Is zai-org/GLM-5.1 or deepseek-ai/DeepSeek-R1 cheaper?

deepseek-ai/DeepSeek-R1 is cheaper on output tokens ($2.18 vs $4.40 per 1M).

Which has the larger context window, zai-org/GLM-5.1 or deepseek-ai/DeepSeek-R1?

zai-org/GLM-5.1 has the larger context window (205K tokens).

zai-org/GLM-5.1 vs deepseek-ai/DeepSeek-R1

deepseek-ai/DeepSeek-R1 is cheaper on output tokens, while zai-org/GLM-5.1 offers a larger context window. Choose zai-org/GLM-5.1 or deepseek-ai/DeepSeek-R1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	zai-org/GLM-5.1	deepseek-ai/DeepSeek-R1
Provider	SiliconFlow	SiliconFlow
Input / 1M tokens	$1.40	$0.50
Output / 1M tokens	$4.40	$2.18
Context window	205K	164K
Parameters	754B	671B
Open weights	Yes	No
Released	Apr 2026	May 2025

zai-org/GLM-5.1 details →deepseek-ai/DeepSeek-R1 details →

FAQ

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