Compare AI tools

	OpenAI Voice / Realtime S	OpenRouter S	GitHub Copilot B	Claude Code S
Tagline	ChatGPT's voice + the Realtime API for developers.	One API, every model. Pay-as-you-go, no subscriptions.	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	Anthropic's CLI agent. Opus-powered, operates on your repo directly.
Category	voice	dev platform	coding	coding
Pricing	Voice included with ChatGPT Plus; Realtime API by usage	Pay per token — model-dependent	Free (limited) + $10/mo Pro + $19/mo Business	Part of Claude Pro/Max/Team plans
Best for	Voice chat users, developers building voice agents on OpenAI.	Developers experimenting across models. Apps that want fallback logic.	Teams with GitHub already. Devs who don't want to change IDEs.	Developers who want an agent, not autocomplete. Large refactors, tests, docs.
Strengths	Advanced Voice Mode feels genuinely conversational Realtime API enables true two-way voice apps Built into ChatGPT	300+ models from one endpoint Automatic fallbacks between providers No subscription — just pay what you use	Great enterprise story Works in your existing IDE Chat + autocomplete	Runs locally, edits your actual files Strong on large codebases with 1M context Great at multi-step tasks
Weaknesses	Pricey for production apps Less voice variety than ElevenLabs Platform lock-in	Slight markup over direct API Some provider features not exposed	Less agentic than Cursor/Claude Code Model quality varies	Terminal-based — learning curve Can't be used without Claude subscription
Kai's verdict	S-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.	S-tier for model-shopping. I use this for every prototype before committing.	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.
Link	Open →	Open →	Open →	Open →