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openai/o3

o3

Deliberate o-series reasoner for hard math, coding, and multi-step analysis

This model's cache

This model page returns the exact headers below. The page and /api/models/openai--o3 share the model:openai--o3 tag, so invalidation stays scoped to this model.

Cache key/models/openai--o3
Cache-Controlpublic, max-age=300, stale-while-revalidate=3600
Cache-Tagcatalogmodel:openai--o3

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--o3',
  }),
})

Invalidate this cache tag

await ctx.cache.purge({ tags: ['model:openai--o3'] })

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

OReasoningTool callingStructured outputAttachments
Released
Apr 16, 2025
Last updated
Apr 16, 2025
Context window
200K tokens
Max output
100K tokens
Open weights
No
Family
O

Starts at

Free

per 1M input tokens

Output

Free

Sellers

11

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 o3

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GitHub Models

openai/o3

FreeFree200KDocs

Poe

openai/o3

$1.8$7.2200KDocs

Vercel AI Gateway

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$2$8200KDocs

OpenAI

o3

$2$8200KDocs

Merge Gateway

openai/o3

$2$8200KDocs

NEAR AI Cloud

openai/o3

$2$8200KDocs

Cloudflare AI Gateway

openai/o3

$2$8200KDocs

Kilo Gateway

openai/o3

$2$8200KDocs

OpenRouter

openai/o3

$2$8200KDocs

NanoGPT

openai/o3

$2$8200KDocs

AnyAPI

openai/o3

QuoteQuote200KDocs
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