OpenAI's GPT-5.6 flagship — built for complex reasoning, agentic coding, and long-running professional work.
xAI's smartest model, with frontier performance on coding, knowledge work, and STEM.
No shared demos for these models yet.
No captured outputs for these models yet.
Both GPT 5.6 Sol and Grok 4.6 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.
Grok 4.6 has a lower blended cost. GPT 5.6 Sol: $5.00 input / $30.00 output. Grok 4.6: $2.00 input / $6.00 output.
GPT 5.6 Sol has a larger context window: GPT 5.6 Sol supports 1.1M tokens vs Grok 4.6 at 500K tokens.
Yes, both GPT 5.6 Sol and Grok 4.6 support vision/image input.
Key differences: Grok 4.6 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 GPT 5.6 Sol and Grok 4.6 for free on idapt.app to see which performs better for your specific needs.