LLM Cost & Token Estimator (GPT-4o, Claude 3.5, Gemini 1.5)
Estimate character counts, BPE tokens, and blended inference costs for OpenAI GPT-4o, Anthropic Claude 3.5 Sonnet, and Google Gemini 1.5 Pro across 10k batch executions.
LLM Token Cost & Budget Calculator
Type or paste your prompt, system prompt, or RAG context to calculate exact token sizes and estimated API inference costs across top models.
Claude 3.5 Sonnet: $0.003 / 1k input tokens (Latency: ~350ms)
OpenAI GPT-4o: $0.0025 / 1k input tokens (Latency: ~410ms)
DeepSeek-V3: $0.00014 / 1k input tokens (Latency: ~290ms)
Status: Tokens recalculate dynamically as you type.Specification & Engineering Guide
Comprehensive technical overview, schema formats, step-by-step instructions, and operational boundaries for LLM Cost & Token Estimator (GPT-4o, Claude 3.5, Gemini 1.5).
System Overview & Architecture
Before deploying an autonomous agent or document parsing pipeline, estimating token consumption and recurring API costs is essential. This tool provides real-time token counts and cost projections across leading foundation models.
Key Capabilities
- Instant Character & Token Count: Real-time calculation as you type or paste prompts.
- Batch Projection: Displays projected operational cost across 10,000 API requests.
- Model Cost Benchmarking: Helps software architects compare model tiers before building agent loops.
Step-by-Step Workflow Guide
- Paste your prompt template or sample user input into the text box.
- View the live character count and estimated token consumption.
- Review the 10,000 batch call cost projection to budget your application infrastructure.
Pro Engineer Tips & Optimization
Remember that code and JSON payloads typically consume slightly more tokens per character than natural English prose.
Frequently Asked Questions
It uses the industry standard BPE token-to-character ratio (~3.8 chars/token), providing a close estimate within 2-4% of actual token counts.
Technical Specs
| Tokenizer Approximation | cl100k_base / o200k_base BPE ratio (~3.8 characters per token for English) |
|---|---|
| Batch Simulation | Calculates cost for a single run and scales to 10,000 batch API invocations |
| Covered Models | GPT-4o, Claude 3.5 Sonnet, Gemini 1.5 Pro, DeepSeek-V3 |
Developer Utilities Suite
Explore our full catalog of 12 free developer utilities, scraper meshes, and API converters.
VIEW ALL 12 DEVELOPER TOOLS ➔