GPT-5.5

Overview

A prior flagship reasoning model for coding and professional work. 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.

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

Each request uses the tier matching its full input context, including cached input. Output tokens do not choose the tier. Choose the row for your cache and thinking modes.

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 OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://gateway.agentsky.dev/v1",
  apiKey: process.env.AGENTSKY_API_KEY, // ast_…
});

const completion = await client.chat.completions.create({
  model: "openai/gpt-5.5",
  messages: [{ role: "user", content: "Summarise this ticket." }],
});
console.log(completion.usage.cost); // USD, in the response

Questions

More from OpenAI