GPT OSS 20B

Aug 2025
GPT OSS 20B
Compare in
on
—per task?
$0.018 / $0.09per 1M in / out?
—output speed?
131Kcontext

Run it yourself

estimate
Fits on✗ 8 GB (phone, laptop)✓ 16 GB · compressed✓ 24 GB GPU · 8-bit✓ 48 GB GPU · full quality✓ 80 GB GPU · full quality
LicenceApache-2.0free for commercial use

Benchmarks

in Chat & Knowledge

FAQ

How much does GPT OSS 20B cost?›

$0.018 per 1M input tokens and $0.09 per 1M output tokens (cheapest host: Darkbloom).

Is GPT OSS 20B free to use?›

There is no free API; the cheapest paid price is $0.018 per 1M input tokens. The weights are open, so you can run it yourself.

How good is GPT OSS 20B, and what is it best at?›

#174 of 334 in Chat & Knowledge, #75 of 132 in Coding, #131 of 133 in Agents & Tool Use, #165 of 195 in Writing & Language, #106 of 133 in Vision & Documents.

Is GPT OSS 20B better than GPT-4o?›

On MMLU-Pro · official board, GPT OSS 20B scores 73.1 vs 74.7 — lower.

How can I use GPT OSS 20B?›

Through the API of AWS Bedrock, AkashML, Amazon Bedrock, CoreWeave, Darkbloom and 7 more.

What is the context window of GPT OSS 20B?›

131K tokens.

When was GPT OSS 20B released? Is there a newer version?›

Released 2025-08-05. It is the current version in its line.

Is GPT OSS 20B open source?›

Yes, the weights are open (Apache-2.0 licence).

Can I run GPT OSS 20B locally?›

The weights are open and can be self-hosted; hardware needs are not confirmed yet.

Can GPT OSS 20B read images?›

No, it accepts text only.

What is GPT OSS 20B?›

GPT OSS 20B is an open-weights language model from OpenAI, released Aug 2025.

What are the best alternatives to GPT OSS 20B?›

Gemini 3.1 Pro (better), QwQ 32B (open weights).