GPT-5.5

GPT‑5.5 understands what you're trying to do faster and can carry more of the work itself. It excels at writing and debugging code, researching online, analyzing data, creating documents and spreadsheets, operating software, and moving across tools until a task is finished.

Context 1M·Max out 128K

Quickstart

import { streamText } from 'ai';
import { createOpenAICompatible } from '@ai-sdk/openai-compatible';

const blackbox = createOpenAICompatible({
  name: 'blackbox',
  apiKey: process.env.BLACKBOX_API_KEY!,
  baseURL: 'https://api.blackbox.ai/v1',
});

const result = streamText({
  model: blackbox('blackboxai/openai/gpt-5.5'),
  prompt: 'Why is the sky blue?',
});

for await (const chunk of result.textStream) {
  process.stdout.write(chunk);
}

Specs & pricing

Input $/M: $5
Output $/M: $30
Context window: 1M
Max output: 128K
Supported parameters: tool-usereasoningvisionjson-modestreamingweb-search

Related models

Model	Type	Context	Input $/M
GPT-5.5 Pro	Text	1M	$30
GPT-5.4 Pro	Text	1.1M	$30
GPT-5.4	Text	1.1M	$2.50
GPT-5.4 Nano	Text	400K	$0.20
GPT-5.3 Codex	Text	400K	$1.75