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CodingAgentBench

openhands × mistralai/mistral-small-4-119b-2603

polyglot
polyglot/go-json-parser-fix
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
214.8s
Blast
0.000
Refusal
—
Integrity
1.000
Composite
0.514

Run identity

cell_id
free-20260527/openhands/mistralai/mistral-small-4-119b-2603/polyglot/go-json-parser-fix
sweep_id
free-20260527
container_image
codingagentbench/openhands:1.7.0
image_digest
sha256:7fcaf222644a5cb0afffe018f038d270130b5af3b8af366cd960f2d596a4342c
model_build_id
mistralai/mistral-small-4-119b-2603
exit_code
1

Timing

started_at
2026-05-31T20:10:50.193882Z
ended_at
2026-05-31T20:14:24.963948Z
duration
214.77 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":"--- FAIL: TestMarshal_IncludesZeroCount (0.00s)\n parser_test.go:26: zero count dropped: got map[name:x] want map[count:0 name:x]\n--- FAIL: TestMarshal_EmptyName (0.00s)\n parser_test.go:42: got map[name:] want map[count:0 name:]\nFAIL\nFAIL\tcodingagentbench/gojsonparser\t0.002s\nFAIL\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":0}
latency wall_clock_ms, container_active_ms, model_call_ms {"wall_clock_ms":214770.06600000002,"container_active_ms":214769.391,"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":"polyglot/go-json-parser-fix"}
composite composite, weights, components, note {"composite":0.5137826024090211,"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":214770.06600000002,"expected_refusal":false,"refusal_produced":false,"cost_efficiency":1,"latency_efficiency":0.42521734939347366,"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 / 214.77 s
span 8f2f97a896d742608c4ca84562319c66task_setupprepare:polyglot/go-json-parser-fix0 ms → 1 ms
workdir/home/andrew/.codingagentbench-scratch/codingagentbench-openhands-polyglot_go-json-parser-fix-cfm2t7cb/workdir
task_categorypolyglot
plugin_stack[]
behavior_modefactory

Watch it get throttled

the agent exhausted its retries against the provider's rate limit (HTTP 429) before doing any work

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 mistralai/mistral-small-4-119b-2603 \
    --task polyglot/go-json-parser-fix

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: mistralai/mistral-small-4-119b-2603
Zero-install preview — npx CLI (provisional, not for citation)
npx @codingagentbench/cli check
npx @codingagentbench/cli check \
  --tui openhands \
  --model mistralai/mistral-small-4-119b-2603 \
  --endpoint "$YOUR_ENDPOINT" \
  --key "$YOUR_KEY" \
  --task polyglot/go-json-parser-fix
# 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
8f2f97a896d742608c4ca84562319c66 task_setup prepare:polyglot/go-json-parser-fix 1 ms {"workdir":"/home/andrew/.codingagentbench-scratch/codingagentbench-openhands-polyglot_go-json-parser-fix-cfm2t7cb/workdir","task_category":"polyglot","plugin_stack":[],"behavior_mode":"factory"}
f3af5432d73c43f685f6e27226d8886a ↳ 42005724e478428e8e4f39f99dfda5ea tool_call applied_plugins 0 ms {"tui":"openhands","count":0,"applied":[],"env_keys":[],"extra_args":[],"applied_count":0,"skipped_count":0}
1c3ded6a36cf4295affefb42d2eb6773 ↳ 42005724e478428e8e4f39f99dfda5ea container openhands:run 214769 ms {"image":"codingagentbench/openhands:1.7.0","command":["/app/.venv/bin/python","/opt/openhands_run.py","-t","JSON parser drops zero-valued fields because of `omitempty` on a required field","--workspace","/workspace"],"deviation":"root+docker.sock; see module docstring","exit_code":1,"timed_out":false,"docker_sock_mounted":true,"read_only":false}
42005724e478428e8e4f39f99dfda5ea adapter_run openhands:polyglot/go-json-parser-fix 214769 ms {"timeout_s":600,"plugin_stack":[],"exit_code":1}
65e70c17ecea4a4e859e55e2dc45122e 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 × mistralai/mistral-small-4-119b-2603 51%