Visualize Your Context Window
Analyze prompt token usage in real-time, visualize consumption against model context windows, and get actionable optimization suggestions — built for AI engineers and LLM developers.
prompt-analyzer.tsx
Context Window Usage — GPT-4 (128k tokens)
System (18%)User (34%)Assistant (11%)Free (37%)
81,920
Tokens Used
$0.082
Est. Cost
37%
Window Free
Simple Pricing
Pro
$25
/month
- ✓ Real-time token counting (tiktoken)
- ✓ Visual context window breakdown
- ✓ Multi-model support (GPT-4, Claude, Gemini)
- ✓ Cost estimation per request
- ✓ Optimization suggestions
- ✓ Unlimited prompts
FAQ
Which AI models are supported?
GPT-3.5, GPT-4, GPT-4o, Claude 3 (Haiku, Sonnet, Opus), and Gemini Pro/Ultra — with accurate tokenization for each.
How accurate is the token counting?
We use tiktoken (OpenAI's official tokenizer) and model-specific tokenizers to ensure counts match what you're billed for.
Can I cancel anytime?
Yes. Cancel anytime from your billing portal — no questions asked, no lock-in.