**Root Cause:**
The requested context window (**262,144 tokens**) is too large for the available GPU memory. A 256k context requires several gigabytes of VRAM just for the KV cache, but the system only has **1,024 MiB** (1 GB) of free memory available.

**Next Two Actions:**
1. **Reduce Context Size:** Lower the context window parameter (e.g., `--ctx-size 4096` or `8192`) to a value that fits within your available VRAM.
2. **Enable KV Cache Quantization:** If your hardware/software supports it, use a quantized KV cache (e.g., 4-bit or 8-bit) to significantly reduce the memory footprint of the context.