AI Cost Calculators
6 tools🔢
Token Calculator
Count tokens for 30+ AI models in real time. See context window usage and input cost estimates for GPT-5, Claude 4, Gemini 2.5 and more.
Try it free →
📊
API Cost Calculator
Estimate your monthly AI API bill. Set requests/month, input and output tokens — see cost comparison across all major models instantly.
Try it free →
🖼️
AI Image Cost Calculator
Compare image generation pricing across DALL-E 3, Stable Diffusion, Midjourney and more. Calculate cost per image at scale.
Try it free →
📦
Batch API Calculator
Calculate savings with OpenAI's Batch API (50% discount). Compare real-time vs. batch costs for high-volume workloads.
Try it free →
🧮
Embedding Cost Calculator
Estimate the cost of embedding large datasets. Input document count and size — get cost breakdown for OpenAI, Cohere and other providers.
Try it free →
⚙️
Fine-Tuning Calculator
Estimate fine-tuning costs before you start training. Calculate training and inference costs based on dataset size and expected usage.
Try it free →
AI Model Reference
4 tools🏆
AI Benchmarks
Compare AI model performance across MMLU, HumanEval, MATH and other key benchmarks. Updated for 2026 models including GPT-5, Claude 4 and Gemini 3.
Explore →
🎯
AI Model Selector
Answer 5 questions about your use case and get a personalized model recommendation with reasoning. Find the right balance of speed, quality and cost.
Find your model →
📋
AI Subscription Comparison
Side-by-side comparison of ChatGPT Plus, Claude Pro, Gemini Advanced and other AI subscriptions. Features, prices, limits and best use cases.
Compare plans →
🪟
Context Window Visualizer
Visualize and compare context window sizes across AI models. Understand what 128K, 200K or 2M tokens actually means for your use case.
Visualize →
Developer Utilities
4 tools{}
JSON Formatter
Format, validate and minify JSON instantly. Syntax highlighting, error detection and one-click copy. Useful for API responses and config files.
Format JSON →
🔐
Base64 Encoder / Decoder
Encode text or files to Base64 and decode Base64 strings back to plain text. Supports UTF-8, binary data and file uploads.
Try it →
🔍
Regex Tester
Test regular expressions with live match highlighting. Supports all JS regex flags. See match groups, counts and replace output in real time.
Test regex →
⏱️
Cron Expression Generator
Build and validate cron job expressions with a visual interface. See human-readable schedule, next run times and copy-ready syntax.
Generate →
Writing & Content
2 tools✍️
Character Limit Checker
Check character and word counts against limits for Twitter/X, LinkedIn, Meta descriptions, Google Ads, SMS and more platforms at once.
Check limits →
📖
Readability Checker
Analyze text readability with Flesch-Kincaid, Gunning Fog and other scoring methods. Get grade level, reading time and improvement suggestions.
Analyze text →
Need More Than Free Tools?
PromptChief gives you a full prompt workspace — AI generator, prompt library, chain builder, benchmark runner and more.