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 Opus 4.5 brings further reasoning, coding, and agentic improvements over Opus 4.1, with stronger tool use and tighter instruction following.
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 Opus 4.5
client.chat.completions.create(
model="anthropic/claude-opus-4.5",
messages=[{"role":"user","content":"hello"}],
)