OpenAI has officially unveiled its latest flagship AI architecture, ChatGPT 6 Astra, on September 3, 2026. The company says the new model represents a major jump in AI capabilities.Astra Trained on More Than 100,000 GPUsAstra was pretrained using more than 100,000 GPUs, giving it the computing power needed to handle demanding AI workloads. OpenAI says the architecture can outperform earlier models such as GPT-5.6 on complex tasks, including coding and logical reasoning.Designed for Complete Workflow AutomationUnlike traditional chatbots that primarily respond to individual prompts, Astra has been developed to handle broader, multi-step workflows. The model is designed to coordinate tasks across everyday computer environments, allowing it to go beyond generating responses and instead help complete entire processes.Built for Advanced AI WorkloadsOpenAI has designed Astra around infrastructure optimised for large-scale pretraining. The architecture is aimed at handling increasingly complex tasks and coordinating multiple steps across computer environments, reflecting the company's push towards more capable and autonomous AI systems.ChatGPT 6 Astra CostFast mode is available for GPT‑6 Astra in the API and delivers up to 2x the speed of Standard processing at 2x the Standard price, according to the official website.Token typePrice per 1 million tokensApprox. price in India*Input tokens$10₹940Cached input$1₹94Cache writes$12.50₹1,150Output tokens$50₹4,700ChatGPT 6 Astra New FeaturesOpenAI’s GPT-6 Astra, launched on September 3, 2026, brings major upgrades in computer use, coding, research and autonomous task completion. Key new features include:Computer-use safety stress test1. Better Coding and Software EngineeringThe model is designed for advanced software development, including writing, testing and debugging code. OpenAI describes it as its strongest model for software engineering to date.2. Multi-Step Workflow AutomationAstra can take a complex request, break it into multiple steps and work through the process with less human intervention. It can also adapt when users add new requirements or change direction.3. Documents, Spreadsheets and PresentationsThe model can create polished documents, spreadsheets and presentations based on a user's templates and instructions, making it more useful for professional and office work.Circumventing auto-review4. Improved BrowsingAstra is built to handle more demanding browser-based tasks, combining web navigation with reasoning and multi-step execution.ChatGPT 6 Astra vs Claude Fable 5.1BenchCAD (python tool)FeatureGPT-6 AstraClaude Fable 5.1CompanyOpenAIAnthropicLaunchSeptember 3, 2026September 1, 2026Main focusComputer use, reasoning, coding and autonomous workflowsCoding, knowledge work, research and long-running agentsComputer useDesigned to work across browsers, spreadsheets, websites and desktop appsCan operate browsers and work across multiple applicationsCodingMajor upgrade for software engineering and complex coding tasksOne of its core strengths, particularly for agentic codingAgentsBuilt around multi-step task execution and automationDesigned for hours-long, multi-application tasks with tool use and recovery