At least as of January 2026, both Opus 4.5 and GPT-5 solves this prompt on the first try:
Find a sequence of words that is: − 20 words long—contains exactly 2 repetitions of the same word twice in a row—contains exactly 2 repetitions of the same word thrice in a row
At least as of January 2026, both Opus 4.5 and GPT-5 solves this prompt on the first try:
When did you evaluate this?
End of 2024