AI Token Calculator
Paste your prompt and instantly compare token counts and costs across 15 AI models — including GPT-5.6, Claude 5, and Gemini 3.1.
Your Prompt / Text
How token cost is calculated
Cost Comparison — 15 Models
Sorted cheapest firstInput cost = cost to send your prompt. Output cost = cost per response of the same length. Real output length will vary.
Paste your text above to see costs across all models
Which model should I use?
Price alone doesn't tell you which model fits your task. Use this as a starting point, then verify against the provider's own benchmarks for anything decision-critical.
| Model | Best for |
|---|---|
| GPT-5.6 Sol | Frontier reasoning, native computer use, complex multi-step work |
| Claude Fable 5 | Anthropic’s top tier — long-context analysis, nuanced writing |
| Claude Opus 5 | Complex reasoning and code at a lower price than Fable 5 |
| Gemini 3.1 Pro | Leads on GPQA Diamond and SWE-bench for its price tier — research, science, agentic coding |
| GPT-5.6 Terra | Balanced quality and cost for everyday reasoning tasks |
| Claude Sonnet 5 | Balanced quality + cost — the model answering most day-to-day work |
| Gemini 3.6 Flash | Fast, multimodal, high-volume production traffic |
| DeepSeek V4 Pro | Strong reasoning and coding at a fraction of frontier pricing |
| Claude Haiku 4.5 | Fast responses for simple, high-volume tasks |
| Grok 4 Fast | Low-latency, low-cost tasks that don’t need frontier reasoning |
| Llama 4 Scout | Open-weight option for self-hosting or fine-tuning |
| GPT-5.6 Luna | OpenAI’s cheapest tier — high-throughput, budget-sensitive workloads |
| DeepSeek V4 Flash | Cheapest reasoning-capable option for simple tasks at scale |
| Amazon Nova Lite | AWS-native, cost-effective for straightforward tasks |
| Amazon Nova Micro | Ultra-low cost — classification, extraction, simple lookups |
Frequently asked questions
How is the token count calculated?
Using the standard approximation of ~4 characters per token, the same method OpenAI, Anthropic, and Google use for estimates. Actual tokenization varies slightly by model, but this gives a reliable estimate.
Is this an exact cost or an estimate?
It's an estimate. Input cost is calculated directly from your text. Output cost assumes a response of the same length as your input — actual response length varies by prompt and model.
Is my text sent to a server?
No. All token counting and cost calculation happens entirely in your browser using JavaScript. Nothing is sent anywhere.
How current is the pricing data?
Pricing reflects each provider's published rates as of August 2026. Model pricing changes frequently — verify against the provider's own pricing page before using these figures for budgeting decisions.