I'll repeat something I wrote on an entirely separate HN submission.

When DeepSeek V4 Pro came out, I had been mostly coding with GLM-5.1 on a Z.ai coding plan.

I had a large analysis task on a relatively complex codebase. I decided to try the models out.

GLM-5.1 did acceptably but got a few things wrong (easily corrected) and took quite a while to get there.

Opus 4.6 burnt through the US$10 budget I had given it in about 10-15 min, without ever returning from the first prompt.

DeepSeek V4 returned a full analysis within 2-3 min, and I carried on all the way to implementing the feature I was after. Total cost less than US$1.00.

I now mostly alternate between GLM-5.1 and DeepSeek V4 Flash, with an occasional dip into V4 Pro for more complex analyses.