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AI models

Codex

Training compute
7.3×10²² FLOP
Parameters
12B
Published
Jul 7, 2021

Codex is an AI model developed by OpenAI (United States), first published in July 2021. It works in the language domain, on tasks such as code autocompletion.

Training it took an estimated 7.3×10²² FLOP of compute. The model has 12,000,000,000 parameters. It was trained on roughly 52.8B datapoints.

Access: API access. Its weights are not openly released. It is built on top of GPT-3 13B. The reference paper has 9,577 citations. Epoch AI rates the confidence of this record as likely.

Full record
Organization
OpenAI
Country of organization
United States
Domain
Language
Task
Code autocompletion
Training compute
7.3×10²² FLOP
Parameters
12,000,000,000
Dataset size
52.8B
Model accessibility
API access
Open weights
No
Base model
GPT-3 13B
Citations
9,577
Epoch confidence
Likely
More from OpenAI
SourceEpoch AI, 'AI Models'. Published online at epoch.ai. Retrieved 2026-07-29 from https://epoch.ai/data/ai-models. Licensed under CC BY 4.0.
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