OpenAI is an American artificial intelligence company based in San Francisco, established in December 2015. It develops the GPT family of language models, the o-series reasoning models, DALL-E and Sora for images and video, and Whisper for speech, and runs the ChatGPT assistant.
- Founded
- 2015
- Type
- Private company
- Founders
- Elon Musk, Sam Altman, Ilya Sutskever, Greg Brockman and Trevor Blackwell
- AI lab
- Inference provider
- 121 hosted endpoints
Model family
GPT
OpenAI GPT series of generative models.
Latest GPT models
Models in this family
52 catalogued models
52 models · 1–25
| Select models to compare | Model | Released | Context | Input /M | Output /M | Parameters | Type | I/O | Openness |
|---|---|---|---|---|---|---|---|---|---|
| GPT-6.1 TerraOpenAI | October 26, 2026 | 1.1M | $1.00 | $5.00 | — | Text | file, image, text → text | Closed | |
| GPT-6 Luna DecisionsOpenAI | October 6, 2026 | 1.1M | $0.10 | $0.00 | — | Decisions | text, image → decisions | Closed | |
| GPT-6.1 SolOpenAI | September 29, 2026 | 1.1M | $2.00 | $10.00 | — | Text | file, image, text → text | Closed | |
| GPT-6 LunaOpenAI | September 22, 2026 | 1.1M | $0.10 | $0.50 | — | Text | file, image, text → text | Closed | |
| GPT-6 SolOpenAI | September 22, 2026 | 1.1M | $2.00 | $10.00 | — | Text | file, image, text → text | Closed | |
| GPT-6 AstraOpenAI | September 4, 2026 | 1.1M | $10.00 | $50.00 | — | Text | file, image, text → text | Closed | |
| GPT-6 Astra (Fast)OpenAI | September 4, 2026 | 1.1M | — | — | — | Text | text, image, file → text | Closed | |
| GPT-5.6 CyberOpenAI | August 7, 2026 | 400K | — | — | — | Text | text, image → text | Closed | |
| GPT TranscribeOpenAI | July 28, 2026 | — | $75.00 | $0.00 | — | Transcription | audio → transcription | Closed | |
| GPT-5.6 LunaOpenAI | July 9, 2026 | 1.1M | $0.20 | $1.20 | — | Text | file, image, text → text | Closed | |
| GPT-5.6 SolOpenAI | July 9, 2026 | 1.1M | $4.40 | $22.00 | — | Text | file, image, text → text | Closed | |
| GPT-5.6 TerraOpenAI | July 9, 2026 | 1.1M | $2.00 | $12.00 | — | Text | file, image, text → text | Closed | |
| GPT-Realtime-2.1OpenAI | July 6, 2026 | 128K | — | — | — | Text, Audio | text, audio, image → text, audio | Closed | |
| GPT-5.5 InstantOpenAI | May 5, 2026 | 400K | — | — | — | Text | text, image, file → text | Closed | |
| GPT-5.5OpenAI | April 23, 2026 | 1.1M | $5.00 | $30.00 | — | Text | file, image, text → text | Closed | |
| GPT-5.5 ProOpenAI | April 23, 2026 | 1.1M | $30.00 | $180.00 | — | Text | file, image, text → text | Closed | |
| GPT-5.4 Image 2OpenAI | April 21, 2026 | 272K | $8.00 | $15.00 | — | Image, Text | image, text, file → image, text | Closed | |
| GPT-5.4 MiniOpenAI | March 17, 2026 | 400K | $0.75 | $4.50 | — | Text | file, image, text → text | Closed | |
| GPT-5.4 NanoOpenAI | March 17, 2026 | 400K | $0.20 | $1.25 | — | Text | file, image, text → text | Closed | |
| GPT-5.4OpenAI | March 5, 2026 | 1.1M | $2.50 | $15.00 | — | Text | text, image, file → text | Closed | |
| GPT-5.4 ProOpenAI | March 5, 2026 | 1.1M | $30.00 | $180.00 | — | Text | text, image, file → text | Closed | |
| GPT-5.3 Codex SparkOpenAI | February 5, 2026 | 128K | — | — | — | Text | text, image, file → text | Closed | |
| GPT-5.3-CodexOpenAI | February 5, 2026 | 400K | $1.75 | $14.00 | — | Text | text, image, file → text | Closed | |
| GPT-5.2OpenAI | December 11, 2025 | 400K | $1.75 | $14.00 | — | Text | file, image, text → text | Closed | |
| GPT-5.2 ChatOpenAI | December 11, 2025 | 128K | $1.75 | $14.00 | — | Text | file, image, text → text | Closed |