diff --git a/run_evaluations_multi_gpu.sh b/run_evaluations_multi_gpu.sh
index f9136e0..9bb498a 100644
--- a/run_evaluations_multi_gpu.sh
+++ b/run_evaluations_multi_gpu.sh
@@ -4,12 +4,12 @@ set -euo pipefail
 usage() {
   cat <<'USAGE'
 Usage:
-  ./run_evaluations_multi_gpu.sh --gpus 0,1,2 --tau-short 0.5 [options] [-- <extra eval args>]
+  ./run_evaluations_multi_gpu.sh --gpus 0,1,2 [options] [-- <common eval args>]
 
 Description:
   Discovers trained run directories (containing best_model.pt + train_config.json)
   and runs BOTH evaluations on each run:
-    1) evaluate_next_event.py (requires --tau_short)
+    1) evaluate_next_event.py
     2) evaluate_horizon.py
 
   Jobs are distributed round-robin across the provided GPU list and each GPU runs
@@ -17,24 +17,29 @@ Description:
 
 Options:
   --gpus              Comma-separated GPU ids (required), e.g. 0,1,2
-  --tau-short         Short-window horizon (years) for evaluate_next_event.py (required)
   --runs-root         Root directory containing run subfolders (default: runs)
   --pattern           Shell glob to filter run folder basenames (default: *)
   --run-dirs-file     Text file with one run_dir per line (overrides --runs-root)
   --horizons          Horizon grid in years (space-separated list). If omitted, uses script defaults.
   --age-bins          Age bin boundaries in years (space-separated list). If omitted, uses script defaults.
+  --next-args-file     File with one CLI argument per line appended only to evaluate_next_event.py
+  --horizon-args-file  File with one CLI argument per line appended only to evaluate_horizon.py
   --python            Python executable/command (default: python)
   --log-dir           Directory for logs (default: eval_logs)
   --dry-run           Print commands without executing
   --help|-h           Show this help
 
-Extra eval args:
+Common eval args:
   Anything after `--` is appended to BOTH evaluation commands.
-  Examples: -- --batch_size 512 --num_workers 4 --seed 0 --min_pos 20 --no_tqdm
+  Use this only for flags supported by BOTH scripts (e.g. --batch_size, --num_workers, --seed, --min_pos, --no_tqdm).
+
+Per-eval args:
+  For eval-specific flags (e.g. evaluate_horizon.py --topk_list / --workload_fracs), use --horizon-args-file.
+  Args files are "one argument per line"; blank lines are ignored.
 
 Examples:
-  ./run_evaluations_multi_gpu.sh --gpus 0,1 --tau-short 0.5
-  ./run_evaluations_multi_gpu.sh --gpus 0,1 --tau-short 0.5 --runs-root runs --pattern "delphi_*" \
+  ./run_evaluations_multi_gpu.sh --gpus 0,1
+  ./run_evaluations_multi_gpu.sh --gpus 0,1 --runs-root runs --pattern "delphi_*" \
     --horizons 0.25 0.5 1 2 5 10 --age-bins 40 45 50 55 60 65 70 75 inf -- --batch_size 512 --num_workers 4
 
 USAGE
@@ -47,11 +52,11 @@ gpu_list=""
 python_cmd="python"
 log_dir="eval_logs"
 dry_run=0
-
-tau_short=""
 horizons=()
 age_bins=()
 extra_args=()
+next_args_file=""
+horizon_args_file=""
 
 while [[ $# -gt 0 ]]; do
   case "$1" in
@@ -59,10 +64,6 @@ while [[ $# -gt 0 ]]; do
       gpu_list="${2-}"
       shift 2
       ;;
-    --tau-short)
-      tau_short="${2-}"
-      shift 2
-      ;;
     --runs-root)
       runs_root="${2-}"
       shift 2
@@ -75,6 +76,14 @@ while [[ $# -gt 0 ]]; do
       run_dirs_file="${2-}"
       shift 2
       ;;
+    --next-args-file)
+      next_args_file="${2-}"
+      shift 2
+      ;;
+    --horizon-args-file)
+      horizon_args_file="${2-}"
+      shift 2
+      ;;
     --python)
       python_cmd="${2-}"
       shift 2
@@ -125,10 +134,21 @@ if [[ -z "$gpu_list" ]]; then
   exit 2
 fi
 
-if [[ -z "$tau_short" ]]; then
-  echo "Error: --tau-short is required (e.g. --tau-short 0.5)." >&2
-  exit 2
-fi
+read_args_file() {
+  local f="${1-}"
+  if [[ -z "$f" ]]; then
+    return 0
+  fi
+  if [[ ! -f "$f" ]]; then
+    echo "Error: args file not found: $f" >&2
+    exit 2
+  fi
+  while IFS= read -r line || [[ -n "$line" ]]; do
+    line="${line%$'\r'}" # handle CRLF
+    [[ -z "$line" ]] && continue
+    printf '%s\n' "$line"
+  done < "$f"
+}
 
 mkdir -p "$log_dir"
 
@@ -226,13 +246,18 @@ for i in "${!gpus[@]}"; do
         echo "gpu: $gpu"
         echo "job_id: $jid"
         echo "run_dir: $run_dir"
-        echo "tau_short: $tau_short"
         if [[ ${#horizons[@]} -gt 0 ]]; then
           echo "horizons: ${horizons[*]}"
         fi
         if [[ ${#age_bins[@]} -gt 0 ]]; then
           echo "age_bins: ${age_bins[*]}"
         fi
+        if [[ -n "${next_args_file}" ]]; then
+          echo "next_args_file: ${next_args_file}"
+        fi
+        if [[ -n "${horizon_args_file}" ]]; then
+          echo "horizon_args_file: ${horizon_args_file}"
+        fi
         if [[ ${#extra_args[@]} -gt 0 ]]; then
           echo "extra_args: ${extra_args[*]}"
         fi
@@ -240,10 +265,15 @@ for i in "${!gpus[@]}"; do
       } > "$log_file"
 
       # Build argv arrays
-      next_cmd=("$python_cmd" evaluate_next_event.py --run_dir "$run_dir" --tau_short "$tau_short")
+      next_cmd=("$python_cmd" evaluate_next_event.py --run_dir "$run_dir")
       if [[ ${#age_bins[@]} -gt 0 ]]; then
         next_cmd+=(--age_bins "${age_bins[@]}")
       fi
+      if [[ -n "${next_args_file}" ]]; then
+        while IFS= read -r a; do
+          next_cmd+=("$a")
+        done < <(read_args_file "${next_args_file}")
+      fi
       if [[ ${#extra_args[@]} -gt 0 ]]; then
         next_cmd+=("${extra_args[@]}")
       fi
@@ -255,6 +285,11 @@ for i in "${!gpus[@]}"; do
       if [[ ${#age_bins[@]} -gt 0 ]]; then
         hor_cmd+=(--age_bins "${age_bins[@]}")
       fi
+      if [[ -n "${horizon_args_file}" ]]; then
+        while IFS= read -r a; do
+          hor_cmd+=("$a")
+        done < <(read_args_file "${horizon_args_file}")
+      fi
       if [[ ${#extra_args[@]} -gt 0 ]]; then
         hor_cmd+=("${extra_args[@]}")
       fi