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Paste text to instantly count tokens, words, and characters for any GPT model
Compare context windows, max output lengths, and API pricing across all major LLM providers.
| Model | Provider | Context Window | Max Output | Price (Input / Output per 1M tokens) |
|---|---|---|---|---|
| GPT-5.5 | OpenAI | 1M tokens | 32,768 tokens | See openai.com/pricing |
| GPT-5.5 pro | OpenAI | 1M tokens | 32,768 tokens | See openai.com/pricing |
| GPT-5.4 | OpenAI | 1M tokens | 32,768 tokens | See openai.com/pricing |
| GPT-5.4 pro | OpenAI | 1M tokens | 32,768 tokens | See openai.com/pricing |
| GPT-5.4 mini | OpenAI | 1M tokens | 16,384 tokens | See openai.com/pricing |
| GPT-5.4 nano | OpenAI | 1M tokens | 16,384 tokens | See openai.com/pricing |
| GPT-5 mini | OpenAI | 1M tokens | 16,384 tokens | See openai.com/pricing |
| GPT-5 nano | OpenAI | 1M tokens | 16,384 tokens | See openai.com/pricing |
| GPT-5 | OpenAI | 1M tokens | 32,768 tokens | See openai.com/pricing |
| GPT-4.1 | OpenAI | 1M tokens | 32,768 tokens | See openai.com/pricing |
| Claude Opus 4.8 | Anthropic | 1M tokens | 32,000 tokens | $5.00 / $25.00 |
| Claude Sonnet 4.6 | Anthropic | 1M tokens | 8,192 tokens | $3.00 / $15.00 |
| Claude Haiku 4.5 | Anthropic | 200K tokens | 8,192 tokens | $0.80 / $4.00 |
| Gemini 3.1 Pro | 1M tokens | 64,000 tokens | $2.00 / $12.00 | |
| Gemini 3 Flash | 1M tokens | 65,535 tokens | $0.50 / $3.00 | |
| Gemini 3.1 Flash-Lite | 1M tokens | 65,536 tokens | $0.25 / $1.50 |
Prices from official provider pricing pages as of March 2026. Some prices shown as "See pricing page" due to frequent updates - check openai.com/pricing, docs.anthropic.com/pricing, and ai.google.dev/pricing for latest rates. Note: GPT-4o, o3, o4-mini, and earlier models were retired in February 2026; GPT-5.5, GPT-5.4, GPT-5, and GPT-4.1 are the current OpenAI models. Token estimates use average ratios (~0.75 tokens/word for OpenAI/Google, ~0.80 for Anthropic).
Approximately 750 tokens for OpenAI models (GPT-5.5, GPT-5.4, GPT-4.1) and 800 tokens for Anthropic models (Claude). The exact count varies based on word length, punctuation, and special characters.
GPT-5.5, GPT-5.4, GPT-4.1, Claude Opus 4.8, and Gemini 3.1 Pro all support 1 million tokens of context. 1 million tokens is roughly equivalent to 750,000 words or a 1,500-page book.
ChatGPT has a fixed context window. When your conversation exceeds the token limit, older messages are dropped. Use AI Toolbox (formerly ChatGPT Toolbox) to search and export important conversations before they're lost.
Be concise in prompts, avoid repeating context, use system instructions for persistent rules, and break long tasks into separate conversations. AI Toolbox's Prompt Library helps you save optimized prompts for reuse on ChatGPT, Gemini, and Claude.
This tool provides estimates based on average token-per-word ratios. For exact counts, use OpenAI's tiktoken library (Python) or the Anthropic tokenizer API. Our estimates are within 5-10% of actual counts for English text.
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