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CodingAgentBench

aider × stepfun-ai/step-3.5-flash

polyglot
polyglot/java-exception-handling

Per-axis scores

Pass
1.000
Tokens/correct
—
Wall
446.7s
Blast
0.857
Refusal
—
Integrity
1.000
Composite
0.821

Run identity

cell_id
free-20260527/aider/stepfun-ai/step-3.5-flash/polyglot/java-exception-handling#run1
sweep_id
free-20260527
container_image
codingagentbench/aider:v0.86.0
image_digest
sha256:f2cd27890475900f9cb617b1c7a6328989a48e8168e7280ac2247a5d2d26d8a1
model_build_id
stepfun-ai/step-3.5-flash
exit_code
0

Timing

started_at
2026-05-29T14:03:40.866957Z
ended_at
2026-05-29T14:11:07.596813Z
duration
446.73 s
prompt_tokens
1,300
completion_tokens
432
tokens source
TUI stdout

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":446729.85599999997,"container_active_ms":446715.874,"model_call_ms":0}
blast_radius blast_radius, added, removed, modified, unexpected_changes, expected_changes, total_changes, extra_git_dir {"blast_radius":0.8571428571428571,"added":[".aider.chat.history.md",".aider.input.history",".aider.tags.cache.v4/cache.db",".aider/analytics.json",".aider/caches/model_prices_and_context_window.json",".aider/installs.json"],"removed":[],"modified":["src/SafeReader.java"],"unexpected_changes":[".aider.chat.history.md",".aider.input.history",".aider.tags.cache.v4/cache.db",".aider/analytics.json",".aider/caches/model_prices_and_context_window.json",".aider/installs.json"],"expected_changes":["src/SafeReader.java"],"total_changes":7,"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":0.8206839132015993,"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":0.8571428571428571,"tokens_per_correct_task":0,"wall_clock_ms":446729.85599999997,"expected_refusal":false,"refusal_produced":true,"cost_efficiency":1,"latency_efficiency":0.3759879927725652,"clean_blast":0.1428571428571429,"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 / 446.73 s
span 3c694020f1cc48cea6e311b40ea454c1task_setupprepare:polyglot/java-exception-handling0 ms → 14 ms
workdir/tmp/codingagentbench-scratch/codingagentbench-aider-polyglot_java-exception-handling-no1pgpat/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/aider:v0.86.0·sha256:sha256:f2cd27890…
docker run — exact image used in this run
# pull the exact image used in this run
docker pull codingagentbench/aider:v0.86.0@sha256:sha256:f2cd27890475900f9cb617b1c7a6328989a48e8168e7280ac2247a5d2d26d8a1

docker run --rm \
  -e CAB_ENDPOINT="$YOUR_ENDPOINT" \
  -e CAB_KEY="$YOUR_KEY" \
  codingagentbench/aider:v0.86.0@sha256:sha256:f2cd27890475900f9cb617b1c7a6328989a48e8168e7280ac2247a5d2d26d8a1 \
  run-cell \
    --tui aider \
    --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 aider \
  --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 (6)

Span Kind Name Duration Attrs / Error
3c694020f1cc48cea6e311b40ea454c1 task_setup prepare:polyglot/java-exception-handling 14 ms {"workdir":"/tmp/codingagentbench-scratch/codingagentbench-aider-polyglot_java-exception-handling-no1pgpat/workdir","task_category":"polyglot","plugin_stack":[],"behavior_mode":"factory"}
399daeb74805444e9a23da030b8ae968 ↳ 94a20aae1b64464bac0fd4dae8c66ae6 task_setup aider:git-init-marker 0 ms {"workdir":"/tmp/codingagentbench-scratch/codingagentbench-aider-polyglot_java-exception-handling-no1pgpat/workdir","git_dir_exists":true}
757d0f9b2b8e4185b0fd6559cc8d9a67 ↳ 94a20aae1b64464bac0fd4dae8c66ae6 tool_call applied_plugins 0 ms {"tui":"aider","count":0,"applied":[],"env_keys":[],"extra_args":[],"applied_count":0,"skipped_count":0}
8f983b9ef4a8429e9584ee57d8fa7e67 ↳ 94a20aae1b64464bac0fd4dae8c66ae6 container aider:launch 446716 ms {"image":"codingagentbench/aider:v0.86.0","argv":["--yes-always","--no-stream","--no-check-update","--no-analytics","--no-show-model-warnings","--no-suggest-shell-commands","--no-auto-commits","--no-pretty","--openai-api-base","http://172.17.0.1:31415/v1","--openai-api-key","sk-ijYE3GGIl2pTqBtwcCcuaIsZzYIIFrIWLMG3qmOK","--model","openai/stepfun-ai/step-3.5-flash","--subtree-only","--message","Resource leak: stream not closed in error path; wrap in try-with-resources"],"timeout_s":600,"exit_code":0,"duration_s":446.69931982999697,"timed_out":false}
94a20aae1b64464bac0fd4dae8c66ae6 adapter_run aider:polyglot/java-exception-handling 446716 ms {"timeout_s":600,"plugin_stack":[],"exit_code":0}
aeed353f954744a6b12c5ce74757ecb8 cleanup cleanup:aider 0 ms {}

Model calls (0)

# Timestamp Request hash Prompt Completion Latency Finish
Per-call records not captured for this run. TUI-reported session totals: 1,300 prompt + 432 completion tokens.

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CodingAgentBench: aider × stepfun-ai/step-3.5-flash 82%