FullStackArena Auction: GPT-5.6-sol, one instance per template
This private evidence release contains the complete September 7, 2026 Auction qualification run: one deterministic task from each of all 25 released templates, executed with five isolated website/database/clock replicas.
Result interpretation
- Raw framework result: 18/25 pass (72.0%).
- Manual trace-audited result: 17/25 pass (68.0%).
- Confirmed strict false positive: auction_454.
- Confirmed strict false negatives: none.
- Diagnostic LLM-judge disagreements are preserved but are not authoritative.
The raw files have not been rewritten to hide the disagreement. The authoritative
review is recorded in release_evidence/manual_audit.json, including the
task-level rationale and integrity hashes.
Layout
The task artifact shape follows FullStackArena's valid_runs/<site>/<mode>/<task>
convention. Because this was one five-worker run and every worker had an independent
deployment, database, clock, transport, run manifest, and signed content manifest,
the worker boundary is retained explicitly:
valid_runs/auction/gpt-5.6-sol_uncapped_no-include-time/worker_0/
valid_runs/auction/gpt-5.6-sol_uncapped_no-include-time/worker_1/
valid_runs/auction/gpt-5.6-sol_uncapped_no-include-time/worker_2/
valid_runs/auction/gpt-5.6-sol_uncapped_no-include-time/worker_3/
valid_runs/auction/gpt-5.6-sol_uncapped_no-include-time/worker_4/
Each worker root independently validates against
fullstackarena-run-artifacts/v1. Each task directory includes the trace,
structured steps, every screenshot (including the final state), conversations,
legacy request/response pairs, the complete model-call request/response ledger,
task log, and token summary. Run-level configuration, results, provenance,
validation, content manifests, and logs are stored at the corresponding worker root.
Aggregate evidence is in release_evidence/; task_index.json maps every task to
its template, worker, and audited classification. release_manifest.json hashes
every release payload file except itself. The immutable Hub revision is the
checksum for the manifest itself.
Privacy and access
This repository is intentionally private. Full trajectories contain screenshots, complete model/browser records, and deployment metadata. Automated secret scans found no API keys, bearer credentials, private keys, or runtime-auth files. Do not make this raw repository public without a separate sanitization and review.
Task index
| Template | Task | Worker | Strict | Diagnostic | Audited | Classification |
|---|---|---|---|---|---|---|
| auction_f01 | auction_409 | 0 | pass | pass | pass | true_positive |
| auction_f02 | auction_405 | 1 | pass | fail | pass | diagnostic_false_negative |
| auction_f03 | auction_519 | 2 | pass | pass | pass | true_positive |
| auction_f04 | auction_411 | 3 | pass | pass | pass | true_positive |
| auction_f05 | auction_420 | 4 | pass | pass | pass | true_positive |
| auction_f06 | auction_507 | 0 | pass | pass | pass | true_positive |
| auction_f07 | auction_500 | 1 | pass | pass | pass | true_positive |
| auction_f08 | auction_514 | 2 | pass | pass | pass | true_positive |
| auction_f09 | auction_510 | 3 | pass | pass | pass | true_positive |
| auction_f10 | auction_513 | 4 | fail | fail | fail | true_negative |
| auction_f11 | auction_535 | 0 | fail | fail | fail | true_negative |
| auction_f12 | auction_443 | 1 | pass | pass | pass | true_positive |
| auction_f13 | auction_223 | 2 | pass | pass | pass | true_positive |
| auction_f14 | auction_161 | 3 | pass | pass | pass | true_positive |
| auction_f15 | auction_460 | 4 | fail | pass | fail | diagnostic_false_positive |
| auction_f16 | auction_273 | 0 | pass | pass | pass | true_positive |
| auction_f17 | auction_303 | 1 | pass | pass | pass | true_positive |
| auction_f18 | auction_467 | 2 | fail | pass | fail | diagnostic_false_positive |
| auction_f19 | auction_454 | 3 | pass | fail | fail | strict_false_positive |
| auction_f20 | auction_540 | 4 | pass | pass | pass | true_positive |
| auction_f21 | auction_543 | 0 | fail | fail | fail | true_negative |
| auction_f22 | auction_493 | 1 | fail | fail | fail | true_negative |
| auction_f23 | auction_526 | 2 | fail | fail | fail | true_negative |
| auction_f24 | auction_504 | 3 | pass | pass | pass | true_positive |
| auction_f25 | auction_537 | 4 | pass | fail | pass | diagnostic_false_negative |
Reproducibility anchors
- FullStackArena commit:
de65f7683886255c7df149e850c00c25e17aad52 - Auction source commit:
58bc388aba6e15f9a0306a1a4051d24a0ca8c6ef - Task pack SHA-256:
beb8afc469f4a0b50dfe624b9da21e7d85f2dec550a32d0814579a07b056602d - Template pack SHA-256:
cc66517a30c2d83d5b9853c19b2517f46c3df96a549b9b66604eb701616d8943 - Selection digest:
0174737e7a503a11bf531925489e9aebd40bdd298f1a72b4b8334c6db542b472 - Experiment wall clock:
50m 12.9s(manual audit excluded) - Model calls:
460 - Total tokens:
5645360 - Recorded experiment cost:
$7.3989168
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