OpenRouter

OpenRouter: Anthropic: Claude Opus 5.5 (OpenRouter)

Newstable

Anthropic: Claude Opus 5.5 (OpenRouter) is available through Everstack's OpenAI-compatible gateway with routing, fallback, retries, and observability.

anthropic-claude-opus-5.5anthropicreleased Sep 22, 2026
ProviderQuick start
Context
1M
tokens
Max output
128K
tokens
Input
$4.00
per 1M
Output
$20.00
per 1M

Activity

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

Providers

ProviderContextInput /MOutput /M
OpenRouter
OpenRouter
1M$4.00$20.00

Pricing

ItemPriceUnit
Input$4.00per 1M tokens
Output$20.00per 1M tokens
Cache read$0.20per 1M tokens
Cache write$5.00per 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
anthropic-claude-opus-5.5
Family
anthropic
Status
stable
Knowledge
-
Released
Sep 22, 2026
Gateway Config
API
2024-01-01
Auth
OPENROUTER_API_KEY
Discovery
dynamic
Provider type
meta

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: "@openrouter/anthropic-claude-opus-5.5",  messages: [{ role: "user", content: "Explain vector cache routing." }],});console.log(completion.choices[0]?.message?.content);

Endpoint

Base URL
https://openrouter.ai/api/v1
Chat completions
https://openrouter.ai/api/v1/chat/completions
Model
anthropic-claude-opus-5.5
Auth env
OPENROUTER_API_KEY

Anthropic: Claude Opus 5.5 (OpenRouter) FAQ

How much does the Anthropic: Claude Opus 5.5 (OpenRouter) API cost?

Through OpenRouter, Anthropic: Claude Opus 5.5 (OpenRouter) costs $4.00 per 1M input tokens and $20.00 per 1M output tokens.

What is the context window of Anthropic: Claude Opus 5.5 (OpenRouter)?

Anthropic: Claude Opus 5.5 (OpenRouter) accepts up to 1M tokens of context and returns up to 128K output tokens on OpenRouter.

What can Anthropic: Claude Opus 5.5 (OpenRouter) do?

Anthropic: Claude Opus 5.5 (OpenRouter) supports chat, function calling, image input and reasoning. It accepts text, image and PDF input.

How do I call Anthropic: Claude Opus 5.5 (OpenRouter) through Everstack?

Point any OpenAI-compatible SDK at your Everstack gateway and set the model to @openrouter/anthropic-claude-opus-5.5. Everstack adds retries, provider fallback, caching, per-tenant budgets and OpenTelemetry traces for every request.