Z.ai: GLM 5.1

Pricing, context window and lifecycle for z-ai/glm-5.1, tracked from what the vendor publishes.

Price per million tokens

Facts

Supported parameters

frequency_penalty, include_reasoning, logit_bias, logprobs, max_tokens, min_p, presence_penalty, reasoning, repetition_penalty, response_format, seed, stop, structured_outputs, temperature, tool_choice, tools, top_k, top_logprobs, top_p

Other Z.ai models

• z-ai/glm-4.5 $0.600 in / $2.20 out
• z-ai/glm-4.5-air $0.130 in / $0.850 out
• z-ai/glm-4.5v $0.600 in / $1.80 out
• z-ai/glm-4.6 $0.500 in / $2.00 out
• z-ai/glm-4.6v $0.300 in / $0.900 out
• z-ai/glm-4.7 $0.400 in / $1.75 out
• z-ai/glm-4.7-flash $0.060 in / $0.400 out
• z-ai/glm-5 $0.950 in / $2.55 out
• z-ai/glm-5-turbo $1.20 in / $4.00 out
• z-ai/glm-5.2 $0.629 in / $1.98 out