{"type":"analysis","id":"analysis:research-miles-ships-nvfp4-w4a16-fake-qat-bf16-level-rl-stability-is-not-shown","slug":"research-miles-ships-nvfp4-w4a16-fake-qat-bf16-level-rl-stability-is-not-shown","title":"Miles ships NVFP4 W4A16 fake-QAT; BF16-level RL stability is not shown","description":"Fused NVFP4 fake-QAT kernels and a five-layer GLM-5.2 W4A16 recipe are merged and in Miles v0.1.1. The linked logs are a truncated smoke test with no BF16 control, so builders should not treat training-rollout mismatch as proven at the BF16 floor.","published_at":"2026-11-08T20:00:00.000Z","updated_at":"2026-11-08T20:00:00.000Z","record_date":"2026-11-08","topics":["routing","research"],"source_urls":["https://github.com/radixark/miles/pull/2864","https://github.com/radixark/Megatron-LM/pull/91","https://raw.githubusercontent.com/radixark/miles/main/tests/e2e/megatron/test_glm5_2_744b_a40b_5layer_nvfp4_w4a16.py","https://github.com/radixark/miles/pull/3217","https://miles.radixark.com/docs/advanced/low-precision","https://arxiv.org/html/2609.08368v1","https://github.com/radixark/miles/issues/3308","https://github.com/radixark/miles/issues/615","https://github.com/radixark/miles/releases/tag/v0.1.1","https://www.lmsys.org/blog/2026-07-29-mxfp8-nvfp4-rl/","https://github.com/radixark/miles/pull/1261","https://github.com/radixark/miles/pull/2855","https://humansand.ai/blog/nvfp4-rl"],"language":"en","routes":{"html":"https://newruntime.com/analysis/research-miles-ships-nvfp4-w4a16-fake-qat-bf16-level-rl-stability-is-not-shown/","markdown":"https://newruntime.com/analysis/research-miles-ships-nvfp4-w4a16-fake-qat-bf16-level-rl-stability-is-not-shown.md","json":"https://newruntime.com/analysis/research-miles-ships-nvfp4-w4a16-fake-qat-bf16-level-rl-stability-is-not-shown.json"},"author":{"role":"author","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"editorial_provenance":{"desk":"authorial","target_ref":"deep_research:2c9250cf-8c37-4ea6-853c-b459054b35e2","authorial_article_id":"2c9250cf-8c37-4ea6-853c-b459054b35e2"},"next_reads":[{"type":"collection","path":"/analysis/","url":"https://newruntime.com/analysis/","title":"Analysis","reason":"Open the latest authorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/analysis.json"},{"type":"collection","path":"/sources/","url":"https://newruntime.com/sources/","title":"Sources","reason":"See the original sources this archive cites.","media_type":"text/html"}]}