Inception's latest diffusion LLM and the fastest reasoning model available, producing and refining tokens in parallel instead of one at a time.
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 Mercury 2.5 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.
Mercury 2.5 has a lower blended cost. Mercury 2.5: $0.04 input / $0.15 output. GLM 5.3: $1.40 input / $4.40 output.
GLM 5.3 has a larger context window: Mercury 2.5 supports 260K tokens vs GLM 5.3 at 1M tokens.
Key differences: Mercury 2.5 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 Mercury 2.5 and GLM 5.3 for free on idapt.app to see which performs better for your specific needs.