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.
xAI Grok 4 Fast — low-latency variant.
xAI's Grok 4.3 model with a 1M-token context window and strong agentic tool calling with minimal hallucinations. Accepts text and image inputs, and supports function calling, structured outputs, and configurable reasoning effort (none, low, medium, high).
from openai import OpenAI
client = OpenAI(
base_url="https://api.aigateway.sh/v1",
api_key="sk-aig-...",
)
# Grok 4 Fast
client.chat.completions.create(
model="xai/grok-4-fast",
messages=[{"role":"user","content":"hello"}],
)
# Grok 4.3
client.chat.completions.create(
model="xai/grok-4.3",
messages=[{"role":"user","content":"hello"}],
)