OpenAI launched GPT-6 Astra on September 3, 2026, highlighting strong benchmark scores alongside mixed results in coding, independent indices, and pricing.
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🚀 GPT-6 Astra is here OpenAI launched GPT-6 Astra on September 3, 2026, calling it the world's most intelligent and aligned model. Here's what the numbers actually show: (OpenAI) 📊 Where Astra dominates • ARC-AGI-3: 99.9% (vs 30.2% for Claude Opus 5, 7.8% for GPT-5.6 Sol) — though this used a custom Responses API harness that changed two settings to better match real-world performance • FrontierMath Tier 4: 97.6% vs 87.8% for Fable 5.1 • GPQA Diamond: 96.0%, the highest published score (GPT-6 Astra Benchmarks Explained - Vellum +3) ⚖️ Where it's just... tied: • On the independent Artificial Analysis Intelligence Index, Astra scores 61.2, effectively tied with its predecessor GPT-5.6 Sol and behind Claude Fable 5.1 at 65.7 • On coding (DeepSWE), Astra landed around 73-74%, only a couple points above GPT-5.6 and actually below Gemini 3 Flash and Meta's Muse Spark 1.3 • It also loses Humanity's Last Exam to Fable 5.1 (GPT-6 Astra Benchmarks: What the Numbers Actually Show +2) 💰 Cost Pricing is $10 per million input tokens and $50 per million output, 2.5x the price of Sol — though OpenAI says it's more efficient per task. (Emergent) 🔗Sources Official announcement: https://openai.com/in
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