diff --git a/surfsense_backend/alembic/versions/2c3ace3296c0_add_inference_params_to_searchspaces_2.py b/surfsense_backend/alembic/versions/2c3ace3296c0_add_inference_params_to_searchspaces_2.py
new file mode 100644
index 000000000..6564fd098
--- /dev/null
+++ b/surfsense_backend/alembic/versions/2c3ace3296c0_add_inference_params_to_searchspaces_2.py
@@ -0,0 +1,32 @@
+"""add inference_params to searchspaces 2
+
+Revision ID: 2c3ace3296c0
+Revises: 9bc8b50514d0
+Create Date: 2025-10-05 12:56:00.739719
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '2c3ace3296c0'
+down_revision: Union[str, None] = '9bc8b50514d0'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
diff --git a/surfsense_backend/alembic/versions/4bad510c6eb4_add_inference_params_to_searchspaces.py b/surfsense_backend/alembic/versions/4bad510c6eb4_add_inference_params_to_searchspaces.py
new file mode 100644
index 000000000..fec40edcd
--- /dev/null
+++ b/surfsense_backend/alembic/versions/4bad510c6eb4_add_inference_params_to_searchspaces.py
@@ -0,0 +1,46 @@
+"""add inference_params to searchspaces
+
+Revision ID: 4bad510c6eb4
+Revises: 21
+Create Date: 2025-10-05 10:19:08.790345
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision: str = '4bad510c6eb4'
+down_revision: Union[str, None] = '21'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('chats', 'type',
+               existing_type=postgresql.ENUM('QNA', 'REPORT_GENERAL', 'REPORT_DEEP', 'REPORT_DEEPER', name='chattype'),
+               nullable=False)
+    op.drop_index(op.f('chucks_search_index'), table_name='chunks', postgresql_using='gin')
+    op.drop_index(op.f('chucks_vector_index'), table_name='chunks', postgresql_using='hnsw')
+    op.drop_index(op.f('document_search_index'), table_name='documents', postgresql_using='gin')
+    op.drop_index(op.f('document_vector_index'), table_name='documents', postgresql_using='hnsw')
+    op.add_column('searchspaces', sa.Column('inference_params', sa.JSON(), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('searchspaces', 'inference_params')
+    op.create_index(op.f('document_vector_index'), 'documents', ['embedding'], unique=False, postgresql_using='hnsw')
+    op.create_index(op.f('document_search_index'), 'documents', [sa.literal_column("to_tsvector('english'::regconfig, content)")], unique=False, postgresql_using='gin')
+    op.create_index(op.f('chucks_vector_index'), 'chunks', ['embedding'], unique=False, postgresql_using='hnsw')
+    op.create_index(op.f('chucks_search_index'), 'chunks', [sa.literal_column("to_tsvector('english'::regconfig, content)")], unique=False, postgresql_using='gin')
+    op.alter_column('chats', 'type',
+               existing_type=postgresql.ENUM('QNA', 'REPORT_GENERAL', 'REPORT_DEEP', 'REPORT_DEEPER', name='chattype'),
+               nullable=True)
+    # ### end Alembic commands ###
diff --git a/surfsense_backend/alembic/versions/9bc8b50514d0_add_inference_params_to_searchspaces_1.py b/surfsense_backend/alembic/versions/9bc8b50514d0_add_inference_params_to_searchspaces_1.py
new file mode 100644
index 000000000..8f7674510
--- /dev/null
+++ b/surfsense_backend/alembic/versions/9bc8b50514d0_add_inference_params_to_searchspaces_1.py
@@ -0,0 +1,32 @@
+"""add inference_params to searchspaces 1
+
+Revision ID: 9bc8b50514d0
+Revises: 4bad510c6eb4
+Create Date: 2025-10-05 12:31:02.448057
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '9bc8b50514d0'
+down_revision: Union[str, None] = '4bad510c6eb4'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
diff --git a/surfsense_backend/alembic/versions/b86972495f7d_add_inference_params_to_searchspaces_3.py b/surfsense_backend/alembic/versions/b86972495f7d_add_inference_params_to_searchspaces_3.py
new file mode 100644
index 000000000..99ff8ce0f
--- /dev/null
+++ b/surfsense_backend/alembic/versions/b86972495f7d_add_inference_params_to_searchspaces_3.py
@@ -0,0 +1,38 @@
+"""add inference_params to searchspaces 3
+
+Revision ID: b86972495f7d
+Revises: 2c3ace3296c0
+Create Date: 2025-10-05 15:05:06.391825
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'b86972495f7d'
+down_revision: Union[str, None] = '2c3ace3296c0'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f('chucks_search_index'), table_name='chunks', postgresql_using='gin')
+    op.drop_index(op.f('chucks_vector_index'), table_name='chunks', postgresql_using='hnsw')
+    op.drop_index(op.f('document_search_index'), table_name='documents', postgresql_using='gin')
+    op.drop_index(op.f('document_vector_index'), table_name='documents', postgresql_using='hnsw')
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_index(op.f('document_vector_index'), 'documents', ['embedding'], unique=False, postgresql_using='hnsw')
+    op.create_index(op.f('document_search_index'), 'documents', [sa.literal_column("to_tsvector('english'::regconfig, content)")], unique=False, postgresql_using='gin')
+    op.create_index(op.f('chucks_vector_index'), 'chunks', ['embedding'], unique=False, postgresql_using='hnsw')
+    op.create_index(op.f('chucks_search_index'), 'chunks', [sa.literal_column("to_tsvector('english'::regconfig, content)")], unique=False, postgresql_using='gin')
+    # ### end Alembic commands ###
diff --git a/surfsense_backend/alembic/versions/d17628273e13_add_inference_params_to_searchspaces_4.py b/surfsense_backend/alembic/versions/d17628273e13_add_inference_params_to_searchspaces_4.py
new file mode 100644
index 000000000..74d1b8fbf
--- /dev/null
+++ b/surfsense_backend/alembic/versions/d17628273e13_add_inference_params_to_searchspaces_4.py
@@ -0,0 +1,32 @@
+"""add inference_params to searchspaces 4
+
+Revision ID: d17628273e13
+Revises: b86972495f7d
+Create Date: 2025-10-05 15:30:12.651638
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'd17628273e13'
+down_revision: Union[str, None] = 'b86972495f7d'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
diff --git a/surfsense_backend/app/db.py b/surfsense_backend/app/db.py
index 1d33d4324..54af73239 100644
--- a/surfsense_backend/app/db.py
+++ b/surfsense_backend/app/db.py
@@ -204,6 +204,8 @@ class SearchSpace(BaseModel, TimestampMixin):
     name = Column(String(100), nullable=False, index=True)
     description = Column(String(500), nullable=True)
 
