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[GH-ISSUE #15579] Loading gemma4:26b-nvfp4 raises "Error: 500: mlx runner failed: Error: unsupported architecture: Gemma4ForConditionalGeneration" #35707

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opened 2026-04-22 20:23:23 -05:00 by GiteaMirror · 4 comments
GiteaMirror commented 2026-04-22 20:23:23 -05:00
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Originally created by @johnkea on GitHub (Apr 14, 2026).
Original GitHub issue: https://github.com/ollama/ollama/issues/15579

What is the issue?

Running gemma4:26b-nvfp4 on my MacBook M3 raises

Error: 500 Internal Server Error: mlx runner failed: Error: unsupported architecture: Gemma4ForConditionalGeneration (exit: exit status 1)

although running the model qwen3.5:9b-nvfp4 has no issue.

Relevant log output

OS

macOS

GPU

Apple

CPU

Apple

Ollama version

0.20.7

Originally created by @johnkea on GitHub (Apr 14, 2026). Original GitHub issue: https://github.com/ollama/ollama/issues/15579 ### What is the issue? Running gemma4:26b-nvfp4 on my MacBook M3 raises Error: 500 Internal Server Error: mlx runner failed: Error: unsupported architecture: Gemma4ForConditionalGeneration (exit: exit status 1) although running the model qwen3.5:9b-nvfp4 has no issue. ### Relevant log output ```shell ``` ### OS macOS ### GPU Apple ### CPU Apple ### Ollama version 0.20.7
GiteaMirror added the bug label 2026-04-22 20:23:23 -05:00
GiteaMirror commented 2026-04-22 20:23:25 -05:00
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@kay1ess commented on GitHub (Apr 14, 2026):

me too

<!-- gh-comment-id:4244734015 --> @kay1ess commented on GitHub (Apr 14, 2026): me too
GiteaMirror commented 2026-04-22 20:23:26 -05:00
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@rick-github commented on GitHub (Apr 14, 2026):

Gemma4 MLX support in 0.20.8.

<!-- gh-comment-id:4245074779 --> @rick-github commented on GitHub (Apr 14, 2026): Gemma4 MLX support in 0.20.8.
GiteaMirror commented 2026-04-22 20:23:26 -05:00
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@iamadalek commented on GitHub (Apr 16, 2026):

Same for main  ollama run gemma4:31b-mlx-bf16
pulling manifest
pulling model: 100% ▕██████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████▏ 62 GB
writing manifest
success
Error: 500 Internal Server Error: mlx runner failed: Error: unsupported architecture: Gemma4ForConditionalGeneration (exit: exit status 1)

<!-- gh-comment-id:4257532287 --> @iamadalek commented on GitHub (Apr 16, 2026): Same for main  ollama run gemma4:31b-mlx-bf16 pulling manifest pulling model: 100% ▕██████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████▏ 62 GB writing manifest success Error: 500 Internal Server Error: mlx runner failed: Error: unsupported architecture: Gemma4ForConditionalGeneration (exit: exit status 1)
GiteaMirror commented 2026-04-22 20:23:27 -05:00
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@PureBlissAK commented on GitHub (Apr 18, 2026):

🤖 Automated Triage & Analysis Report

Issue: #15579
Analyzed: 2026-04-18T18:19:28.807727

Analysis

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

Implementation Plan

  • Effort: medium
  • Steps:

This issue has been triaged and marked for implementation.

<!-- gh-comment-id:4274304944 --> @PureBlissAK commented on GitHub (Apr 18, 2026): <!-- ollama-issue-orchestrator:v1 issue:15579 --> ## 🤖 Automated Triage & Analysis Report **Issue**: #15579 **Analyzed**: 2026-04-18T18:19:28.807727 ### Analysis - **Type**: unknown - **Severity**: medium - **Components**: unknown ### Implementation Plan - **Effort**: medium - **Steps**: *This issue has been triaged and marked for implementation.*
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