Question 1

How much does the GPT-5.4 API cost?

Accepted Answer

GPT-5.4 costs $2.50 per million input tokens and $10.00 per million output tokens as of May 2026. The mini version costs $0.40/$1.60 and nano costs $0.10/$0.40 per million tokens.

Question 2

How much does the Claude API cost?

Accepted Answer

Claude Opus 4.6 costs $5.00/$25.00 per million tokens (input/output). Claude Sonnet 4.6 costs $3.00/$15.00, and Claude Haiku 4.5 costs $1.00/$5.00 per million tokens as of May 2026.

Question 3

What is the cheapest AI API in 2026?

Accepted Answer

The cheapest AI APIs in 2026 are GPT-5.4 nano ($0.10/$0.40 per MTok), Llama 4 Maverick ($0.15/$0.60), and DeepSeek V3 ($0.27/$1.10). For most tasks, these budget models perform comparably to premium options.

Question 4

What is a token in AI?

Accepted Answer

A token is a chunk of text that AI models process. In English, 1 token equals approximately 4 characters or 3/4 of a word. A 1,000-word document uses roughly 1,300 tokens. You pay for both input tokens (what you send) and output tokens (what the AI generates).