GPT-5.5 API
OpenAI's current flagship model with frontier reasoning, coding, and multimodal capabilities.
💰 Save up to 70% vs official OpenAI pricingTechnical Specifications
| Provider | OpenAI |
| Model Family | GPT-5.5 |
| Release Date | 2026-05 |
| Context Window | 256K |
| Max Output Tokens | 32,768 |
| Input Price | $5.00 / 1M tokens |
| Output Price | $30.00 / 1M tokens |
| Vision Support | Yes ✓ |
| Function Calling | Yes ✓ |
| JSON Mode | Yes ✓ |
| Streaming | Yes ✓ |
| Fine Tuning | Available |
| Status | Active ✓ |
Overview
GPT-5.5 is OpenAI's current gpt5-class AI model, released in 2026-05. OpenAI's current flagship model with frontier reasoning, coding, and multimodal capabilities.
With a 256K context window and maximum output of 32,768 tokens, GPT-5.5 is well-suited for frontier performance and best reasoning. At $5.00/1M input and $30.00/1M output, it offers premium pricing within the OpenAI ecosystem.
GPT-5.5 supports 4 capabilities: Vision, Function Calling, JSON Mode, Streaming. Fine-tuning is available for custom model adaptation. The model serves as an frontier performance solution for developers building multimodal AI applications.
Through AI API Hub, you can access GPT-5.5 with USDT & USDC payments, no credit card required. All via a fully OpenAI-compatible API — just change your base URL and start building in 30 seconds.
API Examples
Python
from openai import OpenAI
client = OpenAI(
api_key="YOUR_API_KEY",
base_url="https://api.apiyihe.org/v1"
)
response = client.chat.completions.create(
model="gpt-5.5",
messages=[
{"role": "user", "content": "Hello"}
]
)
print(response.choices[0].message.content)JavaScript / Node.js
import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.API_KEY,
baseURL: "https://api.apiyihe.org/v1"
});
const response = await client.chat.completions.create({
model: "gpt-5.5",
messages: [
{ role: "user", content: "Hello" }
]
});
console.log(response.choices[0].message.content);cURL
curl https://api.apiyihe.org/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
"model": "gpt-5.5",
"messages": [
{"role": "user", "content": "Hello"}
]
}'Compare Alternatives
Frequently Asked Questions
What is GPT-5.5?
GPT-5.5 is OpenAI's current gpt5 model. OpenAI's current flagship model with frontier reasoning, coding, and multimodal capabilities.. It features a 256K context window, supports Vision, Function Calling, JSON Mode, and is available through AI API Hub with USDT/USDC payments.
How much does GPT-5.5 cost?
GPT-5.5 pricing: $5.00 per 1M input tokens, $30.00 per 1M output tokens. Pay-as-you-go with no minimum commitment. Sign up at AI API Hub and start with as little as $5.
GPT-5.5 vs Claude Opus 4.8?
GPT-5.5: $5.00/$1M input, 256K context. Claude Opus 4.8: $5.00/$1M input, 1M context. GPT-5.5 is more cost-effective. Frontier performance. Compare them at /compare/gpt-5.5-vs-claude-opus-4.8/.
GPT-5.5 context window?
GPT-5.5 has a 256K context window, capable of processing up to 256,000 tokens in a single request. Maximum output tokens: 32,768.
Does GPT-5.5 support function calling?
Yes, GPT-5.5 supports function/tool calling, allowing you to define functions that the model can invoke. This enables AI agents, API integrations, and structured data extraction.
Is GPT-5.5 multimodal?
Partially — GPT-5.5 supports vision (image input) but not native audio processing.
GPT-5.5 API rate limits?
GPT-5.5 rate limits: 10K RPM. Higher tier plans offer increased throughput. For high-volume production use, consider OpenAI's faster variant models.
How to access GPT-5.5 API?
Access GPT-5.5 through AI API Hub: (1) Register at api.apiyihe.org/register?aff=8JZC, (2) Deposit USDT/USDC, (3) Get your API key instantly, (4) Use the OpenAI-compatible endpoint https://api.apiyihe.org/v1 with model name "gpt-5.5". Start building in under 30 seconds.