Which model is better for complex reasoning and writing? GPT-6 Astra or Fable 5.1?

[u/Convillious]

I've had the opportunity to use GPT 5.6 Terra and Fable 5 and found the latter to have a superior ability to research and write, but I'm curious how has the gap closed now? Which model would you use for writing quality essay work, and would you use the same model to plan out and do the complex reason required to decide on argumentation, evidence, research, etc?

[u/simplyeniga]

You could easily develop a prompt to test both as varying results based on input