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This dataset contains evaluation traces on the APEX-Agents benchmark, including rubric criteria and judge rationales. Like the canonical mercor/apex-agents dataset, it is intended exclusively for model evaluation. Any use of this dataset for training, fine-tuning, or parameter fitting is forbidden. Crawling or scraping the dataset is also forbidden. By requesting access you agree to these terms.

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ApexAgents Recipe — APEX-Agents 480 Eval Traces

Full evaluation trial dumps on the 480-task APEX-Agents benchmark for four model configurations: Qwen3.5-397B and Qwen3.6-35B, each before and after RL post-training with the ApexAgents SkyRL recipe. Each set contains 3 independent evaluation runs over all 480 tasks (one tarball per run).

Companion dataset: ApexAgentsRecipe-TBench2_1-EvalTraces (the same four models evaluated on Terminal-Bench 2.1).

License and intended use

CC-BY-4.0, with the same restriction as the canonical mercor/apex-agents benchmark: these traces (including rubric criteria and judge rationales embedded in grades) are for model evaluation only — using them for training, fine-tuning, or parameter fitting is forbidden, as is crawling or scraping.

Sets

Folder Model Checkpoint Runs
Qwen3p5-397B_untrained_traces Qwen3.5-397B-A17B base run1–3
Qwen3p5-397B_trained_traces Qwen3.5-397B-A17B post-trained run1–3
Qwen3p6-35B_untrained_traces Qwen3.6-35B-A3B base run1–3
Qwen3p6-35B_trained_traces Qwen3.6-35B-A3B post-trained pass1–3

Results

MeanReward is the average reward over the 480 tasks (rewards are fractional, in [0, 1]); Pass@1 is the fraction of trials with a perfect reward of 1.0. Both are the mean ± sample standard deviation over the 3 runs.

Set MeanReward Pass@1
Qwen3.5-397B untrained 31.29% ± 1.98 16.11% ± 1.48
Qwen3.5-397B trained 43.18% ± 0.93 27.29% ± 1.04
Qwen3.6-35B untrained 28.69% ± 1.29 13.96% ± 1.46
Qwen3.6-35B trained 38.69% ± 0.57 22.71% ± 0.83

Harness

All runs use the Archipelago MCP-based agent inside a Harbor-style trial runner: max_steps=250, temperature 1.0, top_p=1.0, top_k disabled, 262k-token context. The agent works through MCP tools (document readers, spreadsheets, chat/email servers, code execution) inside each task's simulated company world.

Layout

Each folder holds one gzipped tarball per evaluation run. Inside a tarball, every trial is a directory named <task_name>__<trial_id>/:

<task_name>__<trial_id>/
  config.json            trial configuration (task path, agent/model settings)
  result.json            full trial result (config, timing, exception info)
  trial.log              trial runner log
  agent/
    trajectory.json      the agent's message trajectory
    tito_transitions.json  token-in/token-out transitions (training-format rollout)
    start.log, tito_debug.txt
  verifier/
    reward.json          reward plus per-verifier judge grades and rationales
    grade_log.txt, test-stdout.txt, reward.txt
  artifacts/manifest.json

Reproducing the scores

import glob, json, tarfile

for run_tgz in sorted(glob.glob("Qwen3p6-35B_trained_traces/*.tar.gz")):
    rewards = []
    with tarfile.open(run_tgz) as tf:
        for m in tf.getmembers():
            if m.name.endswith("verifier/reward.json"):
                rewards.append(json.load(tf.extractfile(m)).get("reward") or 0.0)
    mean = sum(rewards) / len(rewards)
    pass1 = sum(r == 1.0 for r in rewards) / len(rewards)
    print(f"{run_tgz}: n={len(rewards)} mean_reward={mean:.4f} pass@1={pass1:.4f}")
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