Claude Sonnet 4.6

Anthropic model combining high intelligence with fast responses.

Anthropicclaude-sonnet-4-62026-02-17Report incorrect data

Specs

Context: 1M
Max output: 128K
Input price: $3/ 1M tokens
Output price: $15/ 1M tokens
Released: 2026-02-17

Context

Context window: 1M
Max input: 1M
Max output: 128K

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: lowmediumhighmax

Info

Status: Active
Released: 2026-02-17
Knowledge cutoff: 2025-08

Features

Confirmed: toolsstructured_outputstreamingcachingbatch

How to call

anthropicmodel = claude-sonnet-4-6reasoning = output_config.effort

messages

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

batch

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

JSON

claude-sonnet-4-6.json

{
  "id": "claude-sonnet-4-6",
  "object": "model",
  "created": 1771286400,
  "owned_by": "anthropic",
  "name": "Claude Sonnet 4.6",
  "api": {
    "types": [
      "messages",
      "batch"
    ]
  },
  "limits": {
    "context": 1000000,
    "input": 1000000,
    "output": 128000
  },
  "modalities": {
    "input": [
      "text",
      "image",
      "document"
    ],
    "output": [
      "text"
    ]
  },
  "reasoning": {
    "supported": true,
    "efforts": [
      "low",
      "medium",
      "high",
      "max"
    ]
  },
  "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": "active",
    "release_date": "2026-02-17",
    "knowledge_cutoff": "2025-08",
    "description": "Anthropic model combining high intelligence with fast responses.",
    "docs": "https://platform.claude.com/docs/en/models/sonnet-4-6/overview",
    "verified_at": "2026-10-10"
  }
}

Official sources