Claude Sonnet 4.6

Anthropic's high-performance daily driver for coding, agents, and professional workflows at scale.

Hybrid ReasoningAgentsProduction Scale

Context Window

1M tokens

claude-sonnet-4-6

Max Output

1M tokens

Input

$2.7$3

10% off

1M tokens

Output

$13.5$15

10% off

1M tokens

Model Codeclaude-sonnet-4-6

Playground

Model Code

claude-sonnet-4-6

Reference inputs

Reference Images0/5

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Output

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Pricing

Plan	Context Window	Max Output	Input	Output	Cache Write	Cache Read
claude-sonnet-4-6	1M tokens	-	$2.7$310% off 1M tokens	$13.5$1510% off 1M tokens	$3.375$3.7510% off 1M tokens	$0.27$0.310% off 1M tokens

1h Cache Write · $5.4 · 1M tokens

Cache read or cached input pricing applies to reused prompt tokens.

README

Claude Sonnet 4.6 is Anthropic's most capable Sonnet model yet, combining strong coding, computer-use, long-context reasoning, and enterprise productivity performance in a more cost-efficient profile than Opus.

Anthropic presents Sonnet 4.6 as a frontier-performance model for daily use, scaled production systems, and complex tasks across coding, agents, and knowledge work.
It supports both fast responses and extended step-by-step thinking, with strong gains in instruction following, tool use, and long-horizon autonomous workflows.
Official materials highlight that Sonnet 4.6 can deliver near-Opus-level capability for many workloads while keeping a more efficient performance-to-cost profile.

API

Use the API docs for request format, parameters, and integration details.

Anthropic's high-performance daily driver for coding, agents, and professional workflows at scale.

Model Code

claude-sonnet-4-6

View API Docs

API

Endpoint

POST /v1/messages

Authentication

Authorization: Bearer YOUR_REACH_API_KEY
anthropic-version: 2023-06-01
Content-Type: application/json

Example

curl -X POST "https://direct.reachapi.ai/v1/messages" \
  -H "Authorization: Bearer YOUR_REACH_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "YOUR_MODEL_ID",
    "messages": [
      {
        "role": "user",
        "content": "Introduce ReachAPI in one sentence."
      }
    ],
    "max_tokens": 512,
    "temperature": 0.2
  }'

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