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anthropic/claude-sonnet-4-5-20250929

Claude Sonnet 4.5

Balanced Claude model for coding, analysis, agent workflows, and cost control

This model's cache

This model page returns the exact headers below. The page and /api/models/anthropic--claude-sonnet-4-5-20250929 share the model:anthropic--claude-sonnet-4-5-20250929 tag, so invalidation stays scoped to this model.

Cache key/models/anthropic--claude-sonnet-4-5-20250929
Cache-Controlpublic, max-age=300, stale-while-revalidate=3600
Cache-Tagcatalogmodel:anthropic--claude-sonnet-4-5-20250929

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:anthropic--claude-sonnet-4-5-20250929',
  }),
})

Invalidate this cache tag

await ctx.cache.purge({ tags: ['model:anthropic--claude-sonnet-4-5-20250929'] })

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

Claude SonnetReasoningTool callingAttachmentsTemperature control
Released
Sep 29, 2025
Last updated
Sep 29, 2025
Context window
200K tokens
Max output
64K tokens
Open weights
No
Family
Claude Sonnet

Starts at

$3

per 1M input tokens

Output

$15

Sellers

2

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 Claude Sonnet 4.5

Sorted by lowest input price

ProviderInput / 1MOutput / 1MContext

Merge Gateway

anthropic/claude-sonnet-4-5-20250929

$3$15200KDocs

Anthropic

claude-sonnet-4-5-20250929

$3$151MDocs
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