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.
Claude Opus 5.5 is Anthropic's model for long-running agentic coding and knowledge work. It combines a one million token context window with adaptive thinking that is always on, a 128K token maximum output, and a medium default effort level.
Google's frontier model for deep work on complex, real-world tasks across coding, finance, legal, cybersecurity and science. The first model in the Gemini 4 family.
from openai import OpenAI
client = OpenAI(
base_url="https://api.aigateway.sh/v1",
api_key="sk-aig-...",
)
# Claude Opus 5.5
client.chat.completions.create(
model="anthropic/claude-opus-5.5",
messages=[{"role":"user","content":"hello"}],
)
# Gemini 4 Argon
client.chat.completions.create(
model="google/gemini-4-argon",
messages=[{"role":"user","content":"hello"}],
)