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OpenAI
GPT-5.6 family
4 releases · Elo progression and succession lineage (D9)
Elo progression
Jul 2026
GPT-5.6 Luna
CLOSED
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2534.3
Jul 2026
GPT-5.6 Sol
CLOSED
—
2829.1
Jul 2026
GPT-5.6 Terra
CLOSED
—
2638.6
Aug 2026
GPT-5.6 Cyber
CLOSED
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succeeds GPT-5.6 Luna
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