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Z.ai: GLM 5.1

z-ai/glm-5.1
Apr 7, 2026202.8K context131.1K max output$1.40/M in · $4.40/M outReasoning

Description

GLM-5.1 delivers a major leap in coding capability, with particularly significant gains in handling long-horizon tasks. Unlike previous models built around minute-level interactions, GLM-5.1 can work independently and continuously on a single task for more than 8 hours, autonomously planning, executing, and improving itself throughout the process, ultimately delivering complete, engineering-grade results.

Specifications

Provider
z-ai
Context Length
202.8K
Max Output
131.1K
Modality
Intext
Outtext

Pricing

TypePrice / 1M tokens
Input$1.40
Output$4.40
Cache Read$0.26

Quick Start

curl https://api.ominigate.ai/v1/chat/completions \
  -H "Authorization: Bearer sk-omg-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "z-ai/glm-5.1",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
Z.ai: GLM 5.1 — Pricing & API on OminiGate