GPT-5.3 Codex API Chatbots
Build AI chatbots and conversational assistants powered by GPT-5.3 Codex. Full streaming support means users see tokens in real time — no waiting for complete responses.
GPT-5.3 Codex Pricing
| Token Type | Qubax | Retail | Save |
|---|---|---|---|
| Input (per 1M) | $0.114 | $1.75 | 94% |
| Output (per 1M) | $0.908 | $14.00 | 94% |
Running a chatbot (2K input + 500 output tokens, 1,000 conversations/day) costs approximately $20.43/month on Qubax.
Why use GPT-5.3 Codex for chatbots on Qubax?
- 💬Customer support chatbots with 24/7 availability
- 💬AI assistants that remember conversation context
- 💬Multi-language chatbots serving global audiences
- 💬Streaming responses for instant perceived speed
About GPT-5.3 Codex
GPT-5.3 Codex is a text generation model available on Qubax. It supports a 400K-token context window and up to 128K output tokens per request. Native capabilities include reasoning, vision, tool calling, structured output, streaming, context caching. On Qubax it is served by 461 independent sellers, so pricing stays competitive and uptime stays high.
GPT-5.3 Codex Chatbots — code example
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.qubax.ai/v1",
apiKey: process.env.QUBAX_KEY,
});
const stream = await client.chat.completions.create({
model: "gpt-5.3-codex",
messages: [...history, { role: "user", content: userMessage }],
stream: true,
});
for await (const chunk of stream) {
process.stdout.write(chunk.choices[0]?.delta?.content ?? "");
}More OpenAI models on Qubax
Get started in 60 seconds
- 1Create a free account at qubax.ai/register
- 2Add crypto credits (200+ coins, $3 minimum, credits never expire)
- 3Generate an API key and set your base URL to
https://api.qubax.ai/v1 - 4Use model ID
gpt-5.3-codex— done!
GPT-5.3 Codex Chatbots FAQ
How much does GPT-5.3 Codex cost for chatbots?
On Qubax, GPT-5.3 Codex costs $0.114 per 1M input tokens and $0.908 per 1M output tokens. 94% cheaper than OpenRouter. Pay with 200+ cryptocurrencies.
Can I use GPT-5.3 Codex with my existing tools?
Yes. Qubax is fully OpenAI-compatible. Change your base URL to api.qubax.ai/v1 and use your Qubax key. Works with Cline, Cursor, OpenCode, LangChain, and any OpenAI SDK.
Do I need a credit card?
No. Qubax accepts 200+ cryptocurrencies. No credit card, no KYC.
Start using GPT-5.3 Codex for chatbots
No credit card. Crypto accepted. Credits never expire.
Get started →