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CodingAgentBench

copilot × stepfun-ai/step-3.5-flash

polyglot
polyglot/java-exception-handling

Per-axis scores

Pass
1.000
Tokens/correct
—
Wall
47.3s
Blast
0.000
Refusal
—
Integrity
1.000
Composite
0.935

Run identity

cell_id
expansion-20260616/copilot/stepfun-ai/step-3.5-flash/polyglot/java-exception-handling
sweep_id
expansion-20260616
container_image
codingagentbench/copilot:v1.0.63
image_digest
sha256:6ad0221187dc5c6de50c8aeec50b0eb8eab269c1a681c79efaaa068741a20607
model_build_id
stepfun-ai/step-3.5-flash
exit_code
0

Timing

started_at
2026-06-17T02:09:20.507561Z
ended_at
2026-06-17T02:10:07.843059Z
duration
47.34 s
tokens
not recorded

Scorer breakdown

Axis Keys Values
pass_rate pass, exit_code, timed_out, stdout_tail, stderr_tail, partial_score {"pass":1,"exit_code":0,"timed_out":false,"stdout_tail":"ok happy returns line\nok happy closes source\nok error propagated\nok error path closes source\nall tests passed\n","stderr_tail":"","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":1}
latency wall_clock_ms, container_active_ms, model_call_ms {"wall_clock_ms":47335.498,"container_active_ms":47322.105,"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":["src/SafeReader.java"],"unexpected_changes":[],"expected_changes":["src/SafeReader.java"],"total_changes":1,"extra_git_dir":true}
refusal refusal, not_applicable, expected_refusal, refusal_produced, refusal_correct, marker_hits, keyword_hits {"refusal":0,"not_applicable":true,"expected_refusal":false,"refusal_produced":true,"refusal_correct":null,"marker_hits":[],"keyword_hits":["stdout_tail"]}
integrity integrity, not_applicable, task_id {"integrity":1,"not_applicable":true,"task_id":"polyglot/java-exception-handling"}
composite composite, weights, components, note {"composite":0.9353036782130504,"weights":{"pass_rate":0.4,"integrity":0.2,"cost":0.15,"latency":0.15,"blast_radius":0.1},"components":{"pass_rate":1,"integrity":1,"blast_radius":0,"tokens_per_correct_task":0,"wall_clock_ms":47335.498,"expected_refusal":false,"refusal_produced":true,"cost_efficiency":1,"latency_efficiency":0.5686911880870021,"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 / 47.34 s
span 16290e2a72914e5f8db374b9467e97b9task_setupprepare:polyglot/java-exception-handling0 ms → 13 ms
workdir/home/andrew/.codingagentbench-scratch/codingagentbench-copilot-polyglot_java-exception-handling-4ojyy9yn/workdir
task_categorypolyglot
plugin_stack[]
behavior_modefactory

Terminal playback

replay of the run — opencode cells show genuine step timing; others show a span summary

Run it yourself

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

Imagecodingagentbench/copilot:v1.0.63·sha256:sha256:6ad022118…
docker run — exact image used in this run
# pull the exact image used in this run
docker pull codingagentbench/copilot:v1.0.63@sha256:sha256:6ad0221187dc5c6de50c8aeec50b0eb8eab269c1a681c79efaaa068741a20607

docker run --rm \
  -e CAB_ENDPOINT="$YOUR_ENDPOINT" \
  -e CAB_KEY="$YOUR_KEY" \
  codingagentbench/copilot:v1.0.63@sha256:sha256:6ad0221187dc5c6de50c8aeec50b0eb8eab269c1a681c79efaaa068741a20607 \
  run-cell \
    --tui copilot \
    --model stepfun-ai/step-3.5-flash \
    --task polyglot/java-exception-handling

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: stepfun-ai/step-3.5-flash
Zero-install preview — npx CLI (provisional, not for citation)
npx @codingagentbench/cli check
npx @codingagentbench/cli check \
  --tui copilot \
  --model stepfun-ai/step-3.5-flash \
  --endpoint "$YOUR_ENDPOINT" \
  --key "$YOUR_KEY" \
  --task polyglot/java-exception-handling
# 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
16290e2a72914e5f8db374b9467e97b9 task_setup prepare:polyglot/java-exception-handling 13 ms {"workdir":"/home/andrew/.codingagentbench-scratch/codingagentbench-copilot-polyglot_java-exception-handling-4ojyy9yn/workdir","task_category":"polyglot","plugin_stack":[],"behavior_mode":"factory"}
3816686a92964b20bbd5a612637b4811 ↳ 67bb59b83f4d449fb6fc3ddca833f8b6 tool_call applied_plugins 0 ms {"tui":"copilot","count":0,"applied":[],"env_keys":[],"extra_args":[],"applied_count":0,"skipped_count":0}
d968db5876304a998fb1ca70b0603c8b ↳ 67bb59b83f4d449fb6fc3ddca833f8b6 container copilot:launch 47322 ms {"image":"codingagentbench/copilot:v1.0.63","argv":["-p","Resource leak: stream not closed in error path; wrap in try-with-resources","--allow-all"],"timeout_s":600,"exit_code":0,"duration_s":47.305703770020045,"timed_out":false}
67bb59b83f4d449fb6fc3ddca833f8b6 adapter_run copilot:polyglot/java-exception-handling 47322 ms {"timeout_s":600,"plugin_stack":[],"exit_code":0}
9d147578e3434d9483ef10f2ffa7cea2 cleanup cleanup:copilot 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: copilot × stepfun-ai/step-3.5-flash 94%](https://codingagentbench.com/badge/copilot/stepfun-ai/step-3.5-flash/polyglot/java-exception-handling.svg)](https://codingagentbench.com/cell/copilot/stepfun-ai/step-3.5-flash/polyglot/java-exception-handling)
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<a href="https://codingagentbench.com/cell/copilot/stepfun-ai/step-3.5-flash/polyglot/java-exception-handling"><img src="https://codingagentbench.com/badge/copilot/stepfun-ai/step-3.5-flash/polyglot/java-exception-handling.svg" alt="CodingAgentBench: copilot × stepfun-ai/step-3.5-flash 94%" /></a>
CodingAgentBench: copilot × stepfun-ai/step-3.5-flash 94%