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 GPUs
Astra 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 Automation
Unlike 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 Workloads
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OpenAI 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 Cost
Fast 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 type | Price per 1 million tokens | Approx. price in India* |
| Input tokens | $10 | ₹940 |
| Cached input | $1 | ₹94 |
| Cache writes | $12.50 | ₹1,150 |
| Output tokens | $50 | ₹4,700 |
ChatGPT 6 Astra New Features
OpenAI’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:
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1. Better Coding and Software Engineering
The 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 Automation
Astra 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 Presentations
The 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.
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4. Improved Browsing
Astra is built to handle more demanding browser-based tasks, combining web navigation with reasoning and multi-step execution.
ChatGPT 6 Astra vs Claude Fable 5.1
| Feature | GPT-6 Astra | Claude Fable 5.1 |
| Company | OpenAI | Anthropic |
| Launch | September 3, 2026 | September 1, 2026 |
| Main focus | Computer use, reasoning, coding and autonomous workflows | Coding, knowledge work, research and long-running agents |
| Computer use | Designed to work across browsers, spreadsheets, websites and desktop apps | Can operate browsers and work across multiple applications |
| Coding | Major upgrade for software engineering and complex coding tasks | One of its core strengths, particularly for agentic coding |
| Agents | Built around multi-step task execution and automation | Designed for hours-long, multi-application tasks with tool use and recovery |
