v26.05

Added

• Kimi K2 MXFP8 pretrain support.
• Nemotron 3 Nano (30B) and Super (120B) pretrain recipes.
• Slurm topology checks and CPU governor reporting in the system info microbenchmark.
• llmb-run job history and log handling.
• llmb-run flags: --env for container env overrides, additional Slurm pass-through flags, and dump-env Megatron-Bridge mode.

Changed

• Updated recipes to NeMo 26.04.00 where applicable.
• Refreshed DeepSeek V3, Nemotron 3, and Qwen3 configurations.

Fixed

• Legacy-parser grad-norm NaN handling.
• Archive exclusion for nsys_profile and PyTorch profiling output directories.
• Torchtitan container compatibility.

Removed

• Deprecated Grok1 and Nemotron4 recipes.
• Legacy setup_script installer path and Conda support.
• Deprecated llmb-run commands.

Known Issues

• DeepSeek V3 Megatron-Bridge on H100 requires uv <=0.9.28 during setup.
• EFA limitations remain for DeepSeek V3 (Megatron-Bridge H100, TorchTitan) and Qwen3 (30B H100, 235B H100); see Known Issues section of README for details.
• Optional PCT fixed-core CPU binding may improve select workloads on Granite Rapids systems where PCT is enabled. See the README Known Issues section before applying the patch.

End of Support

• LLMB v25.12.x and earlier are no longer supported as of v26.05.00. These release lines will not receive further updates, fixes, or support.