# No answer content returned for models

**URL:** <https://discuss.ai.google.dev/t/no-answer-content-returned-for-models/144642>\
**Category:** Gemini API\
**Tags:** models, bug, gemini\
**Created:** [May 13, 2026, 7:22am UTC](https://discuss.ai.google.dev/t/no-answer-content-returned-for-models/144642 "2026-05-13T07:22:19Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Vladislav\_Berezin](https://d1dlmcr85iqnpo.cloudfront.net/user_avatar/discuss.ai.google.dev/vladislav_berezin/32/44103_2.png) [@Vladislav\_Berezin](https://discuss.ai.google.dev/u/Vladislav_Berezin)\
**Post date:** [May 13, 2026, 7:22am UTC](https://discuss.ai.google.dev/t/no-answer-content-returned-for-models/144642/1 "2026-05-13T07:22:19Z")

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**Dear Support Team,**

I am encountering a consistent issue when using the following two models via the API:

- `deep-research-max-preview-04-2026`

- `deep-research-preview-04-2026`

**Expected behavior:**  
The API should return a valid, non-empty `answer` field containing the research output.

**Actual behavior:**  
The response returns a `"status": "completed"` but the `"answer"` field only contains a source placeholder, not the actual researched content.  
No data appears in `references`, `progress` remains `null`, and `error` is also `null`.  
The response format is as follows:  
`[GEMINI RESPONSE] {`  
`“status”: “completed”,`  
`“answer”: “\n\n` **`Sources:`** `\n1. dacrbf7qdtba (fileSearchStores/course4986960bea-5wmx0rj1ejuk)\n”,`  
`“references”: ``,`  
`“progress”: null,`  
`“error”: null`  
`}`

**Impact:**  
The feature is effectively non-functional for these two specific preview models, as no useful answer text is returned.Additional context:  
Other deep-research models (e.g., earlier versions) work as expected. The issue is reproducible 100% of the time with the above model names.

Could you please:

1. Confirm whether these model names are currently active and correctly implemented.

2. Investigate why the `answer` field is not populated with the research result.

3. Advise if any additional parameters or changes in request format are required for these specific preview models.

Thank you for your assistance.

---

<div class="post-metadata">

**Author:** ![X\_F](https://d1dlmcr85iqnpo.cloudfront.net/user_avatar/discuss.ai.google.dev/x_f/32/121392_2.png) [@X\_F](https://discuss.ai.google.dev/u/X_F)\
**Post date:** [May 13, 2026, 8:31am UTC](https://discuss.ai.google.dev/t/no-answer-content-returned-for-models/144642/2 "2026-05-13T08:31:00Z")

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I’m getting similar issues in gemini-2.5-flash, from today gemini doesn’t output any outputs or tool calls in over 60% of the occasion