Leanstral 1.5: Proof abundance for all

Based on 5 sampled comments from this thread. Analyzed 2026-07-04.

• Praise: Leanstral 1.5 is making waves with its formal verification claims, showcasing the potential for proving the absence of bugs rather than just finding them.
• Praise: The integration with OpenATP is a game-changer, allowing users to leverage automated theorem provers in a flexible environment.
• Praise: The excitement about 'frontier small language models' indicates a growing interest in compact yet powerful AI solutions.
• Praise: Lean is gaining traction as a functional programming language, which could enhance its adoption in software verification compared to traditional tools.
• Concern: Critics are skeptical about the model's claimed improvements, pointing out that comparisons are made with outdated models, which feels like a cheap shot.
• Concern: Concerns about the effectiveness of testing and fuzzing are raised, suggesting that the marketing may oversell the model's capabilities.
• Concern: Commenters question the credibility of the authors, implying that missing basic edge cases reflects poorly on their expertise.
• Concern: There’s a sense that Lean's adoption in formal verification is still lagging behind more established systems, raising doubts about its viability.