5 ms·

OpenAI has only provided MXFP4 weights. These are the same weights used by other cloud providers.

• irthomasthomas 1y ago
  Oh, I didn't know that. Weird!
  • reissbaker 1y ago
    It was natively trained in FP4. Probably both to reduce VRAM usage at inference time (fits on a single H100), and to allow better utilization of B200s (which are especially fast for FP4).
    • irthomasthomas 1y ago
      Interesting, thanks. I didn't know you could even train at FP4 on H100s
      • reissbaker 1y ago
        It's impressive they got it to work — the lowest I'd heard of this far was native FP8 training.