NVIDIA-NeMo · kajalj22 · Aug 5, 2026 · Jul 29, 2026 · Jul 29, 2026 · Jul 30, 2026
@@ -27,10 +27,10 @@ concurrency:
 env:
   # Number of parallel shards for the full server suite. Keep in sync with the matrix below.
   NUM_SHARDS: "8"
-  # Pin uv: 0.11.20 has a resolver regression that silently drops pinned deps from
-  # `uv pip install -r requirements.txt` (e.g. matplotlib/scipy/Pillow), breaking
-  # per-server test venvs. 0.11.19 is the latest known-good version.
-  UV_INSTALL_URL: "https://astral.sh/uv/0.11.19/install.sh"
+  # Pin uv: 0.11.21+ supports Python 3.13.14; 0.11.29 is the latest stable.
+  # 0.11.20 had a regression dropping pinned deps (fixed in 0.11.21).
+  # 
+  UV_INSTALL_URL: "https://astral.sh/uv/0.11.29/install.sh"
 
 jobs:
   full-test-suite:
@@ -57,7 +57,7 @@ jobs:
           sudo apt-get update
           sudo apt-get install -y --no-install-recommends git curl ca-certificates
           curl -LsSf "$UV_INSTALL_URL" | sh
-          uv venv --python 3.12
+          uv venv
           source .venv/bin/activate
           uv sync --extra dev --extra sandbox
 
@@ -95,7 +95,7 @@ jobs:
           sudo apt-get update
           sudo apt-get install -y --no-install-recommends git curl ca-certificates
           curl -LsSf "$UV_INSTALL_URL" | sh
-          uv venv --python 3.12
+          uv venv
           source .venv/bin/activate
           uv sync --extra dev
 
@@ -162,7 +162,7 @@ jobs:
       - name: Install wheel in fresh venv
         run: |
           cd /tmp && mkdir -p myproject && cd myproject
-          uv venv --python 3.12 .venv
+          uv venv .venv
           source .venv/bin/activate
           uv pip install $GITHUB_WORKSPACE/dist/*.whl
           python -c "import nemo_gym; print(f'nemo-gym {nemo_gym.__version__}')"

@@ -39,7 +39,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6
         with:
-          python-version: "3.12"
+          python-version-file: .python-version
 
       - name: Refresh SLA labels and dashboard
         env:

@@ -26,9 +26,9 @@ concurrency:
 env:
   # Number of parallel shards for the full server suite. Keep in sync with the matrix below.
   NUM_SHARDS: "8"
-  # Pin uv: 0.11.20 has a resolver regression that silently drops pinned deps from
-  # `uv pip install -r requirements.txt`. 0.11.19 is the latest known-good version.
-  UV_INSTALL_URL: "https://astral.sh/uv/0.11.19/install.sh"
+  # Pin uv: 0.11.21+ supports Python 3.13.14; 0.11.29 is the latest stable.
+  # 0.11.20 had a regression dropping pinned deps (fixed in 0.11.21).
+  UV_INSTALL_URL: "https://astral.sh/uv/0.11.29/install.sh"
 
 jobs:
   detect:
@@ -153,7 +153,7 @@ jobs:
           # The flow below should be used and synced with any Docker or container related flows. There is no script here to keep it 100% explicit.
           # This is how we test and this is how you should use/consume.
           curl -LsSf "$UV_INSTALL_URL" | sh
-          uv venv --python 3.12
+          uv venv
           source .venv/bin/activate
           uv sync --extra dev --extra sandbox
 
@@ -227,7 +227,7 @@ jobs:
           sudo apt-get update
           sudo apt-get install -y --no-install-recommends git curl ca-certificates
           curl -LsSf "$UV_INSTALL_URL" | sh
-          uv venv --python 3.12
+          uv venv
           source .venv/bin/activate
           uv sync --extra dev
 

diff --git a/.python-version b/.python-version
@@ -1 +1 @@
-3.12
+3.13.14
diff --git a/CLAUDE.md b/CLAUDE.md
@@ -119,7 +119,7 @@ gym env resolve --config ...
 ## Code Style
 
 - Line length: 119
-- Python 3.12+, async-first
+- Python 3.13.14+, async-first
 - Ruff for linting and formatting (double quotes, isort)
 - Test coverage must be >= 96%
 - All commits require DCO sign-off (`-s`) and cryptographic signature (`-S`)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -61,7 +61,7 @@ For complete development setup, CI/CD requirements, commit signing, and troubles
 ```bash
 git clone git@github.com:NVIDIA-NeMo/Gym.git
 cd Gym
-uv venv --python 3.12 && source .venv/bin/activate
+uv venv --python 3.13.14 && source .venv/bin/activate
 uv sync --extra dev
 pre-commit install
 ```

