GPT-5.4
openai · 1.05M context
1,050,000 tokens remain for instructions and output.
LLM context window comparator
Compare context windows across LLMs and see whether a document or token budget fits before you send it to a model.
How to use this tool
- Select two or more models to compare.
- Paste a document or enter its token count.
- Check the fit result and the share of each model’s context window used.
Worked example: Example: a 120,000-token document fits inside a 200,000-token context window, leaving about 80,000 tokens for instructions and output.
Choose at least two models
Keep two selected so the comparison remains meaningful.
Document estimate0 tokens≈ 0 standard pages
Fits
Claude Sonnet 4.6
anthropic · 1M context
1,000,000 tokens remain for instructions and output.
Gemini 3.1 Pro Preview
gemini · 1M context
1,000,000 tokens remain for instructions and output.