OpenAI

GPT-6.1 Sol

GPT-6 Sol and GPT-6 Luna

GPT-6 Astra

Initially limited to select organizations.

GPT-5.6 Sol

Limited preview from June 26, GA July 9.

GPT-5.5

API availability followed on April 24.

GPT-5.4 mini

GPT-5.4 (Thinking, Pro)

GPT-5.3-Codex

GPT-5.2

GPT-5.1

Sora 2

GPT-5-Codex

gpt-realtime

Speech-to-speech model.

GPT-5

gpt-oss-120b and gpt-oss-20b

First open-weight OpenAI LLMs since GPT-2.

o3-pro

gpt-image-1

o3 and o4-mini

GPT-4.1 (incl. mini, nano)

GPT-4.5

Research preview.

o3-mini