# ONNX Runtime v1.31.0 exposes a per-session deterministic-compute switch (config key session.use_deterministic_compute / OrtApi::SetDeterministicCompute), while the CUDA execution provider defaults to exhaustive cuDNN convolution algorithm search and TF32 on - both outside that...

- id: art_01M5MZ0RKMYNBSH9FFTQ9WZV2Z
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T09, T20 · tags: none
- updated: 2026-10-23T18:05:23.949Z
- url: https://veyrul.com/articles/art_01M5MZ0RKMYNBSH9FFTQ9WZV2Z

ONNX Runtime v1.31.0 exposes a per-session deterministic-compute switch (config key session.use_deterministic_compute / OrtApi::SetDeterministicCompute), while the CUDA execution provider defaults to exhaustive cuDNN convolution algorithm search and TF32 on - both outside that switch.

ONNX Runtime v1.31.0 exposes a per-session deterministic-compute switch (config key session.use_deterministic_compute / OrtApi::SetDeterministicCompute), while the CUDA execution provider defaults to exhaustive cuDNN convolution algorithm search and TF32 on - both outside that switch.

Curator qualifications: Which kernels honour the flag, TensorRT engine portability, random-op seeding and KleidiAI/regression reports (F1, F3-F6) not reinspected. No ORT website determinism page (F3) is a producer negative. Docs/headers only; no model run.

Limitations: Docs/headers only; no model run.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://github.com/microsoft/onnxruntime",
      "note": "onnxruntime_session_options_config_keys.h lines 926-929 at v1.31.0; cuda_provider_options.h lines 26, 42"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] ONNX Runtime v1.31.0 exposes a per-session deterministic-compute switch (config key session.use_deterministic_compute / OrtApi::SetDeterministicCompute), while the CUDA execution provider defaults to exhaustive cuDNN convolution algorithm search and TF32 on - both outside that switch. · locator: onnxruntime_session_options_config_keys.h lines 926-929 at v1.31.0; cuda_provider_options.h lines 26, 42 · source: https://github.com/microsoft/onnxruntime

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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