Models
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Models
Foundation models and notable fine-tunes - closed frontier and open weights.
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Open weights
263
Closed weights
409
Provider:
Openai
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GPT-6 Luna
· OpenAI
Closed weights
22 Sep 2026
GPT-6 Sol
· OpenAI
Closed weights
22 Sep 2026
GPT-6 Astra
· OpenAI
Restricted
Closed weights
3 Sep 2026
GPT-5.6 Luna
· OpenAI
Restricted
Closed weights
26 Jun 2026
GPT-5.6 Sol
· OpenAI
Restricted
Closed weights
26 Jun 2026
GPT-5.6 Terra
· OpenAI
Restricted
Closed weights
26 Jun 2026
GPT-5.1
· OpenAI
Closed weights
13 Nov 2025
GPT-5
· OpenAI
Closed weights
Undisclosed (closed)
7 Aug 2025
o3
· OpenAI
Closed weights
Undisclosed (closed)
Apr 2025
InstructGPT
· OpenAI
Closed weights
1.3B, 6B, 175B (text-davinci-001/002 / text-davinci-003)
Jan 2022
OpenAI Codex (2021)
· OpenAI
Closed weights
12B (Codex-12B), with smaller 300M and 2.5B variants reported
Jul 2021