GPT-5.6 Luna: the fast, low-cost tier. Tuned for high-volume, latency-sensitive work like chat, classification, and lightweight agents, with real GPT-5.6 reasoning. openrouter.ai/openai/gpt-5.6… Link GPT-5.6 Luna - API Pricing & Providers GPT-5.6 Luna is a fast,…

GPT-5.6 Terra: the balanced everyday driver. Coding, reasoning, and agentic tasks at GPT-5.5-competitive quality for roughly 2x lower cost. openrouter.ai/openai/gpt-5.6… Link GPT-5.6 Terra - API Pricing & Providers GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6…

GPT-5.6 Sol: the flagship. Built for complex reasoning, multi-step coding, and long-horizon agentic work, with particular strength on command-line tasks. openrouter.ai/openai/gpt-5.6… Link GPT-5.6 Sol - API Pricing & Providers GPT-5.6 Sol is the flagship model in OpenAI's…

GPT-5.6 is live on OpenRouter! Sol (flagship), Terra (balanced), and Luna (fast + low-cost). In our early testing, the 5.6 models were more token efficient, leading to lower cost and faster time to task completion. AA's results agree. More on Sol, Terra, and Luna below 🧵

Read more: x.ai/news/grok-4-5 Link Introducing Grok 4.5 Grok 4.5 is SpaceXAI's smartest model built for coding, agentic tasks, and knowledge work. x.ai