GPT-6 Astra

GPT-6 Astra is OpenAI's flagship model for complex end-to-end work, positioned as the successor to the GPT-5.6 series with an expanded 1.05M token context window.

Strengths

Excels at advanced analysis, software engineering, deep research, scientific work, and document creation, with particular strengths in long-horizon reasoning and multi-step problem solving across extended contexts.

Best for

Demanding tasks that require sustained reasoning over large documents, codebases, or research datasets, and work requiring both breadth and depth of understanding.

Limitations

As OpenAI's most capable general-purpose model, it may not be optimized for resource-constrained deployments or scenarios where a smaller, faster model would suffice.