ModelInfo
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All models

Claude Sonnet 4.5

Anthropicclaude-sonnet-4-52025-09-29Report incorrect data

Specs

Context
200K
Max output
64K
Input price
$3/ 1M tokens
Output price
$15/ 1M tokens
Released
2025-09-29

Context

Context window
200K
Max input
200K
Max output
64K

Pricing · USD / 1M tokens

Input
$3
Output
$15
Cache read
$0.3
Cache write
$3.75

Modalities

Input
TextImageDocument
Output
Text

API

API types
messagesbatch

Reasoning

Reasoning
Yes
Levels
—

Info

Status
Deprecated
Released
2025-09-29
Knowledge cutoff
2025-01

Features

Confirmed
toolsstructured_outputstreamingcachingbatch
Source · official docsVerified 2026-10-10

How to call

1 provider

anthropicmodel = claude-sonnet-4-5reasoning = thinking

messages
POSThttps://api.anthropic.com/v1/messages
batch
POSThttps://api.anthropic.com/v1/messages/batches

JSON

Standard format
claude-sonnet-4-5.json
{
  "id": "claude-sonnet-4-5",
  "object": "model",
  "created": 1759104000,
  "owned_by": "anthropic",
  "name": "Claude Sonnet 4.5",
  "api": {
    "types": [
      "messages",
      "batch"
    ]
  },
  "limits": {
    "context": 200000,
    "input": 200000,
    "output": 64000
  },
  "modalities": {
    "input": [
      "text",
      "image",
      "document"
    ],
    "output": [
      "text"
    ]
  },
  "reasoning": {
    "supported": true,
    "efforts": []
  },
  "pricing": {
    "currency": "USD",
    "unit": "1M_tokens",
    "input": 3,
    "output": 15,
    "cache_read": 0.3,
    "cache_write": 3.75
  },
  "features": [
    "tools",
    "structured_output",
    "streaming",
    "caching",
    "batch"
  ],
  "info": {
    "status": "deprecated",
    "release_date": "2025-09-29",
    "knowledge_cutoff": "2025-01",
    "description": null,
    "docs": "https://platform.claude.com/docs/en/models/sonnet-4-5/overview",
    "verified_at": "2026-10-10"
  }
}

Official sources

9