Sharpie marker · write c¶
Agent runs
Each mode of this task runs once per run. Est. cost is tokens at list price (data/prices.yml), never a bill; see the DexToolBench runs for every task of a run.
Codex + GPT-6 Luna, reasoning xhigh (ChatGPT login)default run
| Trial | Started | Agent time | Model requests | Tokens in / out | Est. cost | Grade |
|---|---|---|---|---|---|---|
| U✗ 1h 00m 0% | 09-28 23:36 | 1h 00m | — | 12.0M / 165k | $0.247 | grader_error 0, missing_trajectory 1 |
| L✗ 1h 00m 0% | 09-29 08:16 | 1h 00m | — | 22.6M / 173k | $0.343 | deterministic 1, grader_error 0, video_rendered 1 |
1 other run(s) of DexToolBench
Codex + GPT-6 Luna, reasoning xhigh (Azure OpenAI API, 2026-09-30 stress test)
| Trial | Started | Agent time | Model requests | Tokens in / out | Est. cost | Grade |
|---|---|---|---|---|---|---|
| U✗ 59m 8% | 09-30 02:07 | 59m | — | 17.7M / 257k | $0.348 | deterministic 1, grader_error 0, n_actions 2783, video_rendered 1 |
| L✗ 59m 0% ⓘ | 10-01 02:50 | 59m | — | 14.2M / 129k | $0.232 | deterministic 1, grader_error 0, video_rendered 1 |
Task instruction (upstream)
Pick up the sharpie marker and move it through the demonstrated motion (writing the letter C): bring it to each of the 25 goal poses in order.
Recorded by us: SimToolReal's pretrained RL policy replayed in our MuJoCo port of the task, four views (front, side / top, oblique); it reaches 25 of 25 goals here. The green ghost tool is the current goal.
What DexToolBench states about this task
| Defined in | dextoolbench/trajectories/marker/sharpie_marker/write_c.json |
| Category | marker |
| Object | sharpie_marker |
| Task | write_c |
| N Goals | 25 |
| Tool Model | assets/urdf/dextoolbench/marker/sharpie_marker/sharpie_marker.urdf |
| Table | table_narrow_whiteboard.urdf (a whiteboard at the table's edge) |
| Metric | task progress: goals reached / goals (8 grasp-box keypoints within 1.5 cm; 10 s per goal) |
From https://github.com/tylerlum/simtoolreal @ 313d5ae.
Measured on the stack we run — MuJoCo 3.3.7 (CPU, bit-exact replay), KUKA iiwa 14 (MuJoCo Menagerie 1b86ece) + Sharpa HA4, 600 Hz physics, 60 Hz control
| Harness Task | dextoolbench_marker_sharpie_marker_write_c |
| Oracle | SimToolReal's pretrained policy, recorded in this scene and replayed: 25/25 goals |
Read from run in our MuJoCo port (robot_coding_bench tasks/dextoolbench_marker_sharpie_marker_write_c, image rcb-mujoco 0.1.1), 2026-09-28.
Tags¶
Why this task is interesting¶
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