Significantly enhanced over Sonnet 3.7 in coding and reasoning tasks.
Z.ai's large-scale reasoning flagship for complex software engineering and long-horizon agent tasks.
No shared demos for these models yet.
No captured outputs for these models yet.
Both Claude Sonnet 4 and GLM 5.3 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.
GLM 5.3 has a lower blended cost. Claude Sonnet 4: $3.00 input / $15.00 output. GLM 5.3: $1.40 input / $4.40 output.
GLM 5.3 has a larger context window: Claude Sonnet 4 supports 200K tokens vs GLM 5.3 at 1M tokens.
Claude Sonnet 4 supports vision/image input, but GLM 5.3 does not.
Key differences: GLM 5.3 is significantly cheaper; only Claude Sonnet 4 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 Claude Sonnet 4 and GLM 5.3 for free on idapt.app to see which performs better for your specific needs.