Question 1

How much does GPT-OSS 20B cost?

Accepted Answer

GPT-OSS 20B costs $0.075 per 1 million input tokens and $0.3 per 1 million output tokens. This pricing is set by OpenAI.

Question 2

What tokenizer does GPT-OSS 20B use?

Accepted Answer

GPT-OSS 20B 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-OSS 20B's context window?

Accepted Answer

GPT-OSS 20B supports a context window of 131K tokens (131,072 tokens). The maximum output length is 33K tokens.

Question 4

How does GPT-OSS 20B compare to other models?

Accepted Answer

You can compare GPT-OSS 20B'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-OSS 20B?

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-OSS 20B using the o200k_base tokenizer.

Model	Input / 1M	Output / 1M	Context	Max Output
GPT-OSS 20B	$0.075	$0.3	131K	33K
GPT-5 Nano	$0.05	$0.4	128K	16K
Gemini 2.0 Flash-Lite	$0.075	$0.3	1.0M	8K
Llama 4 Scout	$0.08	$0.3	1.0M	16K

GPT-OSS 20B Token Counter & Pricing

Count Tokens

Pricing Details

Compare GPT-OSS 20B with Similar Models

Frequently Asked Questions

Related Models