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@vapi-tasker vapi-tasker bot commented Jan 31, 2026

Summary

This PR brings the Vapi Python SDK into compliance with the latest OpenAI API specification, adding support for the developer role and new model identifiers.

Changes

HIGH Priority - Developer Role Support

  • Added developer role to MessageRole enum - required for GPT-5.x and o-series models
  • Developer role provides elevated instruction priority over system messages

MEDIUM Priority - Model Sync

  • Added OpenAIModel enum with latest models:
    • GPT-5.2 series (gpt-5.2, gpt-5.2-chat, gpt-5.2-chat-latest, gpt-5.2-codex)
    • O-series reasoning models (o1, o1-mini, o3, o3-mini, o4-mini)
    • GPT-4.1 series (gpt-4.1, gpt-4.1-mini, gpt-4.1-nano)
  • Added supports_developer_role() utility to check model capability
  • Added DEVELOPER_ROLE_MODELS constant for reference

LOW Priority - Deprecation Notice

  • Added deprecation warning for function role (recommend using tool instead)

Additional Improvements

  • Added Message class for structured message creation with validation
  • Enhanced add_message() with name and tool_call_id parameters for tool messages
  • Added say() convenience method for assistant speech
  • Added end_call() convenience method
  • Added comprehensive type hints throughout
  • Added full docstrings with examples
  • Updated Python version support to 3.8-3.12

New Files

  • vapi_python/types.py - Type definitions and utilities
  • tests/test_types.py - Tests for type definitions
  • tests/test_vapi.py - Tests for Vapi class
  • pytest.ini - Test configuration

Backward Compatibility

  • All existing functionality preserved
  • New features are additive only
  • function role still works (with deprecation warning)

Test Plan

  • Unit tests for MessageRole enum
  • Unit tests for validate_role() function
  • Unit tests for Message class
  • Unit tests for OpenAIModel enum
  • Unit tests for supports_developer_role() function
  • Unit tests for Vapi.add_message() with all roles
  • Unit tests for deprecation warning on function role
  • Unit tests for Vapi.say() and Vapi.end_call()
  • Syntax validation of all modules

Related Issue

VAP-11729: Audit and update client SDKs against latest OpenAI spec


Generated with Claude Code

…ions

- Add MessageRole enum with all valid roles including 'developer' role
  (required for GPT-5.x and o-series models)
- Add OpenAIModel enum with latest model identifiers (GPT-5.2 series, o-series)
- Add Message class for structured message creation with validation
- Add supports_developer_role() utility for model capability detection
- Add deprecation warning for 'function' role (recommend 'tool' instead)
- Enhance add_message() with role validation, name, and tool_call_id params
- Add say() and end_call() convenience methods
- Add comprehensive type hints and docstrings throughout
- Add full test coverage for all new functionality
- Update Python version support to 3.8+ and add 3.12 support

Co-Authored-By: Claude <noreply@anthropic.com>
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