Chalk one up for the frontier model...

A developer spent two hours debugging a production CLI app error where EF Core choked on a Contains query involving a readonlyspan after an update, despite no code changes. While Qwen 3.8 27b failed to find a solution, switching to GPT Sol with the full context resolved the issue in two minutes. The developer emphasized that this highlights how 27b models are not "near-frontier" in many cases, despite optimistic claims, and that the choice of Sol was incidental.