Updating gpt-oss-20b to use mxfp8

[chelsea0x3b]

Loss dynamics

step:   1 loss: 12.81606 grad_norm: 13.6420 memory: 149.41GiB(83.78%) tps:    705 tflops:  22.08
step:  10 loss: 10.25156 grad_norm:  4.9128 memory: 169.74GiB(95.17%) tps: 12,659 tflops: 396.40
step:  20 loss:  8.10361 grad_norm:  5.8574 memory: 169.74GiB(95.17%) tps: 19,750 tflops: 618.45
step:  30 loss:  7.61133 grad_norm:  1.7541 memory: 169.74GiB(95.17%) tps: 19,688 tflops: 616.50
step:  40 loss:  7.22928 grad_norm:  1.5464 memory: 169.74GiB(95.17%) tps: 19,617 tflops: 614.26
step:  50 loss:  7.01949 grad_norm:  1.6498 memory: 169.74GiB(95.17%) tps: 19,640 tflops: 614.99
step:  60 loss:  6.84448 grad_norm:  3.0737 memory: 169.74GiB(95.17%) tps: 19,692 tflops: 616.64
step:  70 loss:  6.72140 grad_norm:  1.7173 memory: 169.74GiB(95.17%) tps: 19,709 tflops: 617.17
step:  80 loss:  6.52672 grad_norm:  1.5986 memory: 169.74GiB(95.17%) tps: 19,681 tflops: 616.28
step:  90 loss:  6.48507 grad_norm:  1.5715 memory: 169.74GiB(95.17%) tps: 19,707 tflops: 617.09
step: 100 loss:  6.44737 grad_norm:  4.9927 memory: 169.74GiB(95.17%) tps: 19,775 tflops: 619.22

Full log here:
gpt-oss-mxfp8.txt