LLM Calculators

AI & LLM Cost Calculators

Know what AI costs before you build.

A free LLM pricing comparison tool for developers and teams evaluating AI API costs. Enter your expected usage to compare ChatGPT API cost against Claude, Gemini, Mistral, and every other major model side by side. No account required — results are instant.

66

Models Tracked

9

Providers

LLM Pricing Comparison

Token Calculator

Count tokens in text and compare processing costs across all major LLM API providers.

Pricing Comparison

Compare API pricing across all major LLM models in one sortable, filterable table.

Cost Estimator

Estimate monthly and annual AI API costs based on your usage pattern.

Model Selector

Answer a few questions to get a personalized AI model recommendation.

Token ↔ Words

Convert between LLM tokens and words instantly.

Context Windows

Visual comparison of context window sizes across all major LLM models.

Fine-Tuning

Estimate LLM fine-tuning costs and calculate the break-even point.

Fine-Tuning Cost

Quick GPT and LLM fine-tuning training cost estimate from tokens and epochs.

Image Costs

Compare AI image generation costs across providers.

Embeddings

Calculate vector embedding costs for your document corpus.

Batch Pricing

Compare standard vs batch API pricing and calculate savings.

Batch API Cost

Estimate OpenAI Batch API savings vs standard API at your request volume.

Quick Pricing Snapshot

ModelProviderInput/1MOutput/1M
GPT-5.5OpenAI$5.00$30.00
Claude Opus 4.7Anthropic$5.00$25.00
Gemini 3.1 ProGoogle$2.00$12.00
Grok 4.3xAI$1.25$2.50
DeepSeek V4 ProDeepSeek$1.74$3.48
Mistral Medium 3.5Mistral$1.50$7.50
Nova 2 ProAmazon$1.25$10.00
Command ACohere$2.50$10.00
Grok Build 0.1xAI$1.00$2.00
GPT-5.5 ProOpenAI$30.00$180.00
View full pricing comparison →

Why Use LLM Calculators?

AI model pricing is fragmented across dozens of provider pages, with different units, tiers, and discount structures. LLM Calculators brings all of this into one place with interactive tools that give you personalized answers based on your specific usage patterns. Whether you are estimating the cost of a new chatbot, comparing models for a RAG pipeline, or budgeting your AI infrastructure spend for the quarter, these tools give you the numbers you need in seconds.

How Our Data Stays Current

All pricing data on LLM Calculators is sourced directly from official provider pricing pages. We track pricing changes across OpenAI, Anthropic, Google, xAI, DeepSeek, Meta, and Mistral. When a provider updates their pricing or launches a new model, our data is updated to reflect the change. Every page displays a last-updated timestamp so you always know how fresh the data is.

Frequently Asked Questions

How accurate is the pricing data on LLM Calculators?
All pricing is sourced from official provider pricing pages and verified regularly. We display a last-updated date on every page. If you notice outdated pricing, please contact us and we will update it immediately.
Which AI model providers do you cover?
LLM Calculators covers all major LLM API providers: OpenAI (GPT series), Anthropic (Claude Opus, Sonnet, Haiku), Google (Gemini 3.1 Pro, Gemini 3 Flash, Gemini 2.0 Flash Lite), xAI (Grok 4.1), DeepSeek (R1, V3), and Mistral (Large, Small).
Is LLM Calculators free to use?
Yes, all calculators and comparison tools are completely free with no signup required. All calculations run locally in your browser — we never charge for usage.
How often is the pricing data updated?
We check official provider pricing pages weekly and update our data whenever changes are detected. Major model launches and pricing changes are typically reflected within 24-48 hours.
What is the cheapest LLM API available in 2026?
the cheapest LLM APIs by input token price are Gemini 2.0 Flash Lite at $0.08 per million tokens, GPT-5 nano at $0.05 per million tokens, and Mistral Small at $0.10 per million tokens. The best value depends on your specific use case — use our Model Selector tool to find the right fit.
What is an LLM cost calculator?
An LLM cost calculator estimates the API cost of running a large language model workload. It takes your expected token volume — input tokens (your prompts) and output tokens (the model's responses) — and multiplies them by each model's per-token price to produce a total cost in dollars. This lets developers and product teams compare costs across providers like OpenAI, Anthropic, Google, and Mistral before committing to a model.
Which AI model has the lowest API cost?
The lowest-cost models vary by use case. For general text generation, Gemini Flash and Claude Haiku are among the cheapest capable options at this tier. For embeddings, Voyage AI voyage-3-lite offers the lowest per-token price. For code generation, Codestral is one of the most cost-efficient options available. Use the pricing comparison table on this page to sort by input price and filter by category — the cheapest model for your workload depends on your specific input-to-output token ratio.
How do I calculate ChatGPT API cost?
ChatGPT API cost is calculated using this formula: (input tokens ÷ 1,000,000 × input price) + (output tokens ÷ 1,000,000 × output price) = total cost in dollars. All OpenAI models are priced per million tokens with separate rates for input and output. Use the cost estimator above to calculate your exact figure across all models simultaneously — enter your daily request volume and average token counts to get a monthly cost comparison.
What is a token in AI API pricing?
A token is the basic unit of text that language models process. In English, one token is approximately four characters or three-quarters of a word — so 1,000 tokens is roughly 750 words. All LLM API pricing is based on token counts, not characters or words. You are charged separately for input tokens (text you send to the model) and output tokens (text the model generates back). Longer prompts and longer responses cost proportionally more.
How much does LLM pricing vary across providers?
LLM API pricing varies by more than 400× between the cheapest and most expensive models for equivalent-quality output on some workloads. Budget models like Claude Haiku and Gemini Flash cost fractions of a cent per thousand tokens. Frontier models like GPT-4o and Claude Opus cost significantly more but deliver higher quality on complex reasoning tasks. The pricing comparison table above shows input price, output price, and context window for every model — sortable by any column.

Pricing data last verified against official provider pages. All calculations run locally in your browser. LLM Calculators is not affiliated with any AI model provider.