Z.ai's high-speed variant of GLM 5.3 Flash, generating up to 200 tokens per second.
Anthropic's upgraded Mythos-class flagship, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work.
No shared demos for these models yet.
No captured outputs for these models yet.
Both GLM 5.3 FlashX and Claude Fable 5.1 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.
GLM 5.3 FlashX has a lower blended cost. GLM 5.3 FlashX: $0.37 input / $1.25 output. Claude Fable 5.1: $10.00 input / $50.00 output.
GLM 5.3 FlashX has a larger context window: GLM 5.3 FlashX supports 1M tokens vs Claude Fable 5.1 at 1M tokens.
Yes, both GLM 5.3 FlashX and Claude Fable 5.1 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 GLM 5.3 FlashX and Claude Fable 5.1 for free on idapt.app to see which performs better for your specific needs.