Anthropic's Sonnet-class model for well-scoped everyday work, a direct upgrade over Claude Sonnet 5.
Z.ai's high-speed variant of GLM 5.3 Flash, generating up to 200 tokens per second.
No shared demos for these models yet.
No captured outputs for these models yet.
Both Claude Sonnet 5.5 and GLM 5.3 FlashX 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 FlashX has a lower blended cost. Claude Sonnet 5.5: $2.00 input / $10.00 output. GLM 5.3 FlashX: $0.37 input / $1.25 output.
GLM 5.3 FlashX has a larger context window: Claude Sonnet 5.5 supports 1M tokens vs GLM 5.3 FlashX at 1M tokens.
Yes, both Claude Sonnet 5.5 and GLM 5.3 FlashX support vision/image input.
Key differences: GLM 5.3 FlashX is significantly cheaper. 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 5.5 and GLM 5.3 FlashX for free on idapt.app to see which performs better for your specific needs.