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[GH-ISSUE #2963] Add ability to provide options in OpenAI compatibility endpoints #27580

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opened 2026-04-22 05:02:31 -05:00 by GiteaMirror · 5 comments
GiteaMirror commented 2026-04-22 05:02:31 -05:00
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Originally created by @pseudotensor on GitHub (Mar 6, 2024).
Original GitHub issue: https://github.com/ollama/ollama/issues/2963

It seems one can only set system prompt and hyperparameters like temperature as part of model config file. I'm using the OpenAI API, and ollama ignores system prompt or such hyperparaemters. AFAIK there's no good reason for this.

Am I missing something?

Originally created by @pseudotensor on GitHub (Mar 6, 2024). Original GitHub issue: https://github.com/ollama/ollama/issues/2963 It seems one can only set system prompt and hyperparameters like temperature as part of model config file. I'm using the OpenAI API, and ollama ignores system prompt or such hyperparaemters. AFAIK there's no good reason for this. Am I missing something?
GiteaMirror added the compatibilityfeature requestapi labels 2026-04-22 05:02:31 -05:00
GiteaMirror commented 2026-04-22 05:02:33 -05:00
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@j-schreuder commented on GitHub (Mar 16, 2024):

Somehow I thought this was already a thing and have been spending quite the hours trying different models, prompt finetuning etc. instead. Turns out things are just being clipped still defaulting to 2048 window with models supporting 16K+ as request options are left ignored. Hoping it'll be a quick feature to resolve since it's already on other endpoints.

<!-- gh-comment-id:2002070311 --> @j-schreuder commented on GitHub (Mar 16, 2024): Somehow I thought this was already a thing and have been spending quite the hours trying different models, prompt finetuning etc. instead. Turns out things are just being clipped still defaulting to 2048 window with models supporting 16K+ as request options are left ignored. Hoping it'll be a quick feature to resolve since it's already on other endpoints.
GiteaMirror commented 2026-04-22 05:02:34 -05:00
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@AndreasKarasenko commented on GitHub (Jul 19, 2024):

Don't mean to be pushy, but is there any news on this?

<!-- gh-comment-id:2239326735 --> @AndreasKarasenko commented on GitHub (Jul 19, 2024): Don't mean to be pushy, but is there any news on this?
GiteaMirror commented 2026-04-22 05:02:35 -05:00
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@tisfeng commented on GitHub (Mar 29, 2025):

Hello, we need this feature, is anyone going to push this forward?

<!-- gh-comment-id:2762998819 --> @tisfeng commented on GitHub (Mar 29, 2025): Hello, we need this feature, is anyone going to push this forward?
GiteaMirror commented 2026-04-22 05:02:38 -05:00
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@basnijholt commented on GitHub (Jun 30, 2025):

I've opened PR #11249 that implements options support for the OpenAI API endpoints. This adds support for think and keep_alive parameters and establishes a foundation for future parameter exposure. Would appreciate any feedback!

<!-- gh-comment-id:3021172220 --> @basnijholt commented on GitHub (Jun 30, 2025): I've opened [PR #11249](https://github.com/ollama/ollama/pull/11249/) that implements `options` support for the OpenAI API endpoints. This adds support for `think` and `keep_alive` parameters and establishes a foundation for future parameter exposure. Would appreciate any feedback!
GiteaMirror commented 2026-04-22 05:02:39 -05:00
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@flange-ipb commented on GitHub (Jul 21, 2025):

Edit: I'm sorry, this is wrong. The "params" keyword does not work for Ollama's OpenAI compatibility endpoints. On the other hand, this example is valid for Open WebUI's chat completions endpoint (OpenAI client's base_url is http://localhost:3000/api).

I just discovered that the magic keyword to be passed via OpenAI's extra_body is "params".

Example:

sync_client.chat.completions.create(
        model=MODEL,
        messages=[
            {
                "role": "user",
                "content": prompt,
            },
        ],
        extra_body={
            "params": {"num_ctx": CONTEXT_LENGTH, "seed": 123, "temperature": 0.1},
        },
    )
<!-- gh-comment-id:3096197312 --> @flange-ipb commented on GitHub (Jul 21, 2025): **Edit: I'm sorry, this is wrong.** The `"params"` keyword does not work for Ollama's OpenAI compatibility endpoints. On the other hand, this example is valid for Open WebUI's [chat completions endpoint](https://docs.openwebui.com/getting-started/api-endpoints#-chat-completions) (OpenAI client's `base_url` is `http://localhost:3000/api`). --- I just discovered that the magic keyword to be passed via OpenAI's `extra_body` is `"params"`. Example: ```python sync_client.chat.completions.create( model=MODEL, messages=[ { "role": "user", "content": prompt, }, ], extra_body={ "params": {"num_ctx": CONTEXT_LENGTH, "seed": 123, "temperature": 0.1}, }, ) ```
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