Z.ai's large-scale reasoning flagship for complex software engineering and long-horizon agent tasks.
xAI's agentic build model for autonomous software engineering.
No shared demos for these models yet.
No captured outputs for these models yet.
Both GLM 5.3 and Grok Build 0.1 are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.
Grok Build 0.1 has a lower blended cost. GLM 5.3: $1.40 input / $4.40 output. Grok Build 0.1: $1.00 input / $2.00 output.
GLM 5.3 has a larger context window: GLM 5.3 supports 1M tokens vs Grok Build 0.1 at 256K tokens.
Grok Build 0.1 supports vision/image input, but GLM 5.3 does not.
Key differences: only Grok Build 0.1 supports vision input. Compare full specs on this page.
If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both GLM 5.3 and Grok Build 0.1 for free on idapt.app to see which performs better for your specific needs.