aider × stepfun-ai/step-3.5-flash

polyglot

polyglot/python-palindrome-check

Per-axis scores

Pass

1.000

Tokens/correct

—

Wall

109.3s

Blast

0.857

Refusal

—

Integrity

1.000

Composite

0.837

Run identity

cell_id: free-20260527/aider/stepfun-ai/step-3.5-flash/polyglot/python-palindrome-check#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: 2026-05-29T13:32:16.411060Z
ended_at: 2026-05-29T13:34:05.683587Z
duration: 109.27 s
prompt_tokens: 1,000
completion_tokens: 1,500
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":"","stderr_tail":"test_basic_false (test_palindrome.TestPalindrome.test_basic_false) ... ok\ntest_basic_true (test_palindrome.TestPalindrome.test_basic_true) ... ok\ntest_empty (test_palindrome.TestPalindrome.test_empty) ... ok\ntest_mixed_case (test_palindrome.TestPalindrome.test_mixed_case) ... ok\ntest_not_palindrome_sentence (test_palindrome.TestPalindrome.test_not_palindrome_sentence) ... ok\ntest_punctuation_and_case (test_palindrome.TestPalindrome.test_punctuation_and_case) ... ok\ntest_single (test_palindrome.TestPalindrome.test_single) ... ok\n\n----------------------------------------------------------------------\nRan 7 tests in 0.000s\n\nOK\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":1}`
latency	wall_clock_ms, container_active_ms, model_call_ms	`{"wall_clock_ms":109272.527,"container_active_ms":109259.46999999999,"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/palindrome.py"],"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/palindrome.py"],"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":false,"refusal_correct":null,"marker_hits":[],"keyword_hits":[]}`
integrity	integrity, not_applicable, task_id	`{"integrity":1,"not_applicable":true,"task_id":"polyglot/python-palindrome-check"}`
composite	composite, weights, components, note	{"composite":0.8365212453200888,"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":109272.527,"expected_refusal":false,"refusal_produced":false,"cost_efficiency":1,"latency_efficiency":0.48157020689582974,"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

speedt = 0 ms / 109.27 s

span 86c46d62c6574c1aaed81ca53706d6b8task_setupprepare:polyglot/python-palindrome-check0 ms → 12 ms

workdir/tmp/codingagentbench-scratch/codingagentbench-aider-polyglot_python-palindrome-check-0dkfqasi/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/python-palindrome-check

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/python-palindrome-check
# 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
86c46d62c6574c1aaed81ca53706d6b8	task_setup	prepare:polyglot/python-palindrome-check	12 ms	`{"workdir":"/tmp/codingagentbench-scratch/codingagentbench-aider-polyglot_python-palindrome-check-0dkfqasi/workdir","task_category":"polyglot","plugin_stack":[],"behavior_mode":"factory"}`
2ab9ebc90f28405ba207bb158a1bd27b ↳ 9465eae0787b4bd8bd86fc1b6be0d0a0	task_setup	aider:git-init-marker	0 ms	`{"workdir":"/tmp/codingagentbench-scratch/codingagentbench-aider-polyglot_python-palindrome-check-0dkfqasi/workdir","git_dir_exists":true}`
d65ddab450ba4e25b902db46edd3ca8c ↳ 9465eae0787b4bd8bd86fc1b6be0d0a0	tool_call	applied_plugins	0 ms	`{"tui":"aider","count":0,"applied":[],"env_keys":[],"extra_args":[],"applied_count":0,"skipped_count":0}`
2d76dcafebcf4e0ca80921c1b4d88e87 ↳ 9465eae0787b4bd8bd86fc1b6be0d0a0	container	aider:launch	109260 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","Detect palindromes, ignoring case and non-alphanumerics; current impl drops punctuation but not case"],"timeout_s":600,"exit_code":0,"duration_s":109.23600537699531,"timed_out":false}
9465eae0787b4bd8bd86fc1b6be0d0a0	adapter_run	aider:polyglot/python-palindrome-check	109260 ms	`{"timeout_s":600,"plugin_stack":[],"exit_code":0}`
50c979ba2e1346da8dc3eb7efe0430a5	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: 1,000 prompt + 1,500 completion tokens.

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[![CodingAgentBench: aider × stepfun-ai/step-3.5-flash 84%](https://codingagentbench.com/badge/aider/stepfun-ai/step-3.5-flash/polyglot/python-palindrome-check.svg)](https://codingagentbench.com/cell/aider/stepfun-ai/step-3.5-flash/polyglot/python-palindrome-check)

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