OpenAI GPT-5.6 Luna (gpt-5.6-luna) is a low-cost high-volume model with a 1.05M context window, priced at $0.20 input and $1.20 output per 1M tokens.

OpenAI GPT-5.6 Terra: balanced daily driver in the 5.6 family, 400k context, $2.50/$15 per 1M tokens.

OpenAI frontier flagship GPT-5.6 Sol: 1.05M context, effort up to max plus ultra, $5/$30 per 1M tokens.

OpenAI GPT-6 Luna: the cheapest GPT-6 tier at $0.10/$0.50 per 1M tokens with a 1.05M context window and max-effort reasoning.

OpenAI GPT-6 Sol: 1.05M context, reasoning up to max effort and $2/$10 per 1M tokens, with day-one GitHub Copilot support.

OpenAI's previous frontier model: 400k context, 128k max out, $1.75/$14 per 1M tokens. Docs now recommend GPT-5.6 Sol.

San Francisco lab behind ChatGPT and the GPT API. Current flagship is GPT-5.6 Sol; GPT-5.2 remains the previous frontier snapshot.

OpenAI's paid ChatGPT plan for priority access to current GPT models, image tools, and product updates in the official chat client.

OpenAI-compatible AI API gateway: one base URL and key for 60+ models from GPT, Claude, Gemini, DeepSeek, Sora, and VEO, with routing, failover, and unified.

Quora multi-model chat. Add-on $30 per 1M points. Not a free GPT wrapper.

GPT-4o mini (gpt-4o-mini-2024-07-18) has a 128K context and $0.15/$0.60 pricing; OpenAI announced its shutdown for January 14, 2027, recommending GPT-6 Luna.

GPT-4o (gpt-4o) is OpenAI's multimodal model at $2.50/$10 per 1M tokens with 128K context; it is deprecated, with shutdown set for January 14, 2027.

OpenAI GPT-6.1 Sol: near-Astra intelligence for coding, computer use and professional work, priced at one-fifth of GPT-6 Astra's standard API rates.

OpenAI GPT-6.1 Terra is a lower-cost model for visual reasoning, computer use, coding, and high-volume professional workflows.

OpenAI's latest image generation model for fast, high-quality create and edit jobs, with flexible sizes up to 4K and token-based API pricing.