Stay organized with collectionsSave and categorize content based on your preferences.
Agentspace offers multiple model versions for you to choose when
generating answers. You can choose the model versions when usingsearch
summariesandanswers and
follow-ups.
Available models
Agentspace uses two types of models for question and answering
use cases:
Vertex AI LLM models that have been tested on question and
answering tasks
Agentspace models that are based on Vertex AI LLM
models and further trained to address question and answering tasks
Agentspace models share the same discontinuation date as their
base Vertex AI LLM models. The base LLM model is available for six
months after the release date of the next version of the model, per theVertex
AI model lifecycle
policy.
Leave enough time to migrate to new models before the discontinuation dates.
The following table lists model version specifications. When you set a model
specification, the API uses the specified model to generate answers.
Model version
Description
Context window
Discontinuation date
stable
The default model choice if the model version is not set.
The model designated asstablechanges periodically as new
models and versions become available.
128K
N/A
gemini-2.5-flash/answer_gen/v1
An Agentspace model based on thegemini-2.5-flashmodel with additional tuning to address question and answering tasks.
The model is frozen after release.
128K
June 17, 2026
gemini-2.0-flash-001/answer_gen/v1
An Agentspace model based on thegemini-2.0-flash-001model with additional tuning to address question and answering tasks.
The model is frozen after release.
128K
Feb 5, 2026
gemini-1.5-flash-002/answer_gen/v1
An Agentspace model based on thegemini-1.5-flash-002model with additional tuning to address question and answering tasks.
The model is frozen after release.
128K
Sept 24, 2025
gemini-1.5-flash-001/answer_gen/v2
An Agentspace model based on thegemini-1.5-flash-001model with additional tuning (version 2) on blended structured and unstructured data to address question and answering tasks.
The model is frozen after release.
128K
May 24, 2025
gemini-1.5-flash-001/answer_gen/v1
An Agentspace model based on thegemini-1.5-flash-001model with additional tuning to address question and answering tasks.
The model is frozen after release.
128K
May 24, 2025
preview
The preview model specification points to the latestgemini-1.5-pro-002model. The preview model is subject to change without notification. If
you usepreviewas the model, you might see changes in the responses when the
model changes. If you want consistency in the responses, select a
specific model.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-05 UTC."],[],[],null,["Agentspace offers multiple model versions for you to choose when\ngenerating answers. You can choose the model versions when using [search\nsummaries](/agentspace/docs/get-search-summaries) and [answers and\nfollow-ups](/agentspace/docs/answer).\n\nAvailable models\n\nAgentspace uses two types of models for question and answering\nuse cases:\n\n- Vertex AI LLM models that have been tested on question and answering tasks\n- Agentspace models that are based on Vertex AI LLM models and further trained to address question and answering tasks\n\nAgentspace models share the same discontinuation date as their\nbase Vertex AI LLM models. The base LLM model is available for six\nmonths after the release date of the next version of the model, per the [Vertex\nAI model lifecycle\npolicy](/vertex-ai/generative-ai/docs/learn/model-versioning).\nLeave enough time to migrate to new models before the discontinuation dates.\n\nThe following table lists model version specifications. When you set a model\nspecification, the API uses the specified model to generate answers.\n\n| Model version | Description | Context window | Discontinuation date |\n|--------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------|----------------------|\n| `stable` | The default model choice if the model version is not set. The `stable` model specification points to `gemini-2.5-flash/answer_gen/v1`. The model designated as `stable` changes periodically as new models and versions become available. | 128K | N/A |\n| `gemini-2.5-flash/answer_gen/v1` | An Agentspace model based on the [`gemini-2.5-flash`](/vertex-ai/generative-ai/docs/models/gemini/2-5-flash) model with additional tuning to address question and answering tasks. The model is frozen after release. | 128K | June 17, 2026 |\n| `gemini-2.0-flash-001/answer_gen/v1` | An Agentspace model based on the [`gemini-2.0-flash-001`](/vertex-ai/generative-ai/docs/gemini-v2#2.0-flash) model with additional tuning to address question and answering tasks. The model is frozen after release. | 128K | Feb 5, 2026 |\n| `gemini-1.5-flash-002/answer_gen/v1` | An Agentspace model based on the [`gemini-1.5-flash-002`](/vertex-ai/generative-ai/docs/learn/model-versioning#stable-versions-available) model with additional tuning to address question and answering tasks. The model is frozen after release. | 128K | Sept 24, 2025 |\n| `gemini-1.5-flash-001/answer_gen/v2` | An Agentspace model based on the [`gemini-1.5-flash-001`](/vertex-ai/generative-ai/docs/learn/model-versioning#stable-versions-available) model with additional tuning (version 2) on blended structured and unstructured data to address question and answering tasks. The model is frozen after release. | 128K | May 24, 2025 |\n| `gemini-1.5-flash-001/answer_gen/v1` | An Agentspace model based on the [`gemini-1.5-flash-001`](/vertex-ai/generative-ai/docs/learn/model-versioning#stable-versions-available) model with additional tuning to address question and answering tasks. The model is frozen after release. | 128K | May 24, 2025 |\n| `preview` | The preview model specification points to the latest [gemini-1.5-pro-002](/vertex-ai/generative-ai/docs/learn/model-versioning#stable-versions-available) model. The preview model is subject to change without notification. If you use `preview` as the model, you might see changes in the responses when the model changes. If you want consistency in the responses, select a specific model. | 128K | N/A |\n\nWhat's next\n\n- [Get search summaries](/agentspace/docs/get-search-summaries)"]]
