Explain a bug in plain language
bug-explanation · v1
Explain a small defect to a teammate who does not know the code. The rubric scores correctness, causality, and whether the explanation names a next step. It is not a pass/fail unit test.
Bench / Episodes / Bug explanation & support reply · 4 models
Navigator Bench episode
Bug explanation & support reply · 4 models
Explain a bug in plain language, Tone-matched support reply, Ambiguous ticket reply, Conflicting status update · openai/gpt-4o-mini vs google/gemini-2.5-flash vs google/gemini-3.1-flash-lite vs deepseek/deepseek-chat-v3.1
As of Oct 1, 2026, 8:46 PM ET (runs stored from Oct 1, 2026, 8:45 PM ET). 16 stored runs. Methodology
A rank on this page is best_fit_for_inputs for one task, volume, and budget. It is not a universal winner.
Tasks
Tone-matched support reply
tone-matched-reply · v1
Draft a reply that matches a stated tone and does not promise a refund the policy forbids. The rubric is the score. A human spot check is still required before a comparison that includes this task is published.
Ambiguous ticket reply
ambiguous-ticket-reply · v1
The customer says only that it is happening again. The reply has to ask for the missing facts and must not invent a product, a diagnosis, or a refund. Incomplete instructions are the point of the task.
Conflicting status update
conflicting-status-update · v1
The instructions demand a 25-word cap and a list of facts that cannot all fit inside that cap. The useful failure is which constraint the model drops, or whether it says the constraints conflict.
Models: openai/gpt-4o-mini, google/gemini-2.5-flash, google/gemini-3.1-flash-lite, deepseek/deepseek-chat-v3.1
Methodology: v1
Published:
Candidate runs total: 0.00252859
Judge cost: 0.0010700
Total (candidate + judge): 0.00359859
Amounts are the exact stored decimal strings. No rounding is applied. candidate_cost_usd is the sum of measured run costs. judge_cost_usd is the sum of stored tier-2 judge ledger rows, or null when none were recorded. total_cost_usd equals candidate plus judge only when every candidate cost is present and a judge cost was recorded.
Candidate costs are the measured amounts on the receipts below (16 runs).
Comparison 5f523c95-41ba-4957-bef4-4d87199e25ed
Funding visitor-key / video-demo
Stored runs
| Model | Task | Tier | Score | Latency | Measured cost | Receipt |
|---|---|---|---|---|---|---|
| google/gemini-3.1-flash-lite | Explain a bug in plain language | LLM judge | 629 ms | 0.00025025 | Run c619851e | |
| google/gemini-2.5-flash | Explain a bug in plain language | LLM judge | 1412 ms | 0.0005352 | Run 1ae2b197 | |
| openai/gpt-4o-mini | Explain a bug in plain language | LLM judge | 1585 ms | 0.0000957 | Run bc686e25 | |
| deepseek/deepseek-chat-v3.1 | Explain a bug in plain language | LLM judge | 530 ms | 0.00015081 | Run bf682c4a | |
| google/gemini-2.5-flash | Tone-matched support reply | LLM judge | 4/5 · mixedaccuracy 5 · tone_match 5 · completeness 3 · policy_safety 5Mixed resultHuman spot checkMethodology | 470 ms | 0.0001416 | Run 0923ba40 |
| openai/gpt-4o-mini | Tone-matched support reply | LLM judge | 535 ms | 0.00005445 | Run ad86ac26 | |
| google/gemini-3.1-flash-lite | Tone-matched support reply | LLM judge | 810 ms | 0.00014075 | Run 63b9f0b5 | |
| deepseek/deepseek-chat-v3.1 | Tone-matched support reply | LLM judge | 209 ms | 0.00008731 | Run 532ae9ba | |
| google/gemini-3.1-flash-lite | Ambiguous ticket reply | LLM judge | 846 ms | 0.00017125 | Run 1f9abacf | |
| google/gemini-2.5-flash | Ambiguous ticket reply | LLM judge | 435 ms | 0.0004158 | Run 45335487 | |
| openai/gpt-4o-mini | Ambiguous ticket reply | LLM judge | 1158 ms | 0.00008265 | Run e33803c8 | |
| deepseek/deepseek-chat-v3.1 | Ambiguous ticket reply | LLM judge | 1545 ms | 0.0001539 | Run 187597dc | |
| google/gemini-2.5-flash | Conflicting status update | LLM judge | 465 ms | 0.0000941 | Run 293f17b9 | |
| google/gemini-3.1-flash-lite | Conflicting status update | LLM judge | 484 ms | 0.00006775 | Run 260c89f2 | |
| openai/gpt-4o-mini | Conflicting status update | LLM judge | 3/5 · mixedaudience 5 · word_cap 5 · fact_coverage 5 · conflict_honesty 0Mixed resultHuman spot checkMethodology | 463 ms | 0.0000348 | Run 45ce890c |
| deepseek/deepseek-chat-v3.1 | Conflicting status update | LLM judge | 339 ms | 0.00005227 | Run e635c9ee |
Notable flags
- google/gemini-2.5-flash on Tone-matched support reply. 4/5 · mixed.Mixed result: completeness scored 3 or lower.
- google/gemini-3.1-flash-lite on Ambiguous ticket reply. 4/5 · mixed.Mixed result: tone scored 3 or lower.
- google/gemini-2.5-flash on Ambiguous ticket reply. 4/5 · mixed.Mixed result: tone scored 3 or lower.
- openai/gpt-4o-mini on Ambiguous ticket reply. 4/5 · mixed.Mixed result: tone scored 3 or lower.
- openai/gpt-4o-mini on Conflicting status update. 3/5 · mixed.Mixed result: conflict_honesty scored 3 or lower.
B-roll
Race, radar, run replay, fit walkthrough, PNG stills, and CSV stay marked todo. The links below are the artifacts that exist for this comparison.
JSON packet · Scatter · Checklist · Episode packet · Race (not generated)
Measured cost vs quality
Open in the interactive Bench · Comparison page · Episode packet · Checklist