OpenAI · stable
GPT-5 nano is a proprietary model variant recorded in the BenchLM public dataset.
Specialist evidence
Source-native operational evidence for GPT-5 nano. Exact configurations remain separate. Costs are comparable only within the same selected benchmark/evaluation, and these rows never enter Overall Score.
| Evaluation | Exact configuration | Performance | Cost / task | Tokens / task | Execution |
|---|---|---|---|---|---|
| SWE-bench Owner Leaderboards · owner-current · bash-only SWE-bench Owner Leaderboards · checked 2026-08-29 | gpt-5-nano-medium GPT 5 nano (2025-08-07) (medium) | 34.8% | $0.038 | — | 39.8 calls |
| SWE-bench Owner Leaderboards · owner-current · verified SWE-bench Owner Leaderboards · checked 2026-08-29 | gpt-5-nano-medium mini-SWE-agent + GPT 5 nano (2025-08-07) (medium) | 34.8% | $0.038 | — | 39.8 calls |
