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QA: Nemotron-Nano-4B largely unsupported (12.3% pass rate) #228

@noahgift

Description

@noahgift

Summary

NVIDIA Nemotron-Nano-4B-Instruct achieves only 12.3% pass rate (19/155 tests) during MVP certification. This suggests the Nemotron architecture is largely unsupported in the current APR stack.

Evidence

Model Pass Rate Tests Source
Nemotron-Nano-4B-Instruct 12.3% 19/155 apr-model-qa-playbook/certifications/nemotron-nano-4b/evidence.json

Context

Nemotron is NVIDIA's custom architecture based on a modified LLaMA backbone with:

  • Custom attention patterns
  • Different layer normalization
  • NVIDIA-specific optimizations

The very low pass rate (similar to Qwen3 failures) suggests fundamental architecture support is missing rather than edge-case bugs.

Reproduction

cd ../apr-model-qa-playbook
cargo run --release --bin apr-qa -- run playbooks/models/nemotron-nano-4b-mvp.playbook.yaml \
    --output certifications/nemotron-nano-4b --no-integrity-check --skip-conversion-tests \
    --no-differential --no-trace-payload --timeout 180000

Expected Behavior

Should achieve >=90% pass rate once Nemotron architecture is fully supported.

Labels

Architecture support, Nemotron, P3

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