Decision boundary
Do not start with which model is absolutely stronger. Start with the boundary: cost, context, speed, quality, ecosystem, or supply stability.
- Claude Haiku 3.5 is worth checking first when the Claude family, 200K context, and text+image->text capability match the job.
- Qwen3.5 Flash is worth checking first when the Qwen3.5-Flash family, 1M context, and text->text capability match the job.