Question 1

How much does GPT-5.4 Mini cost?

Accepted Answer

GPT-5.4 Mini costs $0.75 per 1 million input tokens and $4.5 per 1 million output tokens. This pricing is set by OpenAI.

Question 2

What tokenizer does GPT-5.4 Mini use?

Accepted Answer

GPT-5.4 Mini uses the o200k_base tokenizer. This is OpenAI's latest tokenizer, optimized for efficiency with a vocabulary of ~200,000 tokens.

Question 3

What is GPT-5.4 Mini's context window?

Accepted Answer

GPT-5.4 Mini supports a context window of 400K tokens (400,000 tokens). The maximum output length is 128K tokens.

Question 4

How does GPT-5.4 Mini compare to other models?

Accepted Answer

You can compare GPT-5.4 Mini's pricing and capabilities against other LLMs in the comparison table above, or visit the full pricing page for a side-by-side view of all models.

Question 5

How do I count tokens for GPT-5.4 Mini?

Accepted Answer

Use the token counter at the top of this page or visit the homepage calculator. Paste your text and it will show the exact token count and cost for GPT-5.4 Mini using the o200k_base tokenizer.

Model	Input / 1M	Output / 1M	Context	Max Output
GPT-5.4 Mini	$0.75	$4.5	400K	128K
o4 Mini	$1.1	$4.4	200K	100K
GLM-5 Turbo	$1.2	$4	200K	128K
Claude Haiku 3.5	$0.8	$4	200K	8K

GPT-5.4 Mini Token Counter & Pricing

Count Tokens

Pricing Details

Compare GPT-5.4 Mini with Similar Models

Frequently Asked Questions

Related Models