| 2 models | Mi Microsoft Phi-4 View → | Op OpenAI GPT-5.5 View → |
|---|---|---|
| Maker | Microsoft | OpenAI |
| Tier | Flagship | Flagship |
| Status | Default | Default |
| Context window | 16K ctx | 1M ctx |
| Knowledge cutoff | — | Jan 1, 2026 |
| Released | Dec 1, 2024 | Apr 23, 2026 |
| API string | Phi-4 | gpt-5.5 |
| Note | 14B-parameter open-weight (MIT) flagship of Microsoft's Phi small-model family; top-of-class STEM reasoning for its size but limited to a 16K context window. Available on Azure AI Foundry, HuggingFace, and Ollama. |
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