diff --git a/pkgs/development/python-modules/chatlas/default.nix b/pkgs/development/python-modules/chatlas/default.nix
new file mode 100644
index 000000000000..602b45e4a467
--- /dev/null
+++ b/pkgs/development/python-modules/chatlas/default.nix
@@ -0,0 +1,168 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchFromGitHub,
+
+  # build-system
+  hatch-vcs,
+  hatchling,
+
+  # dependencies
+  jinja2,
+  openai,
+  orjson,
+  pydantic,
+  requests,
+  rich,
+
+  # tests
+  anthropic,
+  google-genai,
+  htmltools,
+  matplotlib,
+  pillow,
+  pytest-asyncio,
+  pytest-snapshot,
+  pytestCheckHook,
+  tenacity,
+}:
+
+buildPythonPackage rec {
+  pname = "chatlas";
+  version = "0.13.2";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "posit-dev";
+    repo = "chatlas";
+    tag = "v${version}";
+    hash = "sha256-uCgpNvDJZKwxX4HYF8tyvJ1AiQLmybuxrZkYK/u5xlg=";
+  };
+
+  build-system = [
+    hatch-vcs
+    hatchling
+  ];
+
+  dependencies = [
+    jinja2
+    openai
+    orjson
+    pydantic
+    requests
+    rich
+  ];
+
+  pythonImportsCheck = [ "chatlas" ];
+
+  nativeCheckInputs = [
+    anthropic
+    google-genai
+    htmltools
+    matplotlib
+    pillow
+    pytest-asyncio
+    pytest-snapshot
+    pytestCheckHook
+    tenacity
+  ];
+
+  disabledTestPaths = [
+    # Require an Openai API key and/or internet access
+    "tests/test_batch_chat.py"
+    "tests/test_content.py"
+    "tests/test_provider_anthropic.py"
+    "tests/test_provider_azure.py"
+    "tests/test_provider_databricks.py"
+    "tests/test_provider_google.py"
+    "tests/test_provider_openai.py"
+    "tests/test_provider_snowflake.py"
+    "tests/test_register_tool_models.py"
+  ];
+
+  disabledTests = [
+    # Require an Openai API key
+    "test_async_tool_yielding_multiple_results"
+    "test_basic_export"
+    "test_basic_repr"
+    "test_basic_str"
+    "test_chat_callbacks"
+    "test_chat_structured"
+    "test_chat_structured_async"
+    "test_chat_tool_request_reject"
+    "test_chat_tool_request_reject2"
+    "test_compute_cost"
+    "test_content_tool_request_serializable"
+    "test_cross_provider_compatibility"
+    "test_deepcopy_chat"
+    "test_get_token_prices"
+    "test_get_tools_after_registration"
+    "test_get_tools_empty"
+    "test_google_provider_model_params"
+    "test_google_provider_parameter_mapping"
+    "test_invoke_tool_returns_tool_result"
+    "test_json_serialize"
+    "test_last_turn_retrieval"
+    "test_model_params_integration_with_provider"
+    "test_model_params_kwargs_priority"
+    "test_model_params_preserved_across_calls"
+    "test_modify_system_prompt"
+    "test_old_style_tool_invocation_still_works"
+    "test_parameter_validation_edge_cases"
+    "test_provider_parameter_differences"
+    "test_register_tool"
+    "test_register_tool_duplicate_name_error"
+    "test_register_tool_force_overwrite"
+    "test_register_tool_instance_basic"
+    "test_register_tool_instance_force_overwrite"
+    "test_register_tool_instance_with_custom_name"
+    "test_register_tool_instance_with_model_override"
+    "test_register_tool_with_complex_parameters"
+    "test_register_tool_with_custom_name"
+    "test_register_tool_with_same_name_different_function"
+    "test_set_model_params_all_parameters"
+    "test_set_model_params_basic"
+    "test_set_model_params_empty_call"
+    "test_set_model_params_incremental_updates"
+    "test_set_model_params_invalid_temperature"
+    "test_set_model_params_invalid_top_p"
+    "test_set_model_params_kwargs"
+    "test_set_model_params_kwargs_replacement"
+    "test_set_model_params_missing_values"
+    "test_set_model_params_multiple_unsupported"
+    "test_set_model_params_none_reset"
+    "test_set_model_params_reset_specific_param"
+    "test_set_model_params_type_validation"
+    "test_set_model_params_unsupported_parameter"
+    "test_set_model_params_updates_existing"
+    "test_set_model_params_with_stop_sequences"
+    "test_set_tools_mixed"
+    "test_set_tools_replaces_existing"
+    "test_set_tools_with_functions"
+    "test_set_tools_with_tool_objects"
+    "test_simple_async_batch_chat"
+    "test_simple_batch_chat"
+    "test_simple_streaming_chat"
+    "test_simple_streaming_chat_async"
+    "test_supported_model_params_openai"
+    "test_system_prompt_retrieval"
+    "test_token_count_method"
+    "test_tokens_method"
+    "test_tool_custom_result"
+    "test_tool_yielding_content_tool_results"
+    "test_tool_yielding_multiple_results"
+    "test_tool_yielding_single_result_still_works"
+    "test_tool_yielding_with_error"
+    "test_translate_model_params_openai"
+    "test_unknown_tool_error_format_updated"
+  ];
+
+  meta = {
+    description = "Friendly guide to building LLM chat apps in Python with less effort and more clarity";
+    homepage = "https://posit-dev.github.io/chatlas";
+    downloadPage = "https://github.com/posit-dev/chatlas";
+    changelog = "https://github.com/posit-dev/chatlas/blob/${src.tag}/CHANGELOG.md";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ GaetanLepage ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index dd61169c900c..243b4739d7a6 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2567,6 +2567,8 @@ self: super: with self; {
 
   chat-downloader = callPackage ../development/python-modules/chat-downloader { };
 
+  chatlas = callPackage ../development/python-modules/chatlas { };
+
   check-manifest = callPackage ../development/python-modules/check-manifest { };
 
   checkdmarc = callPackage ../development/python-modules/checkdmarc { };