feat: Add comprehensive GPT-5 series model support
- Add GPT-5, GPT-5-mini, and GPT-5-nano models to unified configuration
- Implement proper thinking mode support via dynamic capability checking
- Add OpenAI provider model enumeration methods for registry integration
- Update tests to cover all GPT-5 models and their aliases
- Fix critical bug where thinking mode was hardcoded instead of using model capabilities
Breaking Changes:
- None (backward compatible)
New Models Available:
- gpt-5 (400K context, 128K output, reasoning support)
- gpt-5-mini (400K context, 128K output, efficient variant)
- gpt-5-nano (400K context, fastest/cheapest variant)
Aliases:
- gpt5, gpt5-mini, gpt5mini, gpt5-nano, gpt5nano, nano
All models support:
- Extended thinking mode (reasoning tokens)
- Vision capabilities
- JSON mode
- Function calling
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
4930824052