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Step 5 Preview

StepFunOpen weights1.05M contextVisionReasoningTool calling

LMArena score 1440 · #75 overall · #57 in coding (2026-10-13)

As of Oct 15, 2026, Step 5 Preview costs $1.00 per million input tokens and $2.70 per million output tokens from Novita AI. The cheapest of 3 sellers is Novita AI at $1.00 / $2.70.

Lowest price, from DeepInfra

Pricing page

Per million tokens

Input
$1.00
Output
$2.70
Cached input
$0.05
Batch input / output
—
  • Up to 1M output tokens per request.

Estimate your monthly cost

Est. per month = input tokens × input price + output tokens × output price. Prices are per million tokens, so 10M input tokens at $3.00 cost $30. ¹ The price is higher for long prompts (usually over 200K tokens); the estimate uses the base price.

From DeepInfra: $15.40 a month.

Where to buy it (3)

Sorted by your monthly estimate. Prices per million tokens.

  • DeepInfra

    Input / output
    $1.00 / $2.70
    Context
    1.05M
    Per month
    $15.40

    stepfun-ai/Step-5-Preview

  • Novita AI

    Input / output
    $1.00 / $2.70
    Context
    1M
    Per month
    $15.40

    stepfun/step-5-preview

  • OpenRouter

    Input / output
    $1.00 / $2.70
    Context
    1.05M
    Per month
    $15.40

    stepfun/step-5-preview

Cloud and hosted sellers may add regional pricing, minimums or platform fees. Supports: Vision, Reasoning, Tool calling.

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