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Advanced AI Cost & Prompt Toolkit

Estimate request, embedding & fine-tuning costs, compare models and see how prompt design impacts your bill.

Select a provider to see available models.
Paste your real prompt if possible.

Detected: 0 words ≈ 0 tokens (approx.)

If unsure, 100–200 is typical for a chat reply.
For monthly cost projection.

We estimate tokens as 1 word ≈ 0.75 tokens. Actual usage depends on tokenizer and language.

Model cost comparison

Pick two models, paste a sample prompt and estimate which one gives you better price–performance.

Quick scenarios:

Cost & usage summary

Fill the form and click “Run comparison” to see detailed costs.

AI tools recommender & directory

Describe what you want to build and we’ll suggest AI tools. Then browse a directory of popular models and platforms.

We’ll suggest tools that fit this goal.
Rough budget level.
How comfortable are you with AI/dev tools?

This is a high-level assistant – always double-check each tool’s official docs and pricing.

Recommended tools
Top picks for your goal & budget

Choose a goal and click “Find tools” to see recommendations here.

AI tools directory

Browse popular AI platforms across chat, image, video, audio and writing – with rough pricing and best use cases.

Tool Type Best for Pricing (approx.) Notes
Price per 1K tokens.
We estimate tokens from this example.

Detected: 0 words ≈ 0 tokens (approx. per document)

How many documents will you embed?
For ongoing monthly cost.
Training & inference prices per 1K tokens (approx.).
Total words across all examples.
How many passes over the data.
For inference with the fine-tuned model.
Typical completion length.
For ongoing inference cost.

Upload a plain text file (.txt, .md, .json, .csv) to estimate tokens and potential chat + embedding cost.

For approximate monthly cost.

Prompt optimizer

Paste your prompt, pick a model and see how much you could save by tightening the wording.

Optimization result

We’ll estimate tokens, monthly cost and potential savings here.

Supported models & prices

Prices are approximate per 1K tokens and based on public provider documentation. Always double-check before going to production.

Provider Model Type Input / 1K Output / 1K Context Notes

What AI Cost Lab actually does

AI Cost Lab is a practical toolkit for anyone who needs to understand and manage AI model costs. Instead of long blog posts, we give you calculators and comparisons you can actually use:

  • Estimate the cost of a single request, a full project or a SaaS product.
  • Compare GPT-5, Gemini 2.5, Claude 3.5, Mistral and other models on real scenarios.
  • See how embeddings, fine-tuning and file analysis impact your bill.
  • Discover AI tools for chat, images, video, audio and writing that match your budget.

Every calculator on this page is designed for real-world questions developers and founders have when building products on top of AI APIs.

FAQ about AI costs

How accurate are these cost estimates?

We use official token prices from providers and simple token estimates. Real costs can vary depending on your exact prompts and outputs, but this should get you within the right order of magnitude.

Do you store my prompts or files?

No. All calculations run in your browser. We only collect anonymous analytics such as page views, unless you contact us manually.

Which models are supported?

We currently support GPT-5, GPT-4o, Gemini 2.5, Claude 3.5, Mistral and a few specialised tools. We add new models as pricing becomes stable.

Who is AI Cost Lab for?

Developers, SaaS founders, agencies and anyone who needs to explain or justify AI costs to clients or teams.

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