Developer Tools

Context Window Visualizer

See how your prompt fills different LLM context windows. Compare Claude, GPT-4o, Gemini across 9 models.

Claude Haiku 4.50 / 200,000 · 0.0%

Claude Sonnet 4.60 / 200,000 · 0.0%

Claude Opus 4.80 / 200,000 · 0.0%

GPT-4o0 / 128,000 · 0.0%

GPT-4o mini0 / 128,000 · 0.0%

Gemini 2.5 Pro0 / 1,000,000 · 0.0%

Gemini 2.5 Flash0 / 1,000,000 · 0.0%

Llama 3.3 70B0 / 128,000 · 0.0%

Mistral Large 20 / 128,000 · 0.0%

Token count is approximate — uses a heuristic similar to BPE. Actual counts vary by model tokenizer.

guide

LLM Context Windows Explained: How to Check if Your Prompt Fits

Understand LLM context windows, compare token limits across 9 models, and learn strategies for handling prompts that exceed the context limit.