github-starred/ollama
2
0
Fork 0
mirror of https://github.com/ollama/ollama.git synced 2026-07-17 05:36:16 -05:00
Code Issues 16.9k Packages Projects Releases 122 Wiki Activity

[GH-ISSUE #15576] gemma4:26b / 31b issues with structured output #35704

New Issue
Open
opened 2026-04-22 20:23:18 -05:00 by GiteaMirror · 1 comment
GiteaMirror commented 2026-04-22 20:23:18 -05:00
Owner
Copy Link

Originally created by @jbcallaghan on GitHub (Apr 14, 2026).
Original GitHub issue: https://github.com/ollama/ollama/issues/15576

What is the issue?

Issue:

gemma4:26b / 31b has issues with structured output where in the following example it says there is no context.

Summary:

A RAG solution has a tool calling node that calls tools to retrieve documents (context) that is then used by a final answer node to provide a structured output citing the used documents.

The tool calls are executed correctly, the tool response includes context_id: xxx content: This document blah

However the final node with structured output always returns a response where the model can't find any context. This is not the case when using other models such as nemo, gpt-oss, qwen, deepseek etc

Simplified Example:

class CitedAnswer(BaseModel):
"""
Structured answer to a user question.
"""
content: str = Field(
description=(
"The final answer to the user's question based ONLY on the supplied context. "
)
)
context_id: List[str] = Field(
description=(
" Cite ONLY the context_id values from the provided sources that were explicitly used in forming the answer"
)
)

final_model.format= CitedAnswer.model_json_schema()

Relevant log output

OS

No response

GPU

No response

CPU

No response

Ollama version

No response

Originally created by @jbcallaghan on GitHub (Apr 14, 2026). Original GitHub issue: https://github.com/ollama/ollama/issues/15576 ### What is the issue? Issue: gemma4:26b / 31b has issues with structured output where in the following example it says there is no context. Summary: A RAG solution has a tool calling node that calls tools to retrieve documents (context) that is then used by a final answer node to provide a structured output citing the used documents. The tool calls are executed correctly, the tool response includes context_id: xxx content: This document blah However the final node with structured output always returns a response where the model can't find any context. This is not the case when using other models such as nemo, gpt-oss, qwen, deepseek etc Simplified Example: class CitedAnswer(BaseModel): """ Structured answer to a user question. """ content: str = Field( description=( "The final answer to the user's question based ONLY on the supplied context. " ) ) context_id: List[str] = Field( description=( " Cite ONLY the `context_id` values from the provided sources that were *explicitly* used in forming the answer" ) ) final_model.format= CitedAnswer.model_json_schema() ### Relevant log output ```shell ``` ### OS _No response_ ### GPU _No response_ ### CPU _No response_ ### Ollama version _No response_
GiteaMirror added the bug label 2026-04-22 20:23:18 -05:00
GiteaMirror commented 2026-04-22 20:23:20 -05:00
Author
Owner
Copy Link

@PureBlissAK commented on GitHub (Apr 18, 2026):

🤖 Automated Triage & Analysis Report

Issue: #15576
Analyzed: 2026-04-18T18:19:29.868473

Analysis

  • Type: unknown
  • Severity: medium
  • Components: unknown

Implementation Plan

  • Effort: medium
  • Steps:

This issue has been triaged and marked for implementation.

<!-- gh-comment-id:4274304977 --> @PureBlissAK commented on GitHub (Apr 18, 2026): <!-- ollama-issue-orchestrator:v1 issue:15576 --> ## 🤖 Automated Triage & Analysis Report **Issue**: #15576 **Analyzed**: 2026-04-18T18:19:29.868473 ### Analysis - **Type**: unknown - **Severity**: medium - **Components**: unknown ### Implementation Plan - **Effort**: medium - **Steps**: *This issue has been triaged and marked for implementation.*
Sign in to join this conversation.
No Branch/Tag Specified
Branches Tags
Labels
Clear labels
amd
api
app
bug
build
cli
cloud
compatibility
context-length
create
docker
documentation
embeddings
feature request
feedback wanted
good first issue
gpt-oss
gpu
harmony
help wanted
image
install
intel
js
launch
linux
macos
memory
mlx
model
needs more info
networking
nvidia
ollama.com
performance
pull-request
Mirrored from GitHub Pull Request
 python
question
registry
rendering
thinking
tools
top
vulkan
windows
wsl
No Label bug
Milestone
No items
No Milestone
Projects
Clear projects
No project
Assignees
Clear assignees
GiteaMirror ninjasurge
No Assignees
1 Participants
Notifications
Due Date
No due date set.
Dependencies

No dependencies set.

Reference: github-starred/ollama#35704
Delete Branch "%!s()"

Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?