Pick a winner in each dimension — change your vote anytime.
Pricing and capabilities synced from the OpenRouter catalogue. Scores are editorial (0–10).
Choose Claude Haiku 4.5 if you want cheap, fast subtasks and subagents inside a larger workflow. Choose GPT-5.6 Sol if you want hard coding and research tasks for teams in the OpenAI ecosystem.
Editorially it's close: each model leads in 2 of our five dimensions. On price, Claude Haiku 4.5 runs about $2.20 per 1M tokens (blended) and is proprietary; GPT-5.6 Sol is about $13 and proprietary.
The model picks the moves; the agent runs the loop, the tools, and the guardrails. Once you've chosen a model, see which agent gets the most out of it.