OpenRouter
Unified API for 200+ models. One API key, one billing dashboard. OpenAI, Anthropic, Google, Meta, Mistral, and more. Automatic fallbacks and load balancing.
OpenRouter gives you a single API endpoint to access every major AI model — OpenAI (GPT-4o, o3), Anthropic (Claude), Google (Gemini), Meta (Llama), Mistral, and 200+ more. One API key, unified billing, automatic fallbacks if a provider is down. It's essential for comparing models without managing multiple API keys and billing accounts. I use it when I need to quickly swap between models for testing or when building apps that should work across providers.
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Unified API for 200+ models. One API key, one billing dashboard. OpenAI, Anthropic, Google, Meta, Mistral, and more. Automatic fallbacks and load balancing.
Try OpenRouterMore AI Models Tools
Claude
Anthropic's AI. Opus 4.6 for hard problems, Sonnet 4.6 for speed, Haiku 4.5 for cost. 200K context window. Best coding model I've tested. Max plan ($200/mo).
ChatGPT
OpenAI's flagship. GPT-4o for general use, o3 for reasoning, Codex for coding. 300M+ weekly users. Tasks, agents, web browsing, DALL-E, code interpreter.