Vertex AI

Vertex AI: Claude Sonnet 4.6 (Vertex)

stable

Claude Sonnet 4.6 (Vertex) is available through Everstack's OpenAI-compatible gateway with routing, fallback, retries, and observability.

claude-sonnet-4-6@defaultclaude-4released Feb 17, 2026
ProviderQuick start
Context
1M
tokens
Max output
128K
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
Anthropic
1M$3.00$15.00
AWS Bedrock
AWS Bedrock
1M$3.00$15.00
Vertex AI
Vertex AI
1M$3.00$15.00

Pricing

ItemPriceUnit
Input$3.00per 1M tokens
Output$15.00per 1M tokens
Cache read$0.30per 1M tokens
Cache write$3.75per 1M tokens

Performance

Reliability

Compare

Compare usage and performance
Place this model beside up to three other catalog models.

Capabilities

Capabilities
Modalities
Input
Output
Details
Model ID
claude-sonnet-4-6@default
Family
claude-4
Status
stable
Knowledge
-
Released
Feb 17, 2026
Gateway Config
API
v1
Auth
GOOGLE_APPLICATION_CREDENTIALS
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: "@vertex-ai/claude-sonnet-4-6@default",  messages: [{ role: "user", content: "Explain vector cache routing." }],});console.log(completion.choices[0]?.message?.content);

Endpoint

Base URL
https://{location}-aiplatform.googleapis.com/v1/projects/{project}/locations/{location}
Chat completions
https://{location}-aiplatform.googleapis.com/v1/projects/{project}/locations/{location}/chat/completions
Model
claude-sonnet-4-6@default
Auth env
GOOGLE_APPLICATION_CREDENTIALS

Claude Sonnet 4.6 (Vertex) FAQ

How much does the Claude Sonnet 4.6 (Vertex) API cost?

Through Vertex AI, Claude Sonnet 4.6 (Vertex) costs $3.00 per 1M input tokens and $15.00 per 1M output tokens.

What is the context window of Claude Sonnet 4.6 (Vertex)?

Claude Sonnet 4.6 (Vertex) accepts up to 1M tokens of context and returns up to 128K output tokens on Vertex AI.

Which providers offer Claude Sonnet 4.6 (Vertex)?

Claude Sonnet 4.6 (Vertex) is available from Anthropic, AWS Bedrock and Vertex AI. Everstack can route between them with automatic fallback when one is unavailable.

What can Claude Sonnet 4.6 (Vertex) do?

Claude Sonnet 4.6 (Vertex) supports chat, function calling, image input and reasoning. It accepts text, image and PDF input.

How do I call Claude Sonnet 4.6 (Vertex) through Everstack?

Point any OpenAI-compatible SDK at your Everstack gateway and set the model to @vertex-ai/claude-sonnet-4-6@default. Everstack adds retries, provider fallback, caching, per-tenant budgets and OpenTelemetry traces for every request.