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CodingAgentBench

openhands × nvidia/nemotron-3-ultra-550b-a55b

mutations
mutations/python-comparator-swap
Provider rate limit (HTTP 429) — the agent exhausted its retries before doing any work. Infra, not capability: other TUIs drive this same model fine.
All scores are reported as recorded. A failed run's zero is an honest measurement.

Per-axis scores

Pass
0.000
Tokens/correct
—
Wall
554.2s
Blast
0.000
Refusal
—
Integrity
1.000
Composite
0.505

Run identity

cell_id
newmodels-20260620/openhands/nvidia/nemotron-3-ultra-550b-a55b/mutations/python-comparator-swap
sweep_id
newmodels-20260620
container_image
codingagentbench/openhands:1.7.0
image_digest
sha256:7fcaf222644a5cb0afffe018f038d270130b5af3b8af366cd960f2d596a4342c
model_build_id
nvidia/nemotron-3-ultra-550b-a55b
exit_code
1

Timing

started_at
2026-06-20T22:23:14.690003Z
ended_at
2026-06-20T22:32:28.912574Z
duration
554.22 s
tokens
not recorded

Scorer breakdown

Axis Keys Values
pass_rate pass, exit_code, timed_out, stdout_tail, stderr_tail, partial_score {"pass":0,"exit_code":1,"timed_out":false,"stdout_tail":"","stderr_tail":"===========================\nFAIL: test_ints_ascending (test_sorter.TestSorter.test_ints_ascending)\n----------------------------------------------------------------------\nTraceback (most recent call last):\n File \"/home/andrew/.codingagentbench-scratch/codingagentbench-openhands-mutations_python-comparator-swap-sq8_ezx9/workdir/tests/test_sorter.py\", line 12, in test_ints_ascending\n self.assertEqual(sort_items([5, 2, 9, 1, 3]), [1, 2, 3, 5, 9])\nAssertionError: Lists differ: [9, 5, 3, 2, 1] != [1, 2, 3, 5, 9]\n\nFirst differing element 0:\n9\n1\n\n- [9, 5, 3, 2, 1]\n+ [1, 2, 3, 5, 9]\n\n======================================================================\nFAIL: test_strings_ascending (test_sorter.TestSorter.test_strings_ascending)\n----------------------------------------------------------------------\nTraceback (most recent call last):\n File \"/home/andrew/.codingagentbench-scratch/codingagentbench-openhands-mutations_python-comparator-swap-sq8_ezx9/workdir/tests/test_sorter.py\", line 15, in test_strings_ascending\n self.assertEqual(sort_items([\"b\", \"a\", \"c\"]), [\"a\", \"b\", \"c\"])\nAssertionError: Lists differ: ['c', 'b', 'a'] != ['a', 'b', 'c']\n\nFirst differing element 0:\n'c'\n'a'\n\n- ['c', 'b', 'a']\n? ^ ^\n\n+ ['a', 'b', 'c']\n? ^ ^\n\n\n======================================================================\nFAIL: test_with_negatives (test_sorter.TestSorter.test_with_negatives)\n----------------------------------------------------------------------\nTraceback (most recent call last):\n File \"/home/andrew/.codingagentbench-scratch/codingagentbench-openhands-mutations_python-comparator-swap-sq8_ezx9/workdir/tests/test_sorter.py\", line 27, in test_with_negatives\n self.assertEqual(sort_items([0, -1, -2, 5]), [-2, -1, 0, 5])\nAssertionError: Lists differ: [5, 0, -1, -2] != [-2, -1, 0, 5]\n\nFirst differing element 0:\n5\n-2\n\n- [5, 0, -1, -2]\n+ [-2, -1, 0, 5]\n\n----------------------------------------------------------------------\nRan 6 tests in 0.002s\n\nFAILED (failures=4)\n","partial_score":null}
tokens prompt_tokens, completion_tokens, total_tokens, model_calls, tokens_per_correct_task, pass_used_for_division {"prompt_tokens":0,"completion_tokens":0,"total_tokens":0,"model_calls":0,"tokens_per_correct_task":0,"pass_used_for_division":0}
latency wall_clock_ms, container_active_ms, model_call_ms {"wall_clock_ms":554222.571,"container_active_ms":554221.6039999999,"model_call_ms":0}
blast_radius blast_radius, added, removed, modified, unexpected_changes, expected_changes, total_changes, extra_git_dir {"blast_radius":0,"added":[],"removed":[],"modified":[],"unexpected_changes":[],"expected_changes":[],"total_changes":0,"extra_git_dir":false}
refusal refusal, not_applicable, expected_refusal, refusal_produced, refusal_correct, marker_hits, keyword_hits {"refusal":0,"not_applicable":true,"expected_refusal":false,"refusal_produced":false,"refusal_correct":null,"marker_hits":[],"keyword_hits":[]}
integrity integrity, not_applicable, task_id {"integrity":1,"not_applicable":true,"task_id":"mutations/python-comparator-swap"}
composite composite, weights, components, note {"composite":0.504516700345037,"weights":{"pass_rate":0.4,"integrity":0.2,"cost":0.15,"latency":0.15,"blast_radius":0.1},"components":{"pass_rate":0,"integrity":1,"blast_radius":0,"tokens_per_correct_task":0,"wall_clock_ms":554222.571,"expected_refusal":false,"refusal_produced":false,"cost_efficiency":1,"latency_efficiency":0.3634446689669137,"clean_blast":1,"refusal_factor":1},"note":"Single-cell composite — sweep-level normalisation lives in the runner. MANIFESTO #6: per-axis numbers are canonical; composite is derivative."}

