OpenAI · released 2025-09open
GPT-OSS 20B
OpenAI's open-weights return.
context
128K
output max
8K
input /M
$0.15
output /M
$0.60
modalities
T
Verdict
What it's actually good at
Strengths
- +Single-GPU inference
- +Open weights
- +Cheap on hosts
Weaknesses
- −Below flagship quality
- −No vision
Our scores
reasoning
7.0
coding
7.0
writing
7.0
speed
9.0
value
10.0
OpenAI's open-weights release. Runs on a single GPU, surprisingly capable, and finally free to self-host.
Pricing
Cost at common volumes
| Monthly volume | Input | Output | Est. monthly |
|---|---|---|---|
| Side project | 1M tok | 0.3M tok | $0.33 |
| Growing app | 50M tok | 15M tok | $16.50 |
| Production | 500M tok | 150M tok | $165.00 |
| Scale | 5000M tok | 1500M tok | $1650.00 |
Estimates assume uncached input. Prompt caching and batch APIs can cut this by 50–90% for many workloads. Use the calculator →
Head-to-head