fix(deps): correct minimum versions for supported Python releases

.circleci/config.yml

@@ -359,6 +359,14 @@ jobs:
             uv run --no-sync python tests/windows_tests/check_windows_wheel_install.py
 
   base_sdk_install:
+    parameters:
+      python_version:
+        type: string
+        default: "3.12"
+      resolution:
+        type: enum
+        enum: ["highest", "lowest-direct"]
+        default: "highest"
     docker:
       - image: cimg/python:3.12@sha256:9c796c23c84e84a66a964acb508d39dc5433c81a47e07efd56dccbbc2427e07c
         auth:
@@ -381,8 +389,9 @@ jobs:
           environment:
             UV_HTTP_TIMEOUT: "300"
           command: |
-            uv venv /tmp/base-sdk --python 3.12
-            VIRTUAL_ENV=/tmp/base-sdk uv pip install dist/*.whl
+            uv venv /tmp/base-sdk --python "<< parameters.python_version >>"
+            uv pip install --python /tmp/base-sdk/bin/python \
+              --resolution "<< parameters.resolution >>" --no-sources -r pyproject.toml dist/*.whl
             /tmp/base-sdk/bin/python tests/base_sdk_tests/check_base_sdk_install.py
 
   local_testing_part1:
@@ -3026,6 +3035,13 @@ workflows:
       - provider_replay_harness
       - base_sdk_install:
           filters: *main_branches
+      - base_sdk_install:
+          name: base_sdk_minimum_<< matrix.python_version >>
+          resolution: lowest-direct
+          matrix:
+            parameters:
+              python_version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+          filters: *main_branches
       - local_testing_part1:
           filters: *main_branches
       - local_testing_part2:

pyproject.toml

@@ -18,13 +18,15 @@ dependencies = [
     "httpx[http2]>=0.28.0,<1.0",
     "openai>=2.20.0,<3.0.0",
     "python-dotenv>=1.0.0,<2.0",
-    "tiktoken>=0.8.0,<1.0",
+    "tiktoken>=0.8.0,<1.0; python_version < '3.14'",
+    "tiktoken>=0.12.0,<1.0; python_version >= '3.14'",
     "importlib-metadata>=8.0.0,<9.0",
     "tokenizers>=0.21.0,<1.0",
     "click>=8.0.0,<9.0",
     "jinja2>=3.1.6,<4.0",
     "aiohttp>=3.14.2,<4.0",
-    "pydantic>=2.10.0,<3.0.0",
+    "pydantic>=2.11.0,<3.0.0; python_version < '3.14'",
+    "pydantic>=2.12.0,<3.0.0; python_version >= '3.14'",
     "pydantic-settings>=2.14.1,<3.0",
     "jsonschema>=4.0.0,<5.0",
     "boto3>=1.43.1,<2.0",