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bf16 vs fp8 KV — full-suite benchmark report

Date: 2026-08-22 · Duration: ~6 h (08:33–14:46) · Status: complete, stack auto-restored to fp8 Driver: /tmp/opencode/exp-bf16/exp-bf16.sh (detached, self-driving) · Log: /tmp/opencode/exp-bf16/exp.log

TL;DR

Recommendation: stay on fp8_e4m3 @ 4+2 slots. The fp8 stack matches bf16 exactly on pass rate (104/111 each) while being ~13–14% faster and ~21% cheaper on input tokens, with double the fan-out headroom. bf16 KV precision earns no measurable benefit on this 37-task suite.

wojciak

#!/bin/bash

# Check if the nomad CLI is installed
if ! command -v nomad &> /dev/null; then
    echo "Nomad CLI could not be found. Please install it first."
    exit 1
fi

# Get a list of all running jobs
running_jobs=$(nomad job status -short | grep running | awk '{print $1}')

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body {
  background: #db0000;
}

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syntax = "proto3";

package audio_node;

service AudioNode {
  // 1 connection with all audio channels
  rpc StartAudioIngestion (CallId) returns (Empty);
  rpc IngestAudio (stream AudioChunk) returns (Empty);
  rpc FinishAudioIngestion (CallId) returns (Empty);

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function flatten(arr) {
  if (Array.flat) { // because we're all excited that this is finally making production!
    return arr.flat(Infinity);
  }


  if (!arr.some(item => Array.isArray(item))) {
     return arr;
  }
 

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#include <thread>
#include <future>
#include <chrono>
#include <iostream>
#include <vector>

double runMeAsync(int n) {
    n *= 10000000;
    for (unsigned i = 0; i < 100000000; i++) {
        n++;

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function fixIframe() {
    // get the images
    var images = $("img[src*=imgur]");
    
    images.each(function(i, image) {
        var $image = $(image),
            iframe,
            content;
        
        // wrap each image into an iframe that pretends we load the images from our local computer

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git submodule foreach -q --recursive 'branch="$(git config -f $toplevel/.gitmodules submodule.$name.branch)" && git checkout $branch'

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//convert
for i in *.wav; do lame -b 320 -h "${i}" "${i}.mp3"; done
//remove the .wav part
for f in *.mp3; do mv "$f" "${f/.*./.}"; done

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// Cleaning up pixi sprite reference arrays

// Don't
var elements = [];

function() {
    elements.forEach(function (element) {
        element.parent.removeChild(element);
        element = null;
    });