openai
Local model base_url not working
What version of Codex is running?
codex-cli 0.63.0
What subscription do you have?
ChatGPT Plus
Which model were you using?
qwen3-coder-30b
What platform is your computer?
Microsoft Windows NT 10.0.26100.0 x64
What issue are you seeing?
When using a local model with LM Studio, which I have hosted on a different PC in the same network, the base_url, which contains the IP adress of the other computer, is ignored. This is my config.toml:
model_provider="lmstudio"
model = "qwen3-coder-30b"
[model_providers.lmstudio]
name = "lmstudio"
base_url = "http://xxx.xxx.xx.xx:1234/v1"
[profiles.qwen3-coder-30b]
model_provider = "lmstudio"
model = "qwen/qwen3-coder-30b"
After the CLI fails to connect it shows this error: Connection failed: error sending request for url (http://localhost:1234/v1/responses), which means that it didn't use the IP from the base_url but the localhost URL.
What steps can reproduce the bug?
Host a local model in you local network on a different machine and do the config as above.
What is the expected behavior?
It is supposed to use the base_url, otherwise it is not able to connect, since the URL is false.
Additional information
No response
I'm also experiencing this issue. The last version that didn't have this issue is 0.58.0
I can confirm this is happening on macOS after updating to codex-cli v0.64.0.
I'm running qwen/qwen3-code-30b on LM Studio (localhost:1234) - macOS.
My config explicitly omits wire_api (which should default to "chat"), but the CLI is attempting to hit /v1/responses, which LM Studio doesn't support.
Downgrading to v0.63.0 fixed the connection immediately, so this seems to be a regression in how v0.64.0 handles the default API wire format for local providers.
I see that there is a pull request which hasn't been merged, actually it was closed. Any updates on this? Really waiting for this fix.
Yeah, we're stuck back on 0.58.0 until this is fixed.
On Thu, Dec 4, 2025 at 3:02 PM Elias Kassebaum @.***> wrote:
JimmyBenHur left a comment (openai/codex#7152) https://github.com/openai/codex/issues/7152#issuecomment-3614306894
I see that there is a pull request which hasn't been merged, actually it was closed. Any updates on this? Really waiting for this fix.
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Also experiencing this issue on codex >= 0.59.0 on MacOS + Ubuntu 24.04. Downgrading to 0.58.0 fixed the issue.
I tried this on codex 0.66.0 and still encountering this. MacOS inference engine, Ubuntu 24.04 server running codex
Which wire_api are you using? We recommend using wire_api = "responses". The latest versions of LM Studio support the responses API.
We've announced that we're deprecating support in codex for the older "chat/completions" wire_api. Refer to this discussion thread for details.
I tried your wire_api suggestion, but nothing changes. It's the local network (IP) URL which causes the problems, since the localhost URL is always used.