GPT‑5.6 Sol beats rivals on cost, speed and deep reasoning
Zvi Mowshowitz says OpenAI’s GPT‑5.6 Sol delivers the best trade‑off of reasoning quality, speed and cost among today’s frontier models. Its long‑horizon execution and compute scaling let it tackle hard reasoning tasks while staying under $5 per million tokens, making it the go‑to workhorse for demanding knowledge work.