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 4.6
OpenAI: GPT-5.1-Codex-Max and Z.ai: GLM 4.6 are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
Compared with GLM-4.5, this generation brings several key improvements: Longer context window: The context window has been expanded from 128K to 200K tokens, enabling the model to handle more complex...
Model details →Side-by-side comparison
| Capability | OpenAI: GPT-5.1-Codex-Max | Z.ai: GLM 4.6 | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 400K | 205K | 🏆 OpenAI: GPT-5.1-Codex-Max |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $1.25 | $0.50 | 🏆 Z.ai: GLM 4.6 |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $10.00 | $2.00 | 🏆 Z.ai: GLM 4.6 |
| 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 4.6?
OpenAI: GPT-5.1-Codex-Max and Z.ai: GLM 4.6 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-5.1-Codex-Max and Z.ai: GLM 4.6?
Input: $1.25 vs $0.50 per 1M tokens. Output: $10.00 vs $2.00 per 1M tokens.
What context windows do OpenAI: GPT-5.1-Codex-Max and Z.ai: GLM 4.6 support?
OpenAI: GPT-5.1-Codex-Max supports up to 400K tokens. Z.ai: GLM 4.6 supports up to 205K tokens.
Do both OpenAI: GPT-5.1-Codex-Max and Z.ai: GLM 4.6 support tool calling?
OpenAI: GPT-5.1-Codex-Max: yes. Z.ai: GLM 4.6: yes.
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