Seif Amara
Senior Industry Researcher & Content Specialist · 8+ years experience
Biography
Seif Amara is a software developer and researcher who has spent over eight years working with language models, developer tooling and API cost optimization. He built AI Token Calculator after repeatedly needing to answer the same question for his own projects: how many tokens is this prompt, and what will it actually cost across providers?
His work focuses on making LLM pricing and tokenization legible to developers and founders. Every price on this site is verified against an official provider source and timestamped, and every tokenization claim is tested against the real tokenizer where one is available in the browser.
Seif writes the guides on this site and maintains the pricing data pipeline. When he is not re-checking provider pricing pages, he is building small, fast tools that respect user privacy by running entirely in the browser.
Credentials
- 8+ years working with language models and developer tooling
- Maintains a source-backed pricing dataset covering 140+ models across 13 providers
- Author of the token counting and cost methodology used across this site
Areas of expertise
- LLM API pricing and cost optimization
- Tokenization (BPE, o200k, cl100k) and context windows
- Prompt engineering and token reduction
- AI SaaS and chatbot cost modeling
- Static-site performance and privacy-first tooling
Published articles
- What is a token?
- How many tokens is 1000 words?
- LLM pricing explained
- Input, output and cached tokens explained
- Context window vs max output
- How to reduce prompt tokens
- Prompt caching guide
- Token optimizer toolkit
- RAG cost guide
- AI chatbot cost guide
- How to count tokens in a PDF
See all guides.