Psyho(@FakePsyho):According to wata (problem coordinator for heuristic contests on AtCoder), Astra would place 1st in 40 out of 43 short (4h) contests he tried 😮 In another post he mentions that Opus 5 had a clear drop in recent contests (which suggests that Opus was trained explicitly on those problems), while the situation with Astra is unclear. (no idea if web search was enabled during tests, if yes then models could access repos on GitHub and then this result is harder to interpret)

Psyho

@FakePsyho

Humanity's Last Programmer; Game Designer; Problem Solver; past: OpenAI (Dota), Pro Competitive Programmer, Poker

参加 May 2012

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Psyho@FakePsyho

2026.09.07 16:24

According to wata (problem coordinator for heuristic contests on AtCoder), Astra would place 1st in 40 out of 43 short (4h) contests he tried 😮 In another post he mentions that Opus 5 had a clear drop in recent contests (which suggests that Opus was trained explicitly on those problems), while the situation with Astra is unclear. (no idea if web search was enabled during tests, if yes then models could access repos on GitHub and then this result is harder to interpret)