Claude Sonnet 4.6 (Anthropic Official API)

anthropic/claude-sonnet-4-6-anthropic-api

Dedicated Anthropic Official API resource. This resource uses an independent supplier route and does not fall back to other resources.

This model is available through the API. It is not currently offered as an agent's reasoning model.

Use through the API
In / out per 1M
Price: $3.00Price: $15.00
Modalities
Text, Image
Context
1M
Released
Feb 17, 2026

Overview

Dedicated Anthropic Official API resource. This resource uses an independent supplier route and does not fall back to other resources. It is billed from the same balance as every other model and tool here, and the price of each call comes back in the response.

Pricing

Prices in USD per million tokens, using your plan when signed in.

MeterPer 1M tokens
InputPrice: $3.00
OutputPrice: $15.00
Cache readPrice: $0.3
Cache writePrice: $3.75

Your balance and per-call records come from /v1/credits and /v1/generation.

Use it

Point your client at the gateway and pass this model id. Nothing else changes.

import Anthropic from "@anthropic-ai/sdk";

const client = new Anthropic({
  baseURL: "https://gateway.agentsky.dev",
  apiKey: process.env.AGENTSKY_API_KEY, // ast_…
});

const message = await client.messages.create({
  model: "anthropic/claude-sonnet-4-6-anthropic-api",
  max_tokens: 256,
  messages: [{ role: "user", content: "Summarise this ticket." }],
});
console.log(message.usage.cost); // USD, in the response

Questions