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openai/gpt-5.5-instant

GPT-5.5 Instant

Compact GPT model for low-latency assistance and high-volume workloads

This model's cache

This model page returns the exact headers below. The page and /api/models/openai--gpt-5.5-instant share the model:openai--gpt-5.5-instant tag, so invalidation stays scoped to this model.

Cache key/models/openai--gpt-5.5-instant
Cache-Controlpublic, max-age=300, stale-while-revalidate=3600
Cache-Tagcatalogmodel:openai--gpt-5.5-instant

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:openai--gpt-5.5-instant',
  }),
})

Invalidate this cache tag

await ctx.cache.purge({ tags: ['model:openai--gpt-5.5-instant'] })

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

ReasoningTool callingStructured outputAttachmentsTemperature control
Released
May 5, 2026
Last updated
May 28, 2026
Context window
400K tokens
Max output
128K tokens
Open weights
No
Family

Starts at

$5

per 1M input tokens

Output

$30

Sellers

1

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, Image, Pdf
OutputText
Provider shelf
Where to get GPT-5.5 Instant

Sorted by lowest input price

ProviderInput / 1MOutput / 1MContext

ZenMux

openai/gpt-5.5-instant

$5$30400KDocs
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