diff --git a/README.md b/README.md
@@ -73,7 +73,7 @@ NeMo Gym is designed to run on standard development machines:
 | Hardware Requirements | Software Requirements |
 | --------------------- | --------------------- |
 | **GPU**: Not required for NeMo Gym library operation<br>• GPU may be needed for specific resources servers or model inference (see individual server documentation) | **Operating System**:<br>• Linux (Ubuntu 20.04+, or equivalent)<br>• macOS (11.0+ for x86_64, 12.0+ for Apple Silicon)<br>• Windows (via WSL2) |
-| **CPU**: Any modern x86_64 or ARM64 processor (e.g., Intel, AMD, Apple Silicon) | **Python**: 3.12 or higher |
+| **CPU**: Any modern x86_64 or ARM64 processor (e.g., Intel, AMD, Apple Silicon) | **Python**: 3.13.14 or higher |
 | **RAM**: Minimum 8 GB (16 GB+ recommended for larger environments) | **Git**: For cloning the repository |
 | **Storage**: Minimum 5 GB free disk space for installation and basic usage | **Internet Connection**: Required for downloading dependencies and API access |
 
@@ -85,16 +85,16 @@ NeMo Gym is designed to run on standard development machines:
 
 ## 🚀 Quick Start
 
-Requires Python 3.12+ on x86_64 or ARM64 (Linux, macOS, Windows via WSL2). No GPU required. See the [Getting Started](https://docs.nvidia.com/nemo/gym/main/get-started) docs for a more comprehensive walkthrough.
+Requires Python 3.13.14+ on x86_64 or ARM64 (Linux, macOS, Windows via WSL2). No GPU required. See the [Getting Started](https://docs.nvidia.com/nemo/gym/main/get-started) docs for a more comprehensive walkthrough.
 
 **Install NeMo Gym:**
 
-Requires [uv](https://docs.astral.sh/uv/getting-started/installation/) and Python 3.12+.
+Requires [uv](https://docs.astral.sh/uv/getting-started/installation/) and Python 3.13.14+.
 
 ```bash
 git clone git@github.com:NVIDIA-NeMo/Gym.git
 cd Gym
-uv venv --python 3.12 && source .venv/bin/activate
+uv venv --python 3.13.14 && source .venv/bin/activate
 uv sync
 ```
 

diff --git a/benchmarks/legal_agent_bench/README.md b/benchmarks/legal_agent_bench/README.md
@@ -11,7 +11,7 @@ gitignored benchmark index.
 
 ## Requirements
 
-- Python 3.12 and the repository environment installed with `uv`
+- Python 3.13.13 and the repository environment installed with `uv`
 - Docker with a running daemon
 - Authorized OpenAI-compatible policy and judge endpoints in the root
   `env.yaml`

diff --git a/benchmarks/ruler/prepare_utils.py b/benchmarks/ruler/prepare_utils.py
@@ -60,7 +60,7 @@ def prepare_helper(output_name: str, model: str, length: int, data_format: str =
     output_fpath = DATA_DIR / output_name
 
     run(
-        """uv venv --python 3.12 --allow-existing --seed .venv \
+        """uv venv --python 3.13.14 --allow-existing --seed .venv \
 && source .venv/bin/activate \
 && uv pip install pyyaml bs4 scipy wonderwords html2text tenacity nltk transformers""",
         check=True,

@@ -42,8 +42,8 @@ apt-get clean
 rm -rf /var/lib/apt/lists/*
 EOF
 
-ARG UV_VERSION=0.11.6
-ARG PYTHON_VERSION=3.12.11
+ARG UV_VERSION=0.11.29
+ARG PYTHON_VERSION=3.13.14
 ENV PATH="/root/.local/bin:$PATH"
 RUN curl -LsSf https://astral.sh/uv/${UV_VERSION}/install.sh | sh && \
     uv python install ${PYTHON_VERSION}

@@ -25,7 +25,7 @@ dynamic = [
 ]
 description = "NeMo Gym is a library for building reinforcement learning environments"
 license = {file = "LICENSE"}
-requires-python = ">=3.12"
+requires-python = ">=3.13.14"
 authors = [{ name = "NVIDIA" }]
 maintainers = [{ name = "NVIDIA" }]
 
@@ -57,7 +57,7 @@ classifiers = [
     "Natural Language :: English",
     "Operating System :: OS Independent",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Topic :: Scientific/Engineering",
     "Topic :: Scientific/Engineering :: Artificial Intelligence",
     "Topic :: Scientific/Engineering :: Mathematics",
@@ -200,6 +200,12 @@ dependencies = [
     # License: Apache 2.0 https://github.com/andrew-d/python-multipart/blob/master/LICENSE.txt
     "python-multipart>=0.0.22",
 
