Codex cannot open specific links via web.run whereas Claude's fetch works

What version of Codex is running?

0.76.0

What subscription do you have?

Pro

Which model were you using?

gpt-5.2-codex xhigh

What platform is your computer?

Darwin 25.1.0 arm64 arm

What issue are you seeing?

During testing I found that Codex cannot open a specific URL, whereas Claude Code’s fetch tool can. I supplied both assistants with the same link: https://github.com/anthropics/skills/tree/main/skills. In Claude Code, using its fetch tool, the page content was retrieved successfully. However, when I asked Codex to open the same link, it consistently reported that it could not load the page and could not see its contents. As a result, it seems that Codex may rely only on web search results and does not fetch the page directly, potentially leading to fabricated content. When I asked Codex about its internal mechanism, it said it uses a tool called web.run to open links, but it still fails to fetch this page. I would like the Codex team to improve the tool used to fetch specific links so that Codex can open and read the content properly.

What steps can reproduce the bug?

1. Start a new conversation with Codex.
2. Provide the URL https://github.com/anthropics/skills/tree/main/skills to Codex and ask it to open or fetch the page contents.
3. Observe that Codex reports that it cannot load the link or access the content.
4. In a separate test, use Claude Code with its fetch tool on the same URL; note that the page content is retrieved successfully.
5. Compare the results to see that Codex’s web.run tool fails to fetch certain URLs.

What is the expected behavior?

Codex should be able to fetch and display the contents of valid links using its web.run tool, similar to how Claude Code’s fetch tool operates. When provided with a URL like https://github.com/anthropics/skills/tree/main/skills, it should open the page and return the actual content rather than relying solely on search results or reporting that it cannot access the link. If a link genuinely cannot be opened, Codex should report this accurately and not fabricate content.

Additional information

_No response_