Skip to content
AI Tool

How Fast Is AI Review

How Fast Is AI is an online tool designed to measure and compare the generation speed and cost of various AI models for everyday tasks.

shipped Aug 28, 2026productivityfreemium
productivity
How Fast Is AI — product screenshot

Why it matters

1Measures AI model speed in 'words per second' (wps) rather than tokens per second, providing a human-centric metric.
2Tracks 'thinking delay' (time to first token) to assess perceived responsiveness, with under 500 ms feeling like a live conversation.
3Compares AI models like Claude and ChatGPT across tasks such as writing, reading, solving, coding, and editing.
4Offers a freemium pricing model, allowing users to access core comparison features with paid options for extended functionality.

About How Fast Is AI

Platforms
Web
Target Audience
Individuals seeking to understand and compare the performance of AI models across different tasks.

overview

What is How Fast Is AI?

How Fast Is AI is a AI model comparison tool developed by How Fast Is AI that enables individuals, developers, and businesses to compare different AI models based on their performance in various tasks like writing, reading, solving, coding, and editing. It allows users to see how fast different models work and track their accuracy in real-time, focusing on human-perceptible metrics such as words per second and thinking delay.

features

Key Features of How Fast Is AI

How Fast Is AI provides a suite of features designed to offer transparent and real-time comparisons of AI model performance, focusing on metrics relevant to user experience and practical application.

  • Real-time AI model speed comparison in words per second (wps).
  • Measurement of 'thinking delay' (time to first token) for responsiveness assessment.
  • Tracking of AI model accuracy across tasks like writing, reading, solving, coding, and editing.
  • Transparent cost comparisons for various AI models and tasks.
  • User-friendly interface for selecting tasks and initiating comparisons.
  • Detailed reporting on AI performance metrics.
  • Comparison of models such as Claude versions (Haiku, Sonnet, Opus, Fable) and ChatGPT.

use cases

Who Should Use How Fast Is AI?

How Fast Is AI is designed for a diverse audience seeking empirical data on AI model performance, enabling informed decision-making for both personal and professional applications.

  • Individuals evaluating AI models for personal use, such as writing emails or summarizing information.
  • Developers comparing AI performance for integration into applications, focusing on speed and cost efficiency.
  • Businesses assessing AI solutions for specific operational needs, like data analysis or code debugging.
  • Users curious about the real-time speed and cost implications of different AI models.
  • Content creators and editors needing to proofread content or generate text efficiently.

how to use

How to Use How Fast Is AI

To utilize How Fast Is AI, users navigate to the web platform, select desired AI models and tasks, and initiate real-time performance comparisons.

  • 1Access the How Fast Is AI platform via a web browser at howfastai.com.
  • 2Select specific AI models for comparison (e.g., Claude, ChatGPT).
  • 3Choose from a range of everyday tasks such as writing, reading, solving, coding, or editing.
  • 4Initiate a 'race' to observe real-time speed and accuracy metrics.
  • 5Review detailed reports on words per second, thinking delay, and cost comparisons.
  • 6Utilize the data to make informed decisions on AI model selection.

pricing

How Fast Is AI Pricing & Plans

How Fast Is AI operates on a freemium model, offering core comparison functionalities for free with additional features or extended usage available through paid options. Specific pricing tiers and their associated costs are not publicly detailed beyond the freemium designation.

  • Freemium: Free access to basic AI model comparison and performance tracking.

Pros

  • +Provides human-centric speed metrics (words per second) for practical understanding of AI output.
  • +Measures 'thinking delay' (time to first token), crucial for assessing perceived responsiveness in interactive AI applications.
  • +Offers real-time, in-browser comparisons of various AI models, including Claude and ChatGPT.
  • +Tracks both speed and accuracy across a range of everyday tasks like writing, coding, and editing.
  • +Includes transparent cost comparisons, aiding in informed decision-making for AI model selection.
  • +Methodology is regularly updated, with the last update on August 20, 2026, indicating ongoing refinement.

Cons

  • Specific details on paid tiers and their associated costs are not extensively publicized beyond the 'freemium' designation.
  • Lacks specific user reviews or testimonials directly for the howfastai.com tool in available search results.
  • Focus on generation speed and perceived latency may not cover all aspects of AI model evaluation, such as advanced reasoning or complex task completion benchmarks.
  • As an online tool, performance measurements can be influenced by user-specific network latency and browser conditions.

Similar Tools

How Fast Is AI vs Competitors

How Fast Is AI distinguishes itself in the competitive landscape by focusing on human-centric speed metrics and real-time, in-browser measurements, providing a practical perspective on AI model performance.

1

It allows users to benchmark various LLMs on their specific prompts and use cases, providing data on accuracy, cost, speed, and stability.

OpenMark offers a similar interactive benchmarking experience to How Fast Is AI, focusing on custom tasks and providing detailed metrics. While it has a free trial, it transitions to a pay-as-you-go model, similar to How Fast Is AI's freemium approach.

2
AI Model Comparison Tool (by Evalaistack)

This free tool enables side-by-side comparison of multiple AI models using the same prompt and parameters, focusing on cost, latency, and practical response behavior.

This tool is explicitly free and provides a direct comparison of models based on user-defined prompts, including latency and cost, which aligns closely with How Fast Is AI's functionality. It might offer less in-depth accuracy tracking compared to How Fast Is AI's real-time accuracy metrics.

3
Hugging Face Inference Benchmarker

It is an open-source command-line tool designed for developers to benchmark the real-world performance, throughput, and efficiency of text generation models and inference servers.

As an open-source, command-line tool, it offers deep technical control over benchmarking your own models and servers, which is a trade-off from the more user-friendly, hosted web interface of How Fast Is AI. It requires a different workflow and technical setup.

4
MultipleChat

It allows users to send the same prompt to several AI models simultaneously and compare their generated responses side-by-side in one interface.

MultipleChat excels at comparing the qualitative outputs of different AI models for the same prompt, which is a key aspect of 'accuracy' in How Fast Is AI. However, it may not provide the same explicit real-time speed or detailed quantitative performance metrics that How Fast Is AI emphasizes.

More on Stork

Related AI Tools

Other tools in this category, matched by shared tags

One short daily email of tools worth shipping. No drip funnel.

one email a day · unsubscribe in two clicks · no third-party tracking

For builders

This page is doing a job for someone else’s tool.

AI agents read it. Buyers land on it. It answers in eight languages and over MCP. Your tool can have one like it — live in 24 hours.