--- title: "I gave the same bug to Claude Code, Codex, Antigravity, and their open-source rival — only one handled it like a pro" url: https://daily.dev/posts/i-gave-the-same-bug-to-claude-code-codex-antigravity-and-their-open-source-rival-only-one-handl-cyj9l9brx source_url: https://www.xda-developers.com/gave-same-bug-to-claude-code-codex-antigravity-eigent-only-one-handled-it-like-pro type: article source: "XDA Developers" published: 2026-08-25T21:34:34.143Z updated: 2026-08-25T21:58:17.283Z tags: ["ai-coding", "claude-code", "openai-codex"] reading_time: 8 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # I gave the same bug to Claude Code, Codex, Antigravity, and their open-source rival — only one handled it like a pro **[XDA Developers](https://daily.dev/sources/xda-developers)** · 8 min read · 0 upvotes · 0 comments ## Summary A designer with limited coding experience tested Claude Code, Codex, Antigravity, and the open-source multi-agent tool Eigent against the same deliberately broken HTML file containing two hidden bugs. Claude Code (running Opus 4.7) gave a tight diagnosis and fixed both bugs on the first try. Codex (GPT 5.6 Sol) produced the deepest analysis, catching accessibility issues and pricing logic problems beyond what was asked, then fixed everything unprompted. Antigravity (Gemini 3.1/3.5 Pro) struggled initially with failed edits and a crashed run before succeeding on a third attempt. Eigent, running Qwen 3.5 9B locally via LM Studio with a multi-agent workforce, produced the most thorough diagnostic report but took over 15 minutes across three attempts to actually fix the file. All four eventually fixed the bugs, but Codex was rated the best overall for depth and initiative. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Which AI coding assistant is best at debugging code without extra guidance, Claude Code, Codex, Antigravity, or Eigent? Codex, running on GPT 5.6 Sol with high reasoning, produced the deepest read among the four tools tested. It caught the same root-cause bugs as Claude Code but also flagged an unused billing variable, a misleading pricing label, and a missing accessibility attribute for screen readers, then fixed all of it unprompted when asked for a fix. _Comparing AI coding assistants on real bugs helps developers pick the right tool on daily.dev._ ### What went wrong when using Antigravity with Gemini to fix code bugs? Antigravity initially failed to edit a file directly, instead pasting code snippets into chat while admitting the full file kept getting cut off, and a second attempt using Claude Sonnet 4.6 Thinking crashed within one second with an execution error. A third attempt after switching Gemini's reasoning from low to high and explicitly instructing it to edit the file in place finally succeeded. _Developers weighing agentic coding tools track reliability issues like these on daily.dev._ ### How does Eigent, the open-source local AI coding agent, compare to Claude Code and Codex for debugging? Eigent, running Qwen 3.5 9B locally via LM Studio with a multi-agent workforce, produced the most thorough diagnostic report of any tool tested, including a markdown file with status labels, line numbers, and expected-vs-actual behavior for each feature. However, fixing the bug took over 15 minutes across three attempts on 8GB VRAM, far slower than the other tools. _Anyone choosing between local and cloud coding agents can compare tradeoffs like these on daily.dev._ ## Similar posts on daily.dev - [I created a complex website using Claude Code, Codex, and Google Antigravity, and only one of them behaved like a senior developer](https://daily.dev/posts/i-created-a-complex-website-using-claude-code-codex-and-google-antigravity-and-only-one-of-them-b-sqqrpk4ll) · XDA Developers · 0 upvotes · 0 comments - [I asked Claude Code, Codex, and Google Antigravity to build the same complex website – only one felt like a seasoned developer](https://daily.dev/posts/i-asked-claude-code-codex-and-google-antigravity-to-build-the-same-complex-website-only-one-felt-okv4eub9l) · XDA Developers · 0 upvotes · 0 comments - [I tried replacing Claude Code with Antigravity, Codex, and Cursor 3.0 – only one was worth paying for](https://daily.dev/posts/i-tried-replacing-claude-code-with-antigravity-codex-and-cursor-3-0-only-one-was-worth-paying-fo-sc6t8qkpr) · XDA Developers · 0 upvotes · 0 comments --- Tags: [#ai-coding](https://daily.dev/tags/ai-coding), [#claude-code](https://daily.dev/tags/claude-code), [#openai-codex](https://daily.dev/tags/openai-codex) [View this post on daily.dev](https://daily.dev/posts/i-gave-the-same-bug-to-claude-code-codex-antigravity-and-their-open-source-rival-only-one-handl-cyj9l9brx)