Z.ai: GLM 5.3 Flash (batch)

Z.ai's GLM 5.3 Flash (batch) accepts text, image, and video inputs, so it can serve mixed-media pipelines without a separate vision model. Its context window is 1,048,576 tokens, with up to 131,072 tokens per completion, which leaves room for very long documents or extended outputs in a single call. It supports tool calling and a reasoning mode. Structured output support and open-weights status are not listed, so confirm both before depending on them. At $0.06 per million input tokens and $0.20 per million output tokens, this model belongs on shortlists for high-volume or long-context workloads where per-token cost drives the decision. Its blended benchmark score of 70.6 rests on a single independent benchmark (AI Index score 69.0), so its standing is only lightly evidenced. Teams should test it on their own tasks before committing.