Reflection lists 1 models and Z Ai 23. Z Ai is cheaper on a typical model ($0.90 per 1M tokens median). Below: line-up, price tiers, the cheapest model for each capability, and what each costs for five real workloads.
For each workload: the cheapest model from each provider that can actually do it (fits the context window; tool calling required for the agent), and its monthly cost at list price.
Z Ai is cheaper on a typical model: a median of $0.90 per 1M tokens (3:1 input/output) against $1.50 for Reflection. The cheapest paid models are Reflection: Beam 1.0 501B A23B at $1.50 and Z.ai: GLM 5.3 Flash at $0.08.
Is Reflection better than Z Ai?
It depends on the job: Z Ai offers the broader line-up (1 models vs 23), Z Ai the lower typical price. The workload table above shows which wins for chat, RAG, agents, batch jobs and long documents.
Which has more models, Reflection or Z Ai?
Z Ai: Reflection lists 1 models and Z Ai lists 23.
Which provider has the longest context window?
It is a tie: Reflection's longest is Reflection: Beam 1.0 501B A23B at 1.0M tokens; Z Ai's is Z.ai: GLM 5.2 at 1.0M.
Do Reflection or Z Ai offer free models?
Reflection: none. Z Ai: 2 free models (e.g. Z.ai: GLM 4.5 Air (free)).
Which provider has models that can read images?
Reflection: 0 of 1 models accept images. Z Ai: 6 of 23.