Anthropic's new flagship for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 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 Opus 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 Opus 5.5: $4.00 input / $20.00 output. GLM 5.3 FlashX: $0.37 input / $1.25 output.
GLM 5.3 FlashX has a larger context window: Claude Opus 5.5 supports 1M tokens vs GLM 5.3 FlashX at 1M tokens.
Yes, both Claude Opus 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 Opus 5.5 and GLM 5.3 FlashX for free on idapt.app to see which performs better for your specific needs.