GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....
Model details →OpenAI: GPT-5.1-Codex vs Z.ai: GLM 5V Turbo
Z.ai: GLM 5V Turbo wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
GLM-5V-Turbo is Z.ai’s first native multimodal agent foundation model, built for vision-based coding and agent-driven tasks. It natively handles image, video, and text inputs, excels at long-horizon planning, complex coding,...
Model details →Side-by-side comparison
| Capability | OpenAI: GPT-5.1-Codex | Z.ai: GLM 5V Turbo | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 400K | 203K | 🏆 OpenAI: GPT-5.1-Codex |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $1.25 | $1.20 | 🏆 Z.ai: GLM 5V Turbo |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $10.00 | $4.00 | 🏆 Z.ai: GLM 5V Turbo |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is OpenAI: GPT-5.1-Codex better than Z.ai: GLM 5V Turbo?
Z.ai: GLM 5V Turbo wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between OpenAI: GPT-5.1-Codex and Z.ai: GLM 5V Turbo?
Input: $1.25 vs $1.20 per 1M tokens. Output: $10.00 vs $4.00 per 1M tokens.
What context windows do OpenAI: GPT-5.1-Codex and Z.ai: GLM 5V Turbo support?
OpenAI: GPT-5.1-Codex supports up to 400K tokens. Z.ai: GLM 5V Turbo supports up to 203K tokens.
Do both OpenAI: GPT-5.1-Codex and Z.ai: GLM 5V Turbo support tool calling?
OpenAI: GPT-5.1-Codex: yes. Z.ai: GLM 5V Turbo: yes.
Compare OpenAI: GPT-5.1-Codex with other models
vs Anthropic Claude Haiku Latestvs Anthropic Claude Sonnet Latestvs Anthropic: Claude Fable Latestvs Anthropic: Claude Opus Latest