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OpenAI's Sept 3, 2026 flagship tops ARC-AGI-2 at 95% and ranks #2 on both LiveBench 2.0 Reasoning (92.7) and ARC-AGI-3 (62.7%), plus #4 on Arena WebDev (1767).
OpenAI's Sept 3, 2026 flagship tops ARC-AGI-2 at 95% and ranks #2 on both LiveBench 2.0 Reasoning (92.7) and ARC-AGI-3 (62.7%), plus #4 on Arena WebDev (1767). It trails #3 Claude Opus 5.5 by 2.2 points on Intelligence Index v5 and costs $10/$50 per 1M tokens, yet leads sibling #5 GPT-6.1 Sol by 2.3 points on Intelligence Index v5. Key 2026 benchmarks — Developer: OpenAI; Intelligence Index v5: 56.9 (#4); BenchAlign v5.8: 85.7 (#4); API Pricing (1M): $10 in / $50 out; Context Window: 1.05M tokens. OpenAI's Sept 3, 2026 flagship tops ARC-AGI-2 at 95% and ranks #2 on both LiveBench 2.0 Reasoning (92.7) and ARC-AGI-3 (62.7%), plus #4 on Arena WebDev (1767). Key benchmarks: Developer: OpenAI; Intelligence Index v5: 56.9 (#4); BenchAlign v5.8: 85.7 (#4); API Pricing (1M): $10 in / $50 out; Context Window: 1.05M tokens.
OpenAI's Sept 3, 2026 flagship tops ARC-AGI-2 at 95% and ranks #2 on both LiveBench 2.0 Reasoning (92.7) and ARC-AGI-3 (62.7%), plus #4 on Arena WebDev (1767). It trails #3 Claude Opus 5.5 by 2.2 points on Intelligence Index v5 and costs $10/$50 per 1M tokens, yet leads sibling #5 GPT-6.1 Sol by 2.3 points on Intelligence Index v5. Key 2026 benchmarks — Developer: OpenAI; Intelligence Index v5: 56.9 (#4); BenchAlign v5.8: 85.7 (#4); API Pricing (1M): $10 in / $50 out; Context Window: 1.05M tokens.
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