{"slug": "used-claude-sonnet-5-5-for-code-gen", "title": "Used Claude Sonnet 5.5 for Code Gen", "summary": "A developer reported that Claude Sonnet 5.5 generated two Rust functions for about $0.06 after DeepSeek V4.1 Flash produced hard-to-read code and a slight performance regression. The developer said Sonnet fixed the regression and yielded more readable code, calling it clearly superior to DeepSeek V4.1 Flash at only 2-3 times the cost.", "body_md": "I found two more functions in my Rust program that could be replaced with **specifications** and **generated** with **AI**. I decided to test some AI chat bots to see if I could improvement my implementations.\n\nFirst I tried **DeepSeek** V4.1 Flash, but it gave me an implementation that was hard to read, almost like **spaghetti code**. It also seemed to cause a tiny performance regression. I decided to try a different model.\n\nI tried the specification prompts in **Claude Sonnet 5.5**. This fixed the performance regression, and yielded better, more readable code. So I ended up spending about $0.06 on Sonnet today to generate 2 Rust functions.\n\nIn this case, **Sonnet** was **clearly superior** to DeepSeek V4.1 Flash, and only 2-3 times more expensive. It seems that mass **copyright infringement** has really helped Anthropic improve their models.", "url": "https://wpnews.pro/news/used-claude-sonnet-5-5-for-code-gen", "canonical_source": "https://www.dotnetperls.com/2026_10_2_used-claude-sonnet-55-code-gen", "published_at": "2026-10-02 07:00:00+00:00", "updated_at": "2026-10-02 16:37:08.834337+00:00", "lang": "en", "topics": ["ai-tools", "large-language-models", "generative-ai", "developer-tools"], "entities": ["Claude Sonnet 5.5", "DeepSeek V4.1 Flash", "Anthropic", "DeepSeek", "Rust"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/used-claude-sonnet-5-5-for-code-gen", "markdown": "https://wpnews.pro/news/used-claude-sonnet-5-5-for-code-gen.md", "text": "https://wpnews.pro/news/used-claude-sonnet-5-5-for-code-gen.txt", "jsonld": "https://wpnews.pro/news/used-claude-sonnet-5-5-for-code-gen.jsonld"}}