AI cost calculators

Seventeen calculators covering the costing questions that come up repeatedly when you build with AI. Each one runs entirely in your browser against the price index, which is re-verified from vendor pricing pages every week. None of them send your inputs anywhere.

LLM API costs

Price a feature and see what a request actually costs.

LLM API cost calculatorPrice an LLM feature per month across 29 models from OpenAI, Anthropic, Google, Mistral and DeepSeek, with caching and batch discounts included. Token estimator and cost checkerPaste any text and estimate its token count, then see what it costs to send through 27 different LLM APIs. Runs entirely in your browser — nothing is uploaded. AI chatbot cost calculatorPrice an AI chat feature including the history you resend every turn. Compare full history, sliding window and rolling summary side by side. Context window cost calculatorCheck whether your document fits a model's context window, what a full-context call costs, and at what query volume retrieval becomes cheaper than stuffing. AI agent cost calculatorPrice a coding assistant or tool-using agent that loops over many steps, across every model — including the context that re-accumulates on every step. Reasoning token cost calculatorReasoning models bill hidden thinking tokens at the full output rate. Price a request with its reasoning budget across every model and see the reasoning tax on each.

Cut your bill

What caching, batching and model choice save you.

Prompt caching savings calculatorFind out how much prompt caching actually saves on your workload, and the hit rate you need before the cache-write premium pays for itself. Batch API savings calculatorSee exactly what the 50% batch discount is worth on your workload, and how much of your traffic can tolerate the asynchronous turnaround. Model switch savings calculatorPrice your current workload on your current model, then on every alternative, and see exactly what a migration would save or cost per year. Fine-tuning vs prompting cost calculatorFine-tuning buys a shorter prompt. Work out how many requests it takes for those saved tokens to repay the training run and the higher inference rate.

Build vs buy

Compare running it yourself against paying per token.

Self-hosting vs API break-even calculatorCompare renting a GPU to serve an open-weight model against paying per token, including utilisation, redundancy and the ops time nobody budgets for. RAG pipeline cost calculatorPrice a retrieval-augmented generation pipeline end to end: initial embedding, re-embedding on updates, vector storage and the generation cost of every query. AI subscription vs API cost calculatorCompare paying per seat for AI assistants against building on the API directly, and find the team size where the answer flips.

Media, speech & ROI

Images, video, audio and whether it all pays off.

AI image and video generation cost calculatorPrice a generative image or video pipeline across Imagen, FLUX, Stable Diffusion, Veo, Kling, Luma and Runway — including the retries nobody budgets for. Speech-to-text and text-to-speech cost calculatorPrice transcription and synthetic voice at your volume across OpenAI, Deepgram, AssemblyAI, Google and ElevenLabs, with the real cost per hour of audio. Voice AI cost calculatorPrice a voice agent end to end — speech-to-text, an LLM, and text-to-speech — as one cost per conversation and per month, with the three-way split. AI ROI calculatorTurn hours saved into money, subtract what the tooling costs, and get a payback period with a sensitivity range instead of a single optimistic number.

How to choose one

If you are pricing a feature that calls an LLM, start with the LLM API cost calculator — it prices your workload against every model in the index at once and shows you the spread you are choosing within. If you already know which model you are using and want to find savings, the model switch savings calculator and the prompt caching savings calculator are the two highest-yield places to look.

For architecture decisions rather than pricing ones, the context window cost calculator and the RAG cost calculator answer the same question from opposite directions, and the self-hosting vs API calculator settles the one that generates the most arguments.

Every calculator has a full explainer beneath it covering what it models, what it deliberately leaves out, and the judgement you still have to make. The methodology page documents the conversions used throughout.