Error5 reports
Fix OutOfMemoryError
in Unsloth
✅ Solution
OutOfMemoryError typically arises when the model and training data exceed available GPU memory. Reduce batch size, use gradient accumulation, enable CPU offloading via `unsloth.utils.force_low_cpu_mem` if possible, or switch to a smaller model to decrease memory footprint and prevent the error. Consider upgrading your GPU or using distributed training across multiple GPUs if the problem persists.
Related Issues
Real GitHub issues where developers encountered this error:
[Bug] GRPO Training VRAM usage increases with each step. OOM ErrorJan 8, 2026
[Bug] OOM with UNSLOTH_VLLM_STANDBY=1 + fast_inference=True (4-bit)Nov 1, 2025
CUDA out of memory ErrorOct 10, 2025
[Bug] FastModel Doesn't Support MultiGPU Finetuning.Oct 10, 2025
OOM for GPT OSS 120b on 183GB of VRAM (B200)Oct 5, 2025
Timeline
First reported:Oct 5, 2025
Last reported:Jan 8, 2026