GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for...
Model details →OpenAI: GPT-5.6 Luna vs Z.ai: GLM 5.2
OpenAI: GPT-5.6 Luna and Z.ai: GLM 5.2 are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
GLM 5.2 is a large-scale reasoning model from Z.ai. It supports text input and output with a 1M-token context window, and is suited for long-horizon agent workflows, project-level software engineering,...
Model details →Side-by-side comparison
| Capability | OpenAI: GPT-5.6 Luna | Z.ai: GLM 5.2 | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1.1M | 1.0M | 🏆 OpenAI: GPT-5.6 Luna |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.10 | $0.10 | 🏆 Z.ai: GLM 5.2 |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $0.60 | $0.31 | 🏆 Z.ai: GLM 5.2 |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | — | 🏆 OpenAI: GPT-5.6 Luna |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is OpenAI: GPT-5.6 Luna better than Z.ai: GLM 5.2?
OpenAI: GPT-5.6 Luna and Z.ai: GLM 5.2 are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
What's the price difference between OpenAI: GPT-5.6 Luna and Z.ai: GLM 5.2?
Input: $0.10 vs $0.10 per 1M tokens. Output: $0.60 vs $0.31 per 1M tokens.
What context windows do OpenAI: GPT-5.6 Luna and Z.ai: GLM 5.2 support?
OpenAI: GPT-5.6 Luna supports up to 1.1M tokens. Z.ai: GLM 5.2 supports up to 1.0M tokens.
Do both OpenAI: GPT-5.6 Luna and Z.ai: GLM 5.2 support tool calling?
OpenAI: GPT-5.6 Luna: yes. Z.ai: GLM 5.2: yes.
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