Is Z.ai: GLM 5.1 or Z.ai: GLM 4.7 Flash cheaper?

Z.ai: GLM 4.7 Flash is cheaper on output tokens ($0.40 vs $3.08 per 1M).

Which has the larger context window, Z.ai: GLM 5.1 or Z.ai: GLM 4.7 Flash?

Both models offer a similar context window.

Z.ai: GLM 5.1 vs Z.ai: GLM 4.7 Flash

Z.ai: GLM 4.7 Flash is cheaper on output tokens. Choose Z.ai: GLM 5.1 or Z.ai: GLM 4.7 Flash based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Z.ai: GLM 5.1	Z.ai: GLM 4.7 Flash
Provider	Z.ai	Z.ai
Input / 1M tokens	$0.98	$0.06
Output / 1M tokens	$3.08	$0.40
Context window	203K	203K
Parameters	754B	—
Open weights	—	—
Released	Apr 2026	—

Z.ai: GLM 5.1 details →Z.ai: GLM 4.7 Flash details →

FAQ

Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.