AI Context Window Calculator
Check if your document fits within AI model context limits. Calculate chunking needs for large documents.
Estimated Token Count
7K tokens
5000 words
| Model | Provider | Context Window | Utilization | Fits? | Max Output | Chunks Needed |
|---|---|---|---|---|---|---|
| GPT-4o | OpenAI | 128K | 5% | Yes | 122K | 1 |
| Claude Haiku 3.5 | Anthropic | 200K | 3% | Yes | 194K | 1 |
Context Window Tips
Gemini 1.5 Pro: 1M tokens = entire books in one request
Claude: 200K tokens = long documents, good for analysis
GPT-4o: 128K tokens = standard long context
Chunking: Split at paragraph/section boundaries for coherence
Document Size Reference
Email
~100-500 words
~200-700 tokens
Article
~2,000-5,000 words
~3K-7K tokens
Book Chapter
~10,000-20,000 words
~15K-30K tokens
Full Book
~80,000-100,000 words
~100K-130K tokens