Anthropic: Claude Sonnet 4

Name: Claude Sonnet 4 API
Brand: Anthropic

stable

Claude Sonnet 4 is available through Everstack's OpenAI-compatible gateway with routing, fallback, retries, and observability.

claude-sonnet-4-20250514claude-4

Provider Quick start

Context

200K

tokens

Max output

64K

tokens

Input

$3.00

per 1M

Output

$15.00

per 1M

Activity

Daily period usage

Aggregated managed Everstack traffic. Buckets below 5 tenants or 100 requests are withheld.

Providers

ProviderContextInput /MOutput /M

Anthropic

200K$3.00$15.00

Pricing

Item	Price	Unit
Input	$3.00	per 1M tokens
Output	$15.00	per 1M tokens

Performance

Reliability

Compare

Compare usage and performance

Place this model beside up to three other catalog models.

Capabilities

Modalities

Input

Output

Details

Model ID: claude-sonnet-4-20250514
Family: claude-4
Status: stable
Knowledge: -
Released: -

Gateway Config

API: 2023-06-01
Auth: ANTHROPIC_API_KEY
Discovery: static
Provider type: static

Quick Start

index.ts

import Everstack from "@everstack/node";const client = new Everstack({  apiKey: process.env.EVERSTACK_API_KEY!,  baseUrl: "https://{instance}.{region}.everstack.ai",});const completion = await client.chat.completions.create({  model: "@anthropic/claude-sonnet-4-20250514",  messages: [{ role: "user", content: "Explain vector cache routing." }],});console.log(completion.choices[0]?.message?.content);

Endpoint

Base URL

https://api.anthropic.com/v1

Chat completions

https://api.anthropic.com/v1/chat/completions

Model

claude-sonnet-4-20250514

Auth env

ANTHROPIC_API_KEY

Claude Sonnet 4 FAQ

How much does the Claude Sonnet 4 API cost?

Through Anthropic, Claude Sonnet 4 costs $3.00 per 1M input tokens and $15.00 per 1M output tokens.

What is the context window of Claude Sonnet 4?

Claude Sonnet 4 accepts up to 200K tokens of context and returns up to 64K output tokens on Anthropic.

What can Claude Sonnet 4 do?

Claude Sonnet 4 supports chat, function calling, image input, extended thinking and computer use. It accepts text and image input.

How do I call Claude Sonnet 4 through Everstack?

Point any OpenAI-compatible SDK at your Everstack gateway and set the model to @anthropic/claude-sonnet-4-20250514. Everstack adds retries, provider fallback, caching, per-tenant budgets and OpenTelemetry traces for every request.