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 Haiku 5.5 is a fast, cost-efficient model for high-volume, latency-sensitive tasks such as classification, extraction, routing, and subagent work.
Claude Sonnet 4.5 is the best coding model to date, with significant improvements across the entire development lifecycle.
from openai import OpenAI
client = OpenAI(
base_url="https://api.aigateway.sh/v1",
api_key="sk-aig-...",
)
# Claude Haiku 5.5
client.chat.completions.create(
model="anthropic/claude-haiku-5.5",
messages=[{"role":"user","content":"hello"}],
)
# Claude Sonnet 4.5
client.chat.completions.create(
model="anthropic/claude-sonnet-4.5",
messages=[{"role":"user","content":"hello"}],
)