+    # pyarrow: columnar data library (transitive dependency via mlflow, pinned for security)
+    # mlflow caps pyarrow<25; versions >=23.0.1 have cp313 wheels and address use-after-free.
+    # Updated: Tue Jul 29, 2026 with pyarrow>=23.0.1
+    # License: Apache 2.0 https://github.com/apache/arrow/blob/main/LICENSE
+    "pyarrow>=23.0.1",
+
     # wandb: E2E rollout collection data and metrics upload
     # Updated: Mon May 19, 2026 with wandb==0.27.0
     # License: MIT https://github.com/wandb/wandb/blob/f8acf479342b6aa8217dd0833bb32190b11c14bc/LICENSE
@@ -321,10 +327,21 @@ required-version = ">=0.9.30"
 constraint-dependencies = [
     "grpcio>=1.81.0rc1",
 ]
+# override-dependencies overrides transitive dep version pins that conflict with
+# Python 3.13 wheel availability. Server venvs inherit this via the editable
+# nemo-gym install (uv >=0.11.24).
+override-dependencies = [
+    # segale pins spacy==3.8.4 which has no cp313 wheels; 3.8.13+ does.
+    "spacy>=3.8.13",
+]
 # NOTE: server venvs install nemo-gym editably and inherit this list, so anything
 # here is also silently dropped from them (uv >=0.11.24). Don't add a package any
 # server needs. Context: https://github.com/NVIDIA-NeMo/Gym/pull/1835
 exclude-dependencies = [
+    # fasttext-wheel has no cp313 wheels and fails to compile on Python 3.13
+    # (missing #include <cstdint> in src/args.cc). Excluded as a transitive dep
+    # of unbabel-comet; wmt_translation does not import fasttext at runtime.
+    "fasttext-wheel",
     # Exclude unwanted dependencies from mlflow
     "alembic",
     "blinker",
@@ -563,7 +580,7 @@ exclude_also = [
 [tool.ruff]
 # Line length configuration
 line-length = 119
-target-version = "py312"
+target-version = "py313"
 
 cache-dir = "cache/.ruff_cache"
 # Exclude common directories that shouldn't be linted

@@ -16,7 +16,7 @@
 [project]
 name = "code-fim"
 version = "0.0.0"
-requires-python = ">=3.12"
+requires-python = ">=3.13.14"
 dependencies = [
     "nemo-gym[dev]",
     "human-eval-infilling",

diff --git a/resources_servers/legal_agent_bench/README.md b/resources_servers/legal_agent_bench/README.md
@@ -12,7 +12,7 @@ criterion with an OpenAI-compatible judge model.
 
 ## Requirements
 
-- Python 3.12 and [uv](https://docs.astral.sh/uv/)
+- Python 3.13.13 and [uv](https://docs.astral.sh/uv/)
 - Docker with a running daemon (the only supported container backend)
 - An OpenAI-compatible policy endpoint and judge endpoint
 - At least 10 GB of free working space for preparation and the first Docker build
@@ -25,7 +25,7 @@ Docker layers.
 From a fresh clone, create the repository environment:
 
 ```bash
-uv venv --python 3.12
+uv venv --python 3.13.14
 source .venv/bin/activate
 uv sync --extra dev
 docker info >/dev/null

diff --git a/resources_servers/longmt_eval/requirements.txt b/resources_servers/longmt_eval/requirements.txt
@@ -20,3 +20,5 @@ scipy
 joblib
 langdetect
 sacrebleu[ja,ko]>=2.4
+# spacy: segale pins spacy==3.8.4 which has no cp313 wheels; longmt_eval
+# is currently incompatible with Python 3.13 until SEGALE updates its dep.
diff --git a/resources_servers/newton_bench/README.md b/resources_servers/newton_bench/README.md
@@ -69,7 +69,7 @@ policy_model_name: Qwen/Qwen3-VL-8B-Thinking
 Run the following from the NeMo Gym repo root in a separate virtual environment configured with `vllm`:
 
 ```bash
-uv venv --python 3.12 --seed
+uv venv --python 3.13.14 --seed
 source .venv/bin/activate
 uv pip install hf_transfer datasets vllm --torch-backend=auto
 

diff --git a/resources_servers/openenv/README.md b/resources_servers/openenv/README.md
@@ -18,7 +18,7 @@ All commands below should be run from the **NeMo-Gym repository root** (the dire
 
 ```bash
 # Set up the project venv
-uv venv --python 3.12 && source .venv/bin/activate
+uv venv --python 3.13.14 && source .venv/bin/activate
 uv sync --extra dev
 ```
 

diff --git a/resources_servers/scicode/requirements.txt b/resources_servers/scicode/requirements.txt
@@ -1,7 +1,7 @@
 -e nemo-gym[dev] @ ../..
 # The executed SciCode solutions + test helpers import these at runtime, so they must be in
-# this server's venv. scipy<1.14 keeps scipy.integrate.simps (removed in 1.14) and has cp312 wheels.
-scipy<1.14
+# this server's venv. scipy>=1.14.1 is required for Python 3.13 wheels.
+scipy>=1.14.1
 numpy
 matplotlib
 h5py

