AnthropicPaidOperational

Claude Sonnet 4.6 R

API model name: claude-sonnet-4-6-r

Claude Sonnet 4.6 R is Anthropic's chat model, served on the Api.Airforce unified API. Capabilities include Reasoning. It is priced at $0.29 per million input tokens and $1.42 per million output tokens. Access it through the OpenAI-compatible API with one key, alongside 100+ other models on Api.Airforce.

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Pricing

Input / 1M tokens

$0.29

Output / 1M tokens

$1.42

Cache read / 1M tokens

$0.03

Cache write / 1M tokens

$0.35

Specifications

Provider: Anthropic
Type: chat model

Capabilities

Reasoning

What is Claude Sonnet 4.6 R used for?

Chatbots & assistants — conversational AI, drafting, summarizing and Q&A.
Complex reasoning — math, coding and step-by-step problem solving.

Claude Sonnet 4.6 R vs. similar models

Model	Intelligence	Context	Input / 1M	Output / 1M
Claude Sonnet 4.6 R	—	—	$0.29	$1.42
[SP]claude Opus 4.6	—	—	$26.52	$0.02
[SP]claude Opus 4.7	—	—	$26.52	$0.02
[SP]claude Opus 4.8	—	—	$26.52	$0.02

Prices are Api.Airforce pay-as-you-go rates per 1M tokens. Context is the maximum input length.

Related models

[SP]claude Opus 4.6Anthropic · $26.52 / 1M [SP]claude Opus 4.7Anthropic · $26.52 / 1M [SP]claude Opus 4.8Anthropic · $26.52 / 1M [SP]claude Opus 5Anthropic · $26.52 / 1M [SP]claude Sonnet 4.6Anthropic · $26.52 / 1M [SP]claude Sonnet 5Anthropic · $26.52 / 1M BAAI/bge Reranker V2 M3Anthropic · $0.01 / 1M Chat LatestAnthropic · $6.50 / 1M Claude 3.5 HaikuAnthropic · $0.20 / 1M Claude 3.5 SonnetAnthropic · $0.59 / 1M Claude 3.5 SonnetAnthropic · $0.59 / 1M Claude 3.7 SonnetAnthropic · $0.59 / 1M

Claude Sonnet 4.6 R — frequently asked questions

How much does Claude Sonnet 4.6 R cost?: Claude Sonnet 4.6 R is billed pay-as-you-go at $0.29 per 1M input tokens and $1.42 per 1M output tokens. There is no subscription — you only pay for what you use.
What can Claude Sonnet 4.6 R do?: Claude Sonnet 4.6 R supports Reasoning.
Is Claude Sonnet 4.6 R free to use?: Claude Sonnet 4.6 R is a paid, pay-as-you-go model — no subscription, you are only charged for usage.
How do I use Claude Sonnet 4.6 R via the API?: Claude Sonnet 4.6 R is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID claude-sonnet-4-6-r with your Api.Airforce API key.
Who makes Claude Sonnet 4.6 R?: Claude Sonnet 4.6 R is Anthropic's chat model, served through the unified Api.Airforce gateway alongside 100+ other models.

All models·Quickstart·Chat API reference

Use Claude Sonnet 4.6 R via the API

OpenAI-compatible — point any OpenAI SDK at https://api.airforce/v1 and pass claude-sonnet-4-6-r as the model.

cURL

curl https://api.airforce/v1/chat/completions \
  -H "Authorization: Bearer $AIRFORCE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-4-6-r",
    "messages": [{ "role": "user", "content": "Hello!" }]
  }'

Python

from openai import OpenAI
client = OpenAI(base_url="https://api.airforce/v1", api_key="$AIRFORCE_API_KEY")
r = client.chat.completions.create(
    model="claude-sonnet-4-6-r",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(r.choices[0].message.content)

JavaScript

import OpenAI from "openai";
const client = new OpenAI({ baseURL: "https://api.airforce/v1", apiKey: process.env.AIRFORCE_API_KEY });
const r = await client.chat.completions.create({
  model: "claude-sonnet-4-6-r",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(r.choices[0].message.content);