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openai/gpt-5.1-codex-max

GPT-5.1 Codex Max

Coding-optimized GPT model for repository edits, reviews, and agentic software work

This model's cache

This model page returns the exact headers below. The page and /api/models/openai--gpt-5.1-codex-max share the model:openai--gpt-5.1-codex-max tag, so invalidation stays scoped to this model.

Cache key/models/openai--gpt-5.1-codex-max
Cache-Controlpublic, max-age=300, stale-while-revalidate=3600
Cache-Tagcatalogmodel:openai--gpt-5.1-codex-max

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-5.1-codex-max',
  }),
})

Invalidate this cache tag

await ctx.cache.purge({ tags: ['model:openai--gpt-5.1-codex-max'] })

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

Gpt CodexReasoningTool callingStructured outputAttachments
Released
Nov 13, 2025
Last updated
Nov 13, 2025
Context window
400K tokens
Max output
128K tokens
Open weights
No
Family
Gpt Codex

Starts at

$1.1

per 1M input tokens

Output

$9

Sellers

8

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
OutputText
Provider shelf
Where to get GPT-5.1 Codex Max

Sorted by lowest input price

ProviderInput / 1MOutput / 1MContext

Requesty

openai/gpt-5.1-codex-max

$1.1$9400KDocs

Poe

openai/gpt-5.1-codex-max

$1.1$9400KDocs

Vercel AI Gateway

openai/gpt-5.1-codex-max

$1.25$10400KDocs

OpenAI

gpt-5.1-codex-max

$1.25$10400KDocs

OrcaRouter

openai/gpt-5.1-codex-max

$1.25$10400KDocs

Kilo Gateway

openai/gpt-5.1-codex-max

$1.25$10400KDocs

OpenRouter

openai/gpt-5.1-codex-max

$1.25$10400KDocs

NanoGPT

openai/gpt-5.1-codex-max

$2.5$20400KDocs
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