diff --git a/resources_servers/toolsandbox/README.md b/resources_servers/toolsandbox/README.md
@@ -94,7 +94,7 @@ test` build that venv automatically. To set it up manually for development:
 
 ```bash
 cd gym/resources_servers/toolsandbox
-uv venv --seed --python 3.12 .venv && source .venv/bin/activate
+uv venv --python 3.13.14 --seed .venv && source .venv/bin/activate
 uv pip install -r requirements.txt
 ```
 

diff --git a/resources_servers/vlm_eval_kit/README.md b/resources_servers/vlm_eval_kit/README.md
@@ -31,7 +31,7 @@ Rather than using decord, we use decord2 which is compatible with MacOS.
 git clone https://github.com/open-compass/VLMEvalKit
 cd VLMEvalKit
 
-uv venv --python 3.12 --seed
+uv venv --python 3.13.14 --seed
 source .venv/bin/activate
 uv pip install '-e .' rouge
 

@@ -16,7 +16,7 @@
 [project]
 name = "local-vllm-model"
 version = "0.2.0rc0"
-requires-python = ">=3.12"
+requires-python = ">=3.13.14"
 dependencies = [
     "nemo-gym[dev]",
     # VLMEvalKit dependencies

diff --git a/resources_servers/wmt_translation/requirements.txt b/resources_servers/wmt_translation/requirements.txt
@@ -18,6 +18,6 @@ huggingface-hub
 scipy
 # Compact Language Detector v2 (Google CLD2) Python binding. Pure C++
 # extension with no Python deps. Prebuilt wheels exist through cp313, so on
-# the repo-pinned 3.12 (and 3.13) it installs from a wheel. On 3.14 there is
+# the repo-pinned 3.13.14 it installs from a wheel. On 3.14 there is
 # no wheel yet but it could be built from CLD2 source (needs a C++ compiler).
 pycld2>=0.42
@@ -16,7 +16,7 @@
 [project]
 name = "osworld-agent"
 version = "0.0.0"
-requires-python = ">=3.12"
+requires-python = ">=3.13.14"
 dependencies = [
     "nemo-gym[dev]",
     # JeffPengCoder/OSWorld nv-gym at an immutable commit: upstream main
@@ -69,3 +69,6 @@ nemo-gym = { path = "../..", editable = true }
 # not load SurferH, so keep those optional pieces outside the runtime while
 # supplying opencv-python-headless explicitly above.
 exclude-dependencies = ["opencv-python", "opencv-contrib-python", "agp-client"]
+# osworld pins torch<2.6 but torchvision 0.20.x (for torch 2.5.x) has no cp313
+# wheels. Override to 2.12.0 which has cp313 wheels for both torch and torchvision.
+override-dependencies = ["torch>=2.12.0", "torchvision>=0.27.0"]
diff --git a/responses_api_agents/stirrup_agent/README.md b/responses_api_agents/stirrup_agent/README.md
@@ -68,7 +68,7 @@ For each GDPVal task, the agent:
 
 1. **Install NeMo Gym** (see the [top-level README](../../README.md)):
    ```bash
-   uv venv --python 3.12 && source .venv/bin/activate
+   uv venv --python 3.13.14 && source .venv/bin/activate
    uv sync --extra dev
    ```
 2. **Install document-generation dependencies** (needed for the GDPVal deliverable formats —

diff --git a/responses_api_agents/tau2/requirements.txt b/responses_api_agents/tau2/requirements.txt
@@ -4,3 +4,4 @@ tau2[knowledge] @ git+https://github.com/bxyu-nvidia/tau2-bench@bxyu/nemo_gym_st
 # `tau2[knowledge] @ git+URL` direct reference, so bm25/bm25_grep miss rank-bm25.
 rank-bm25>=0.2.2
 openai>=1.0.0
+audioop-lts>=0.2.2
@@ -17,7 +17,7 @@
 name = "genrm-model"
 dynamic = ["dependencies"]
 version = "0.2.0rc0"
-requires-python = ">=3.12"
+requires-python = ">=3.13.14"
 
 [build-system]
 build-backend = "setuptools.build_meta"

@@ -17,7 +17,7 @@
 name = "local-vllm-model"
 dynamic = ["dependencies"]
 version = "0.2.0rc0"
-requires-python = ">=3.12"
+requires-python = ">=3.13.14"
 
 [build-system]
 build-backend = "setuptools.build_meta"

@@ -16,7 +16,7 @@
 [project]
 name = "vllm-model"
 version = "0.2.0rc0"
-requires-python = ">=3.12"
+requires-python = ">=3.13.14"
 dependencies = [
     "nemo-gym[dev]",
 ]