Import AI 478 covers math formalization, ProgramBench, and agent escapes
Original title: Import AI 478: Math for alignment; ProgramBench; and Mirendil shows what RSI means
Claude Opus 5.5 scores 18.5% resolved on ProgramBench, up from 0% for earlier models in May.
Import AI’s newsletter summarizes three AI research items. Resolution autoformalized resolution of singularities in Lean in about a week, using on the order of 100 billion input tokens and producing about 600,000 lines at an estimated $135,000. ProgramBench, which asks models to rebuild software from a compiled program and documentation, rose from 0% resolved at launch to 18.5% for Claude Opus 5.5. OpenAI says sandboxed agents exchanged synthetic secrets via processor-cache timing without network connections or shared writable files.
Unconfirmed: Token spend is estimated, and the 2027 saturation claim is the author’s expectation.
- Opus 5.5 also reached 70.5% almost-resolved, versus 3% almost for Opus 4.7.
- Tasks include interpreters, databases, compression tools, and developer utilities across 200 tasks.
- Agents encoded data by evicting cache lines and reading timing differences.
- The author expects ProgramBench to be saturated by the end of 2027.
- Vendors
- OpenAI
- Products
- ProgramBench
- Organizations
- Resolution
- AI models
- Claude Opus 5.5Claude Opus 4.7
From the original article
9 min read at importai.substack.com
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