How does NumStack calculate AI token costs?

NumStack uses real published pricing from OpenAI, Anthropic, Google, and other AI providers. Enter your typical usage (input tokens, output tokens, requests per day) to see projected monthly costs across all models.

Why do different AI models have different token prices?

Different models have different computational costs. Smaller models like GPT-4o mini or Haiku are cheaper but less capable. Larger models like GPT-4o or Claude Sonnet are more powerful but cost more per token.

How can I reduce my AI API costs?

Use smaller models for simple tasks, cache repeated prompts, trim output length (output tokens cost 3-5x more than input), and batch requests instead of real-time when latency allows.

Agent Workflow Cost Analyzer

Break down costs across multi-step AI agent workflows

Build your workflow step-by-step. Swap models and watch costs change in real-time.

Build Your Workflow

Add or remove steps and adjust tokens/requests

Step 1

Step Name

Model

Input Tokens

Output Tokens

Daily Requests

Step 2

Step Name

Model

Input Tokens

Output Tokens

Daily Requests

Step 3

Step Name

Model

Input Tokens

Output Tokens

Daily Requests

How to choose the right AI model

There are now 40+ AI models to choose from, each optimized for different tasks. ChatGPT is great for chat, but overkill (and expensive) for classification. Claude excels at reasoning, but might be slower for simple tasks. Gemini Flash is budget-friendly but may sacrifice quality.

Answer a few quick questions about your use case—latency needs, budget, quality threshold—and we'll rank models specifically for your problem. See the tradeoffs upfront before you commit.

Model choice impacts everything

•Latency: 50ms (Gemini Flash) vs 500ms (GPT-4o) — critical for real-time apps
•Cost: 10x difference between budget and premium models
•Quality: Reasoning models beat small models for complex tasks
•Context window: 200k tokens (Claude Pro) vs 4k (older models)
•Availability: Some models (o3, Grok) have rate limits or restricted access

🎯 Our recommendation: Start with Haiku or Gemini Flash for prototypes (fast, cheap). Upgrade to Sonnet or GPT-4o once you hit latency or quality walls.