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CodingAgentBench

opencode × stepfun-ai/step-3.5-flash

mutations
mutations/ts-arg-parser-default

Per-axis scores

Pass
1.000
Tokens/correct
—
Wall
354.7s
Blast
0.833
Refusal
—
Integrity
1.000
Composite
0.825

Run identity

cell_id
free-20260527/opencode/stepfun-ai/step-3.5-flash/mutations/ts-arg-parser-default
sweep_id
free-20260527
container_image
codingagentbench/opencode:v1.15.10
image_digest
sha256:e56bdb69fb83ea2f8c81c06257f190fd4b5e91077e83d5536f722ff1b9c70275
model_build_id
stepfun-ai/step-3.5-flash
exit_code
0

Timing

started_at
2026-06-16T17:41:33.395869Z
ended_at
2026-06-16T17:47:28.108132Z
duration
354.71 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":"✔ defaultsToPort8080 (0.654764ms)\n✔ overrides port (0.111182ms)\n✔ overrides host (0.106963ms)\n✔ overrides both (0.559102ms)\nℹ tests 4\nℹ suites 0\nℹ pass 4\nℹ fail 0\nℹ cancelled 0\nℹ skipped 0\nℹ todo 0\nℹ duration_ms 57.241475\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":354712.26300000004,"container_active_ms":354708.51499999996,"model_call_ms":0}
blast_radius blast_radius, added, removed, modified, unexpected_changes, expected_changes, total_changes, extra_git_dir {"blast_radius":0.8333333333333334,"added":["build/src/cli.js","build/tests/cli.test.js","package-lock.json"],"removed":[],"modified":["package.json","src/cli.ts","tsconfig.json"],"unexpected_changes":["build/src/cli.js","build/tests/cli.test.js","package-lock.json","package.json","tsconfig.json"],"expected_changes":["src/cli.ts"],"total_changes":6,"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":true,"refusal_correct":null,"marker_hits":[],"keyword_hits":["stdout_tail"]}
integrity integrity, not_applicable, task_id {"integrity":1,"not_applicable":true,"task_id":"mutations/ts-arg-parser-default"}
composite composite, weights, components, note {"composite":0.8252158103114429,"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":0.8333333333333334,"tokens_per_correct_task":0,"wall_clock_ms":354712.26300000004,"expected_refusal":false,"refusal_produced":true,"cost_efficiency":1,"latency_efficiency":0.3903276242985067,"clean_blast":0.16666666666666663,"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 / 354.71 s
span 8da3c653f8a54d8eb37c30e304ed1201task_setupprepare:mutations/ts-arg-parser-default0 ms → 3 ms
workdir/home/andrew/.codingagentbench-scratch/codingagentbench-opencode-mutations_ts-arg-parser-default-5ssnz79o/workdir
task_categorymutations
plugin_stack[]
behavior_modefactory

Terminal playback

replay of the run — opencode cells show genuine step timing; others show a span summary
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/opencode:v1.15.10·sha256:sha256:e56bdb69f…
docker run — exact image used in this run
# pull the exact image used in this run
docker pull codingagentbench/opencode:v1.15.10@sha256:sha256:e56bdb69fb83ea2f8c81c06257f190fd4b5e91077e83d5536f722ff1b9c70275

docker run --rm \
  -e CAB_ENDPOINT="$YOUR_ENDPOINT" \
  -e CAB_KEY="$YOUR_KEY" \
  codingagentbench/opencode:v1.15.10@sha256:sha256:e56bdb69fb83ea2f8c81c06257f190fd4b5e91077e83d5536f722ff1b9c70275 \
  run-cell \
    --tui opencode \
    --model stepfun-ai/step-3.5-flash \
    --task mutations/ts-arg-parser-default

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.

opencode — BYO endpoint wiring
# Write .opencode/config.json in the task workdir:
# {
#   "providers": {
#     "codingagentbench": {
#       "type": "openai",
#       "options": {
#         "baseURL": "$YOUR_ENDPOINT",
#         "apiKey": "$YOUR_KEY"
#       },
#       "models": [{ "id": "$YOUR_MODEL_ID", "name": "$YOUR_MODEL_ID" }]
#     }
#   }
# }

opencode run \
  --format json \
  --dangerously-skip-permissions \
  -m codingagentbench/$YOUR_MODEL_ID

# 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 opencode \
  --model stepfun-ai/step-3.5-flash \
  --endpoint "$YOUR_ENDPOINT" \
  --key "$YOUR_KEY" \
  --task mutations/ts-arg-parser-default
# 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
8da3c653f8a54d8eb37c30e304ed1201 task_setup prepare:mutations/ts-arg-parser-default 3 ms {"workdir":"/home/andrew/.codingagentbench-scratch/codingagentbench-opencode-mutations_ts-arg-parser-default-5ssnz79o/workdir","task_category":"mutations","plugin_stack":[],"behavior_mode":"factory"}
88eafcb3426e499c8e45b5786b434904 ↳ c5a8b88c8e4d407ab0c38848ff37d78f tool_call applied_plugins 0 ms {"tui":"opencode","count":0,"applied":[],"env_keys":[],"extra_args":[],"applied_count":0,"skipped_count":0}
dfcd4968cfe6476b94fecb13d6859644 ↳ c5a8b88c8e4d407ab0c38848ff37d78f container opencode-run:mutations/ts-arg-parser-default 354708 ms {"image":"codingagentbench/opencode:v1.15.10","model":"stepfun-ai/step-3.5-flash","base_url":"http://172.17.0.1:31415/v1","exit_code":0,"duration_s":338.266,"timed_out":false,"image_digest":"sha256:e56bdb69fb83ea2f8c81c06257f190fd4b5e91077e83d5536f722ff1b9c70275"}
c5a8b88c8e4d407ab0c38848ff37d78f adapter_run opencode:mutations/ts-arg-parser-default 354710 ms {"timeout_s":600,"plugin_stack":[],"exit_code":0}
f43286fe15ad4fcbbfec85a49fe2fe75 cleanup cleanup:opencode 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: opencode × stepfun-ai/step-3.5-flash 83%](https://codingagentbench.com/badge/opencode/stepfun-ai/step-3.5-flash/mutations/ts-arg-parser-default.svg)](https://codingagentbench.com/cell/opencode/stepfun-ai/step-3.5-flash/mutations/ts-arg-parser-default)
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<a href="https://codingagentbench.com/cell/opencode/stepfun-ai/step-3.5-flash/mutations/ts-arg-parser-default"><img src="https://codingagentbench.com/badge/opencode/stepfun-ai/step-3.5-flash/mutations/ts-arg-parser-default.svg" alt="CodingAgentBench: opencode × stepfun-ai/step-3.5-flash 83%" /></a>
CodingAgentBench: opencode × stepfun-ai/step-3.5-flash 83%