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Smart routing that automatically uses cheaper models when quality allows. Built by developers tired of expensive AI bills.
From our beta testing and SDK usage
GPT-4 → GPT-3.5 routing
Smart model selection
Prompt optimization
Average savings: 52%
Setup time: 5 minutes • Results visible: 24 hours
Install once. Save money automatically.
Prompt Optimization
AI rewrites prompts to be 40-60% shorter while maintaining quality
Smart Model Routing
Routes simple tasks to GPT-3.5, complex ones to GPT-4
Response Caching
Identical requests return cached results (free + instant)
import CostLens from 'costlens';
import OpenAI from 'openai';
const costlens = new CostLens({
apiKey: process.env.COSTLENS_KEY
});
// Wrap once
const openai = costlens.wrapOpenAI(
new OpenAI()
);
// Use normally - savings happen automatically
const result = await openai.chat.completions.create({
model: 'gpt-4',
messages: [...]
});
// ✅ Prompt optimized (47% shorter)
// ✅ Routed to GPT-3.5 (20x cheaper)
// ✅ Saved $0.023 on this requestPay only when you're saving money
ROI Guarantee: If we don't save you 10x what you pay, we refund everything.
Practical guides and strategies from our team
Learn proven strategies to cut your OpenAI and LLM costs while maintaining response quality.
Complete cost breakdown of GPT-4, GPT-3.5, Claude 3 Opus, Sonnet, and Haiku with real pricing data.
Discover cost-effective GPT-4 alternatives that reduce LLM costs by 40-70% while maintaining quality.
Join developers already reducing their AI costs
Stop The Bleeding NowFree forever plan • 5-minute setup • Results in 24 hours