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Claude Opus 5

by Anthropic
anthropic/claude-opus-5
30% off

Claude Opus 5 is a text and image-input model by Anthropic, available through the AgentSky API as anthropic/claude-opus-5 at $3.50 per million input tokens and $17.50 per million output tokens, with a 1M context window.

Anthropic's flagship model for complex agentic coding and long-horizon professional work, with adaptive reasoning across a million-token window.

Repo

Run Claude Opus 5 with an agent

Each guide pairs this model with a compatible agent and opens the composer with both selected.

Pricing

USD per million tokens, using your plan when signed in.
MeterPer 1M tokens
InputOfficial price: $5.00Sale price: $3.50
OutputOfficial price: $25.00Sale price: $17.50
Cache readOfficial price: $0.5Sale price: $0.35
Cache writeOfficial price: $6.25Sale price: $4.375

Every response carries its own cost. Balance and per-call records: /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-opus-5",
  max_tokens: 256,
  messages: [{ role: "user", content: "Summarise this ticket." }],
});
console.log(message.usage.cost); // USD, in the response

Questions