Pricing per million tokens, context window, capabilities — pulled from each provider's public docs. All 2 are available via the same AIgateway OpenAI-compatible endpoint; flip the model string to switch.
GPT-5.4 nano is OpenAI's smallest and fastest model, optimized for edge and low-latency use cases.
GPT-5.5 is OpenAI's flagship model with strong coding, reasoning, and multimodal capabilities.
from openai import OpenAI
client = OpenAI(
base_url="https://api.aigateway.sh/v1",
api_key="sk-aig-...",
)
# GPT-5.4 Nano
client.chat.completions.create(
model="openai/gpt-5.4-nano",
messages=[{"role":"user","content":"hello"}],
)
# GPT-5.5
client.chat.completions.create(
model="openai/gpt-5.5",
messages=[{"role":"user","content":"hello"}],
)