What is a token in AI? How LLMs split text into tokens, words-per-token rules from OpenAI, Google, Anthropic and DeepSeek docs, input vs output tokens and a cost calculator.
OpenRouter pricing checked 13 Nov 2026: 5.5% Standard and 8% Business credit fees, free model limits, BYOK rules, model list prices, and how to create and cap an API key.
LLM API pricing comparison checked 13 Nov 2026: GPT-6, Claude 5.5, Gemini 4, Mistral Large 4, DeepSeek V4 per-1M-token prices, plus OpenRouter, Together and Groq.
