Ollama Library · llama
Can I run zephyr?
Zephyr is a series of fine-tuned versions of the Mistral and Mixtral models that are trained to act as helpful assistants.
7B parameters32K contexttextMIT License15 builds
zephyr system requirements
Memory needed at 4K context, counting model weights, KV cache, compute buffers and runtime overhead. Download sizes come from the official Ollama registry.
| Build | Quantization | Download | Memory needed |
|---|---|---|---|
| zephyr:7b | Q4_0 | 3.8 GB | ~5.9 GB(est.) |
| zephyr:7b-alpha-q4_0 | Q4_0 | 3.8 GB | ~5.9 GB(est.) |
| zephyr:7b-beta-q4_K_M | Q4_K_M | 4.1 GB | ~6.2 GB(est.) |
| zephyr:7b-alpha-q4_K_M | Q4_K_M | 4.1 GB | ~6.2 GB(est.) |
| zephyr:7b-alpha-q5_K_M | Q5_K_M | 4.8 GB | ~7.2 GB(est.) |
| zephyr:7b-beta-q5_K_M | Q5_K_M | 4.8 GB | ~7.2 GB(est.) |
| zephyr:7b-alpha-q6_K | Q6_K | 5.5 GB | ~8.3 GB(est.) |
| zephyr:7b-beta-q6_K | Q6_K | 5.5 GB | ~8.3 GB(est.) |
Figures marked (est.) approximate the KV cache because this model's architecture details are not published. They are indicative rather than exact.
How to run zephyr locally
- 1.Install Ollama for Windows, macOS or Linux.
- 2.Run this in a terminal:
ollama run zephyr:7b - 3.The weights download on first run, then an interactive prompt opens.
Frequently asked questions about zephyr
- How much VRAM do I need to run zephyr?
- At 4K context, the smallest published build of zephyr (Q4_0) needs roughly 5.9 GB of GPU memory once weights, KV cache, compute buffers and runtime overhead are counted. Bigger quantizations and longer context windows need more. It can also run partly or entirely on the CPU using system RAM, more slowly.
- Can I run zephyr without a dedicated GPU?
- Yes, but slowly. Without a GPU the model runs on the CPU using system RAM, which usually means a few tokens per second rather than dozens. You would need at least 5.9 GB of free RAM for the smallest build.
- How big is the zephyr download?
- The smallest published build is 3.8 GB. There are 15 builds in total, the largest being 261.9 GB. Leave some extra free disk space beyond the download itself.
- How do I run zephyr locally?
- Install Ollama, then run "ollama run zephyr:7b" in a terminal. The weights download on first use and an interactive session opens.
Will zephyr run on your PC?
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Model data from the official Ollama registry · verified 13/09/2026