per token. Input costs $0.5 per million tokens and output costs $1.35 per million tokens. Provider-reported cached input tokens cost $0.05 per million tokens; Meldport response caching is bypassed. A minimum charge of $0.00001 applies per request. Charges are deducted from your wallet balance in real time.

Which endpoint runs Step 5 Preview?

Send a request to POST https://api.meldport.com/v1/chat/completions with your Meldport API key and use meldport/step-5-preview in the model field.

What context window does Step 5 Preview support?

The published context limit is 1M tokens.