September 2025 checkpoint of Kimi K2 with improved capabilities.
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 Kimi K2 (0905) 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.
Kimi K2 (0905) has a lower blended cost. Kimi K2 (0905): $0.60 input / $2.50 output. GPT 6 Astra: $10.00 input / $50.00 output.
GPT 6 Astra has a larger context window: Kimi K2 (0905) supports 262K tokens vs GPT 6 Astra at 1.1M tokens.
GPT 6 Astra supports vision/image input, but Kimi K2 (0905) does not.
Key differences: Kimi K2 (0905) is significantly cheaper; only GPT 6 Astra supports vision input; 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 Kimi K2 (0905) and GPT 6 Astra for free on idapt.app to see which performs better for your specific needs.