GPT-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasoning stack and trained on agentic...
Model details →OpenAI: GPT-5.1-Codex-Max vs Z.ai: GLM 5.2 (batch)
Z.ai: GLM 5.2 (batch) wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
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-5.1-Codex-Max | Z.ai: GLM 5.2 (batch) | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 400K | 512K | 🏆 Z.ai: GLM 5.2 (batch) |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $1.25 | $0.70 | 🏆 Z.ai: GLM 5.2 (batch) |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $10.00 | $2.20 | 🏆 Z.ai: GLM 5.2 (batch) |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | — | 🏆 OpenAI: GPT-5.1-Codex-Max |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is OpenAI: GPT-5.1-Codex-Max better than Z.ai: GLM 5.2 (batch)?
Z.ai: GLM 5.2 (batch) wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between OpenAI: GPT-5.1-Codex-Max and Z.ai: GLM 5.2 (batch)?
Input: $1.25 vs $0.70 per 1M tokens. Output: $10.00 vs $2.20 per 1M tokens.
What context windows do OpenAI: GPT-5.1-Codex-Max and Z.ai: GLM 5.2 (batch) support?
OpenAI: GPT-5.1-Codex-Max supports up to 400K tokens. Z.ai: GLM 5.2 (batch) supports up to 512K tokens.
Do both OpenAI: GPT-5.1-Codex-Max and Z.ai: GLM 5.2 (batch) support tool calling?
OpenAI: GPT-5.1-Codex-Max: yes. Z.ai: GLM 5.2 (batch): yes.
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