Fast version of Grok 4 with SOTA cost-efficiency and 2M-token context.
OpenAI's new flagship for demanding end-to-end work: advanced analysis, software engineering, deep research, scientific work, and document creation.
No shared demos for these models yet.
No captured outputs for these models yet.
Both Grok 4 Fast and GPT 6 Astra 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 Fast has a larger context window: Grok 4 Fast supports 2M tokens vs GPT 6 Astra at 1.1M tokens.
Yes, both Grok 4 Fast and GPT 6 Astra support vision/image input.
Key differences: only GPT 6 Astra offers extended reasoning mode. 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 Grok 4 Fast and GPT 6 Astra for free on idapt.app to see which performs better for your specific needs.