Comparison · Updated Oct 28, 2026
GPT-4.1 vs GPT-4o
GPT-4.1 is API-only and tuned for coding and long documents with a ~1M context; GPT-4o powers ChatGPT with voice and audio.
At a glance
| Spec | GPT-4.1 | GPT-4o |
|---|---|---|
| Released | Apr 14, 2025 | May 13, 2024 |
| Context window | 1.0M tokens | 128K tokens |
| Licence | Closed / API | Closed / API |
| Inputs | text, image | text, image, audio |
| Public API | Yes | Yes |
Model A
GPT-4.1
API-only OpenAI model focused on coding and instruction following, with a context window of about 1M tokens.
Apr 14, 2025
Model B
GPT-4o
Omni-model unifying text, vision and audio in a single network with realtime capabilities.
May 13, 2024
Differences
| Attribute | GPT-4.1 | GPT-4o |
|---|---|---|
| Context window | ~1M | 128K |
| Available in | API | API and ChatGPT |
| Audio | No | Yes |
| Released | Apr 2025 | May 2024 |