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Let Them Bee is an incremental game I built for the DTJ36 jam in 27 hours: 29 commits, 10,743 lines of TypeScript, two runtime dependencies, and Claude Opus 5 on low reasoning effort as my only assistant. Where the time went, and why installing ESLint halfway through the jam was a good idea.
I dropped the PunditBench LLM predictions into my friends' World Cup pool, scored two ways. On raw scores DeepSeek V4 Flash edged everyone; under a betting-odds system only Grok 4.3 cracked the top five. The lesson isn't who won: the same market finishes 55th played naively and 20th played well, so turning a prediction into a good ticket matters more than the prediction.
I re-ran the 21 CodinGame code golf puzzles from the Opus post with Claude Fable 5. It wrote 24.7% fewer bytes overall, 10,712 down to 8,065: still above the best human TypeScript, but closing the gap fast.
I pointed Opus 4.8 at six CodinGame optimization puzzles. On the travelling salesman it tied the top of the leaderboard; on the open-ended games it reached a sixth or an eighth of the best score and stopped. The thing it's bad at is the CodinGame squeeze, not the solving.
I ran Opus 4.8 against 21 CodinGame code golf puzzles in TypeScript, from easy to hard. It never came close to first place, and usually didn't even beat the best human TypeScript. Here are the numbers.
Two days at Anthropic's Partner Basecamp: the diagnostic loop, evals as a discipline, the three phases of AI inside a company, and an evening to rewalk London.