+    inference_params = Column(JSON, nullable=True)
+
     user_id = Column(
         UUID(as_uuid=True), ForeignKey("user.id", ondelete="CASCADE"), nullable=False
     )
diff --git a/surfsense_backend/app/schemas/search_space.py b/surfsense_backend/app/schemas/search_space.py
index 00bfdc0f6..3dd8da4e8 100644
--- a/surfsense_backend/app/schemas/search_space.py
+++ b/surfsense_backend/app/schemas/search_space.py
@@ -1,14 +1,21 @@
 import uuid
 from datetime import datetime
 
-from pydantic import BaseModel, ConfigDict
+from pydantic import BaseModel, ConfigDict, Field
 
 from .base import IDModel, TimestampModel
 
+class InferenceParams(BaseModel):
+    temperature: float | None = Field(None, ge=0.0, le=2.0)
+    max_tokens: int | None = Field(None, ge=0)
+    top_k: int | None = Field(None, ge=0)
+    top_p: float | None = Field(None, ge=0.0, le=1.0)
+
 
 class SearchSpaceBase(BaseModel):
     name: str
     description: str | None = None
+    inference_params: InferenceParams | None = None
 
 
 class SearchSpaceCreate(SearchSpaceBase):
@@ -16,7 +23,9 @@ class SearchSpaceCreate(SearchSpaceBase):
 
 
 class SearchSpaceUpdate(SearchSpaceBase):
-    pass
+    name: str | None = None
+    description: str | None = None
+    inference_params: InferenceParams | None = None
 
 
 class SearchSpaceRead(SearchSpaceBase, IDModel, TimestampModel):