GPT models and ChatGPT by OpenAI
| Model | API ID | Release | Cutoff | Conf. | Status | Notes |
|---|---|---|---|---|---|---|
| GPT-5.6 | gpt-5.6 |
2026-07 | 2025-12 | low | preview | Preview — available to select trusted partners. Broad availability coming soon. |
| GPT-5.5 | gpt-5.5 |
2026-04 | 2025-12 | high | active | Flagship for complex reasoning and coding. Cutoff: Dec 1, 2025. 1M context, 128k output. $5/$30 per MTok. |
| GPT-5.4 | gpt-5.4 |
2026-02 | 2025-08 | high | active | Affordable model for coding/professional work. Cutoff: Aug 31, 2025. 1M context, 128k output. $2.50/$15 per MTok. |
| GPT-5.4 mini | gpt-5.4-mini |
2026-02 | 2025-08 | high | active | Strongest mini model. Cutoff: Aug 31, 2025. 400k context, 128k output. $0.75/$4.50 per MTok. |
| GPT Image 2 | gpt-image-2 |
2026-03 | n/a | low | active | State-of-the-art image generation model. |
| GPT-Realtime-2 | gpt-realtime-2 |
2026-03 | n/a | low | active | Reasoning model for realtime voice interactions. |
| GPT-4o | gpt-4o |
2024-05 | 2023-10 | high | active | Legacy. Still available. Multiple snapshots. |
| GPT-4o mini | gpt-4o-mini |
2024-07 | 2023-10 | high | active | Legacy small model. |
| o3 | o3 |
2025-04 | 2024-06 | medium | active | Legacy reasoning model. |
| o3 mini | o3-mini |
2025-01 | 2024-06 | medium | active | Legacy reasoning model. |
| o1 | o1 |
2024-09 | 2023-10 | high | active | Legacy reasoning model. |
| GPT-4o mini TTS | gpt-4o-mini-tts |
2025-03 | n/a | low | deprecated | Deprecated text-to-speech model. |
| GPT-4o Transcribe | gpt-4o-transcribe |
2025-03 | n/a | low | active | Speech-to-text. |
| GPT-4o mini Transcribe | gpt-4o-mini-transcribe |
2025-03 | n/a | low | active | Speech-to-text. |
Knowledge Cutoffs