Nemotron 3 Super 120B-A12B doesn't work through openrouter

[SpodeZealot]

Description

Problem

When using Nemotron 3 Super 120B-A12B through OpenRouter in OpenCode v1.2.27, the model frequently generates broken or unusable code and often gets stuck in infinite loops.

Context

This affects OpenCode v1.2.27 when configured to use OpenRouter with the paid Nemotron 3 Super 120B-A12B model. In addition to producing invalid code, the model sometimes wraps output in malformed placeholder-style formatting such as [{code here}], which can overwrite files with unusable content. It also appears to loop repeatedly instead of completing the task.

Reproduction steps

• Use OpenCode v1.2.27
• Configure OpenRouter as the provider
• Select the paid Nemotron 3 Super 120B-A12B model
• Ask it to create a JavaScript project with multiple files, or ask it to modify an existing file
• Observe the generated output and agent behavior

Expected result

The agent generates valid, runnable code, applies file changes correctly, and completes the task without looping.

Actual result

The agent often generates broken code, may insert malformed wrapper formatting that makes files unusable, and frequently gets stuck in infinite loops.

App Version

v1.2.27

API Provider

OpenRouter

Model Used

Nemotron 3 Super 120B-A12B

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• Loop in certain models #3743: Loop in certain models — covers similar looping/stuck behavior when models repeatedly attempt the same operations
• Nemotron seems to ignore my request when using ollama #6327: Nemotron seems to ignore my request when using ollama — also reports Nemotron model producing incorrect or non-functional behavior (different provider, same model family)

If your issue is distinct from these, please add a comment explaining the differences so it can stay open.

[SpodeZealot]

This is different, it's through open router which is a different provider to ollama, and it is an issue distinct to the super 3 model, 3743 is far to broad of a ticket to be a duplicate of this - which is model specific