Anthropic's new flagship for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5.
xAI's agentic build model for autonomous software engineering.
No shared demos for these models yet.
No captured outputs for these models yet.
Both Claude Opus 5.5 and Grok Build 0.1 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.
Grok Build 0.1 has a lower blended cost. Claude Opus 5.5: $4.00 input / $20.00 output. Grok Build 0.1: $1.00 input / $2.00 output.
Claude Opus 5.5 has a larger context window: Claude Opus 5.5 supports 1M tokens vs Grok Build 0.1 at 256K tokens.
Yes, both Claude Opus 5.5 and Grok Build 0.1 support vision/image input.
Key differences: Grok Build 0.1 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 Grok Build 0.1 for free on idapt.app to see which performs better for your specific needs.