Blackbox Pro

GPT-5.3-Codex advances both the frontier coding performance of GPT-5.2-Codex and the reasoning and problem-solving capabilities of GPT-5, making it the most capable coding model from OpenAI.

Context 400K·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/blackbox-pro'),
  prompt: 'Why is the sky blue?',
});

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

Specs & pricing

Input $/M: $1.75
Output $/M: $14
Context window: 400K
Max output: 128K
Supported parameters: tool-usereasoningvisionjson-modestreaming

Related models

Model	Type	Context	Input $/M
GPT-5.3 Codex	Text	400K	$1.75
MiniMax M2.5	Text	128K	$0.30
Claude Opus 4.6	Text	1M	$5
Gemini 3.1 Pro	Text	1.0M	$2
Sonnet 4.6	Text	1M	$3