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Stepfun
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stepfun/step-3.5-flash

Open weights
Step 3.5 Flash

StepFun flash lane for quick multimodal reasoning and coding assistance

This model's cache

This model page returns the exact headers below. The page and /api/models/stepfun--step-3.5-flash share the model:stepfun--step-3.5-flash tag, so invalidation stays scoped to this model.

Cache key/models/stepfun--step-3.5-flash
Cache-Controlpublic, max-age=300, stale-while-revalidate=3600
Cache-Tagcatalogmodel:stepfun--step-3.5-flash

Workers Cache derives the key from this path/query, plus the Worker entrypoint and current Worker version.

export const Route = createFileRoute('/models/$modelSlug')({
  headers: () => ({
    'Cache-Control': 'public, max-age=300, stale-while-revalidate=3600',
    'Cache-Tag': 'catalog,model:stepfun--step-3.5-flash',
  }),
})

Invalidate this cache tag

await ctx.cache.purge({ tags: ['model:stepfun--step-3.5-flash'] })

Use this when one model changes and you do not want to evict the whole catalog.

ReasoningTool callingTemperature control
Released
Jan 29, 2026
Last updated
Feb 13, 2026
Context window
256K tokens
Max output
256K tokens
Open weights
Yes
Family

Starts at

$0.09

per 1M input tokens

Output

$0.3

Sellers

6

No cart or checkout in this MVP — pick a provider below and open their docs when you're ready to use it.

Capabilities & modalities
Reasoning
Tool calling
Structured output
Attachments
InputText
OutputText
Provider shelf
Where to get Step 3.5 Flash

Sorted by lowest input price

ProviderInput / 1MOutput / 1MContext

Vercel AI Gateway

stepfun/step-3.5-flash

$0.09$0.3262.1KDocs

ZenMux

stepfun/step-3.5-flash

$0.1$0.3256KDocs

StepFun

step-3.5-flash

$0.1$0.3256KDocs

Kilo Gateway

stepfun/step-3.5-flash

$0.1$0.3256KDocs

OpenRouter

stepfun/step-3.5-flash

$0.1$0.3262.1KDocs

Qiniu

stepfun/step-3.5-flash

QuoteQuote64KDocs
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