GPT-5.5
OpenAI's current flagship chat model (released April 2026). Strongest general reasoning, coding and tool use in the GPT-5 line, with vision input and a large context window.
GPT-5.5 is text & chat AI model from OpenAI, priced at €1.50 per 1M input tokens with a 400K tokens context window.
About this model
0.7
Pricing
API Integration
Use our OpenAI-compatible API to integrate GPT-5.5 into your application.
npm install railwailimport railwail from "railwail";
const rw = railwail("YOUR_API_KEY");
// Simple — just pass a string
const reply = await rw.run("gpt-5-5", "Hello! What can you do?");
console.log(reply);
// With message history
const reply2 = await rw.run("gpt-5-5", [
{ role: "system", content: "You are a helpful assistant." },
{ role: "user", content: "Explain quantum computing simply." },
]);
console.log(reply2);
// Full response with usage info
const res = await rw.chat("gpt-5-5", [
{ role: "user", content: "Hello!" },
], { temperature: 0.7, max_tokens: 500 });
console.log(res.choices[0].message.content);
console.log(res.usage);Frequently asked questions
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