OpenAI's GPT-6 Astra Excels in Many Areas but Falls Short in Writing

Overview

• On September 3, OpenAI introduced GPT-6 Astra, priced at $10 per million input tokens and $50 per million output tokens, a significant increase over its predecessor.
• Early users showcased remarkable projects, such as a detailed Unreal Engine model of Manhattan and a 3D representation of Hangzhou created in just 24 minutes.
• Despite its strengths, Astra's writing capabilities received lower ratings than the previous model, reflecting an approximate 80 Elo point decline in performance on economically relevant benchmarks.

OpenAI's launch of GPT-6 Astra has sparked immediate public testing, revealing a mixed bag of its capabilities. While it stands out in tasks requiring spatial awareness and mechanical operations, feedback indicates it falls short in writing performance compared to earlier versions.

The pricing for Astra is set at $10 for every million input tokens and $50 for output tokens, marking a 2.5 times increase from GPT-5.6 Sol. During the launch, OpenAI president Greg Brockman highlighted advancements toward artificial general intelligence (AGI).

A notable feature of Astra is its ability to operate a computer directly, completing tasks autonomously rather than merely providing instructions. In a test named OSWorld 2.0, Astra achieved a success rate of 72.6% on desktop tasks, outperforming Sol's 65.7% success rate over a longer time frame.

Real-world applications demonstrate where GPT-6 excels and where it struggles. Below are key highlights of its capabilities:

Visual Capabilities: Recreating Manhattan

Astra has shown exceptional visual and spatial skills. Tester Matt Shumer successfully created a replica of Manhattan in Unreal Engine over a week, showcasing the model's precision in detailing streets.

GPT-6 Astra built this Manhattan world in Unreal Engine over the course of a week. It was literally able to go street by street to make each one perfect. pic.twitter.com/7VTol9QfHq

— Matt Shumer (@mattshumer_) September 3, 2026

Another tester, Max Weinbach, praised Astra's performance in reconstructing Apple Park in Blender, calling it "absurdly good." In various tests, users were able to generate detailed 3D models and interactive environments quickly and efficiently.

Game Development: Engaging Playable Experiences

Game development has emerged as one of Astra's standout applications. Anshu Chimala created a 3D game in just 45 minutes, branding Astra as "some kind of turbo-AGI machine god for 3D games." Rishi Prasad also developed a multiplayer browser shooter in a single day, noting significant improvements in visual quality.

Some developers even bypassed design phases entirely, converting mobile game advertisements into playable versions using Astra in under 30 minutes, showcasing its grasp of game logic and visuals.

Computer Use and Illustration: Human-like Creativity

A Japanese illustrator, Taiyaki Sun, tasked Astra with coloring a hand-drawn line art in a human-like manner, demonstrating its ability to control digital art software effectively.

GPT-6 Astra's drawing ability is incredible! I asked it to color my hand-drawn line art as a human would. pic.twitter.com/hZk30pBgCq

— taiyakisun(たい焼き太陽)🥐 (@taiyaki_sun) September 5, 2026

Users have shared videos of Astra recreating their photos in paint, underscoring its visual control capabilities.

Musical Composition: The Bach Benchmark

Astra has also excelled in music composition, achieving the highest score on the Bach Benchmark for writing four-part chorales without errors. It completed complex tasks like creating a virtual piano with Bach's Brandenburg Concertos in under 11 minutes, showcasing its musical capabilities.

GPT-6 Astra has the best result yet on the Bach Benchmark. https://t.co/upUts1Y3Ps

— Auggie (@aug5thmusic) September 5, 2026

Writing: Areas of Weakness

Despite its strengths, many users expressed disappointment in Astra's writing capabilities, noting a decline in performance compared to GPT-4o. It ranked lower in an internal benchmark, achieving a score of 1995 Elo, significantly below its predecessor's 2156. Feedback from users indicated that writing requires extensive prompting, often lacking creativity and personality.

GPT-6 Astra... is surprisingly disappointing. pic.twitter.com/gUxHtpIdfo

— Louis-François Bouchard 🎥🤖 (@Whats_AI) September 5, 2026

Independent assessments corroborated these sentiments, noting a decline in performance on various benchmarks, particularly in writing and creative tasks.

Access and Pricing

Astra will be accessible to ChatGPT Plus, Pro, Business, and Enterprise users, along with API access through Microsoft Azure and AWS Bedrock. The model's advanced cybersecurity features are currently limited to OpenAI's Daybreak program. Despite its high cost, Astra's performance marks a significant step forward in AI capabilities, though it faces challenges in subjective writing tasks.