# When will the new GPT-5.6 Responses API parameters be supported in AIP?

**URL:** <https://community.palantir.com/t/when-will-the-new-gpt-5-6-responses-api-parameters-be-supported-in-aip/6947>\
**Category:** Ask the Community\
**Tags:** language-model-service\
**Created:** [July 15, 2026, 8:02am UTC](https://community.palantir.com/t/when-will-the-new-gpt-5-6-responses-api-parameters-be-supported-in-aip/6947 "2026-07-15T08:02:43Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![PellaML](https://yyz1.discourse-cdn.com/palantir/user_avatar/community.palantir.com/pellaml/32/7917_2.png) [@PellaML](https://community.palantir.com/u/PellaML)\
**Post date:** [July 15, 2026, 8:02am UTC](https://community.palantir.com/t/when-will-the-new-gpt-5-6-responses-api-parameters-be-supported-in-aip/6947/1 "2026-07-15T08:02:44Z")

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Hi Palantir team!

Thanks for making the GPT-5.6 series available in AIP.

We’ve started testing the models through AIP’s OpenAI-compatible Responses endpoint:

`POST /api/v2/llm/proxy/openai/v1/responses`

However, some of the newer GPT-5.6 parameters do not appear to be supported yet. For example, setting `reasoning.effort` to `"max"` results in a “Failed to deserialize request body” error.

Is support planned for the following parameters?

- `reasoning.effort: "max"`
- `reasoning.mode`
- `service_tier`
- Other new GPT-5.6 Responses API capabilities

For `service_tier` specifically, will options such as `default` and `priority` be exposed through the AIP endpoint, or will service-tier selection be managed internally by AIP?

Are these parameters temporarily unavailable because the proxy schema has not yet been updated for GPT-5.6 and the latest Responses API parameters, or are any of them intentionally unsupported?

Thanks!