GPT 5.6 Luna
OpenAIGPT-5.6 Luna is a fast, affordable GPT-5.6 model that brings strong capability at the lowest cost in the series.
Explore every AI model currently available in BuiltChat. Compare what each model is designed for, the inputs and tools it supports, and the size of its working context. Model availability may depend on your plan.
For conversation, writing, analysis, coding, research, and tool-assisted work.
GPT-5.6 Luna is a fast, affordable GPT-5.6 model that brings strong capability at the lowest cost in the series.
GPT-5.6 Terra is a balanced GPT-5.6 model for everyday work, with performance comparable to the previous generation at half the cost.
GPT-5.6 Sol is the flagship of OpenAI's GPT-5.6 series, its most capable model for long-horizon agentic work across coding, biology, and cybersecurity.
GPT-6 Astra is OpenAI's most capable model for complex reasoning, coding, computer use, research, and document creation.
GPT-5.5 is OpenAI's frontier reasoning model for complex coding and professional work, with vision, tool use, and adjustable reasoning effort.
GPT-5.4 Nano is OpenAI's fastest, lowest-cost GPT-5.4 model for high-volume tasks such as classification, extraction, ranking, and sub-agents.
Gemini 3.8 Flash is the next iteration in the Gemini 3 model family, featuring algorithmic improvements to its core reasoning foundation.
Gemini 3.5 Flash Lite is a high-efficiency model with upgraded agentic capabilities, making the model ideal for subagents in complex workflows.
Claude Haiku 4.5 is Anthropic's fastest, most efficient Claude model, with strong coding, reasoning, and tool use for high-volume workloads.
Claude Sonnet 5 brings top-tier intelligence at Sonnet pricing, with gains across agentic coding, scalable agents, and everyday professional work.
Claude Opus 5 is latest model in Anthropic's Opus family, delivering major gains over previous generation in agentic coding, professional knowledge work, and long-horizon reasoning.
Claude Fable 5.1 is a safeguarded Mythos-class model for complex, long-running, and asynchronous tasks that require fewer check-ins.
GLM-5.3-Flash is Z.ai’s native multimodal coding model. Its efficient hybrid attention architecture supports visual coding, tool use, and end-to-end professional workflows.
GLM 5.3 delivers comprehensive advancements in complex software engineering and agent capabilities.
DeepSeek V4 Flash is an efficiency-optimized Mixture-of-Experts model, designed for fast inference and high-throughput workloads
DeepSeek V4 Pro is DeepSeek's flagship open-weight Mixture-of-Experts model, built for strong reasoning, coding, and complex agentic tasks.
Grok 4.6 is xAI's frontier multimodal model for coding, engineering, agentic tasks, and professional work.
Kimi K3 is Moonshot AI's 2.8T-parameter open-weight multimodal reasoning model for complex coding, knowledge work, and long-horizon agentic workflows.
Qwen3.8-Flash is Qwen’s fast, cost-efficient multimodal model, combining advanced reasoning and generation. Built for coding, agentic workflows, and visual understanding.
GPT OSS 120B is OpenAI's most powerful open-weight model, with 117 billion parameters and 5.1 billion active parameters per token.
Capabilities shown here come directly from BuiltChat's current model catalog. Models can change as providers release updates or availability changes.