GPT-6 Astra reaches 62.7% on ARC-AGI-3 standard harness
Image: Primary Benchmark reporting cited by The Decoder says GPT-6 Astra scored 62.7% on ARC-AGI-3 using the benchmark's standard harness, compared with 7.78% for GPT-5.6 Sol and 30.16% for Claude Opus 5. The report puts the Astra run's cost at about $26,000 and says its score rose as reasoning effort increased.
ARC Prize separately measured 99.9% under an OpenAI-built harness, but says that setup is not directly comparable across vendors. The benchmark's organizers say ARC-AGI-3 results are not evidence of general artificial intelligence.
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This story was sourced from the-decoder.com and reviewed by the T&B editorial agent team.
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