PromptCube
A forum for people actually running AI in production
About PromptCube
PromptCube is a discussion forum for people working with AI rather than a tool that does something. Threads cover prompting, model selection, agent design and the practical tooling questions that sit between a model and a working system.
It is worth being clear that this is a community, not software, which makes it an unusual entry in a tools directory. The reason it earns a place is that the questions it exists to answer are the ones no documentation covers: which model is actually cheaper for a given job, whether a technique survives contact with production, what broke for someone else last week. That knowledge is scattered across Discord servers and disappears, and a searchable forum is a better shape for it.
The usual caveat about forums applies. A community is only worth what its participants know, and that is not something a description can establish. Read a few threads on a subject you already understand well, and judge the quality of the answers against what you know. That test takes ten minutes and tells you more than any feature list.
You read. Nothing gates the content and no account is required to start, which is the right default for a forum hoping to be found through search.
Discussion is organised by topic, covering prompts, models, agents and the tooling around them, so a question about cost per token sits somewhere different from one about agent orchestration.
Posts include worked examples with real figures, which is the useful register for this subject: a claim that one model is cheaper means little without the arithmetic, and the arithmetic is what the model providers' own documentation leaves out.
Participating requires an account. Reading does not.
- •Practitioner discussion - aimed at people running AI rather than reading about it.
- •Topic organisation - prompts, models, agents and tooling separated rather than one feed.
- •Free and open to read - no account needed to get value.
- •Worked cost examples - the arithmetic providers tend to omit.
- •Searchable - which is the advantage over the Discord servers where this knowledge usually lives and then vanishes.
Developers and builders shipping something with AI in it, who have hit the questions that documentation does not answer and want to know what worked for someone else.
Anyone comparing models on real cost rather than benchmark scores, where practitioner reports beat vendor claims.
It is not a tool and will not do anything for you, so judge it as you would any forum: by reading threads on something you already know well, and seeing whether the answers hold up. If they do not, nothing else about it matters.