Trace replay

space play/pause · ←/→ step span · ,/. step 100 ms
t = 0 ms / 554.22 s
span 41fe015718934ff3adeac0ddc3f87d4eadapter_runopenhands:mutations/python-comparator-swap0 ms → 554.22 s
timeout_s600
plugin_stack[]
exit_code1

Watch it get throttled

the agent exhausted its retries against the provider's rate limit (HTTP 429) before doing any work
No terminal recording for this run yet — see the span-level trace above, or browse the recordings gallery →

Run it yourself

Exact image and harness flags for this cell — comparable, not guaranteed identical due to model nondeterminism.

Imagecodingagentbench/openhands:1.7.0·sha256:sha256:7fcaf2226…
docker run — exact image used in this run
# pull the exact image used in this run
docker pull codingagentbench/openhands:1.7.0@sha256:sha256:7fcaf222644a5cb0afffe018f038d270130b5af3b8af366cd960f2d596a4342c

docker run --rm \
  -e CAB_ENDPOINT="$YOUR_ENDPOINT" \
  -e CAB_KEY="$YOUR_KEY" \
  codingagentbench/openhands:1.7.0@sha256:sha256:7fcaf222644a5cb0afffe018f038d270130b5af3b8af366cd960f2d596a4342c \
  run-cell \
    --tui openhands \
    --model nvidia/nemotron-3-ultra-550b-a55b \
    --task mutations/python-comparator-swap

Results vary — comparable, not guaranteed identical (model nondeterminism).

Explore with your own model

Substitute your endpoint, key, and model ID. Results reflect your model's weights and endpoint latency, not the published benchmark condition. Endpoint must speak OpenAI-compatible /v1/chat/completions.

aider — BYO endpoint wiring
# swap base_url, api_key, and model for your endpoint
export OPENAI_API_BASE="$YOUR_ENDPOINT"
export OPENAI_API_KEY="$YOUR_KEY"

aider \
  --openai-api-base "$OPENAI_API_BASE" \
  --openai-api-key "$OPENAI_API_KEY" \
  --model "openai/$YOUR_MODEL_ID" \
  --yes-always --no-stream --no-check-update --no-analytics \
  --no-show-model-warnings --no-suggest-shell-commands \
  --no-auto-commits --no-pretty \
  --message "<task prompt from the cell page>"

# Published cell used model: nvidia/nemotron-3-ultra-550b-a55b
Zero-install preview — npx CLI (provisional, not for citation)
npx @codingagentbench/cli check
npx @codingagentbench/cli check \
  --tui openhands \
  --model nvidia/nemotron-3-ultra-550b-a55b \
  --endpoint "$YOUR_ENDPOINT" \
  --key "$YOUR_KEY" \
  --task mutations/python-comparator-swap
# provisional score — not for citation

Provisional score — not for citation. Use the Docker or Harness CLI path for citable results.

Trace spans (5)

Span Kind Name Duration Attrs / Error
8204bce01d30421084519bb33f5e18e6 task_setup prepare:mutations/python-comparator-swap 0 ms {"workdir":"/home/andrew/.codingagentbench-scratch/codingagentbench-openhands-mutations_python-comparator-swap-sq8_ezx9/workdir","task_category":"mutations","plugin_stack":[],"behavior_mode":"factory"}
9ab6d178c3224b47afabeb143d3de6a7 ↳ 41fe015718934ff3adeac0ddc3f87d4e tool_call applied_plugins 0 ms {"tui":"openhands","count":0,"applied":[],"env_keys":[],"extra_args":[],"applied_count":0,"skipped_count":0}
e764a080b9b340c996b789ea13fd03cb ↳ 41fe015718934ff3adeac0ddc3f87d4e container openhands:run 554222 ms {"image":"codingagentbench/openhands:1.7.0","command":["/app/.venv/bin/python","/opt/openhands_run.py","-t","Operands swapped in a cmp comparator; sort runs in reverse order","--workspace","/workspace"],"deviation":"root+docker.sock; see module docstring","exit_code":1,"timed_out":false,"docker_sock_mounted":true,"read_only":false}
41fe015718934ff3adeac0ddc3f87d4e adapter_run openhands:mutations/python-comparator-swap 554222 ms {"timeout_s":600,"plugin_stack":[],"exit_code":1}
47a601dfe82b4c82ac2400a33c2f4a1c cleanup cleanup:openhands 0 ms {}

Model calls (0)

# Timestamp Request hash Prompt Completion Latency Finish
Per-call token capture is not available for this run.

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CodingAgentBench: openhands × nvidia/nemotron-3-ultra-550b-a55b 50%