Point your OpenAI SDK at CARTIE. Pay 20-50% less on the next call.
Drop-in proxy for OpenAI, Anthropic, Gemini, Groq, and Mistral. Same response shape. Three savings layers (compaction · cache · cascade) baked in. Headers tell you exactly what we saved on every call.
1
Try it · no signup
Watch us shrink a real prompt.
Your prompt
After compaction
You are a helpful customer support assistant for ACME Corp. The user's name is John Doe. They have an enterprise account. The user's name is John Doe. They have an enterprise account. Question: What is the refund policy?
Original
81 tok
Compacted
55 tok
Saved
32%
2
Your bill, with CARTIE
What this saves you at your volume.
Blended savings estimate: 47% (compaction 19% · cache ~18% · cascade ~10%). Heavy batch workloads see higher; chat apps see lower. We'll show your real numbers on day 1.
You save
$1,181
per month at this volume
$14,178 / year · vs. monthly bill of $2,500
3
Drop-in install · 1 line of code
Same SDK. New base_url.
from openai import OpenAI
client = OpenAI(
api_key="<YOUR-OPENAI-KEY>",
base_url="https://cartieai.com/api/llm-proxy/v1",
default_headers={"X-Cartie-Key": "<YOUR-CARTIE-PROXY-KEY>"},
)
# Every call: compacted → cached → cascaded.
# Returns standard OpenAI response.
resp = client.chat.completions.create(
model="gpt-5.2",
messages=[{"role": "user", "content": "Hello"}],
)
# Response headers tell you exactly what we saved:
# X-Cartie-Tokens-Saved, X-Cartie-Cache-Hit, X-Cartie-Saved-Usd
No new SDK to learn. Compatible with the existing openai, anthropic, and langchain libraries you already use — all five providers are OpenAI-compatible.
3× ROI guarantee · contractually binding
If we don't save you 3× our subscription fee in your first 90 days, you get a full refund. In writing.
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