GPT-6 Sol and GPT-6 Luna are now available

Release date: September 22, 2026

OpenAI adds Sol and Luna alongside Astra in the GPT-6 family. Sol targets complex coding and agentic workflows; Luna is designed for focused tasks at high volume. OpenAI reports improvements over the GPT-5.6 generation in coding, factuality, and communication.

BetterToken now supports GPT-6 Sol and GPT-6 Luna. Set the Base URL to https://bettertoken.ai/v1, and use gpt-6-sol or gpt-6-luna. The official model name is Sol, not Sora.

Check the model plaza for current BetterToken availability and pricing.

Which model to choose

• gpt-6-sol: for complex coding and agentic workflows.
• gpt-6-luna: for focused, repeatable, high-volume tasks.

Highlights

• Large context: OpenAI lists a 1,050,000-token context window and up to 128,000 output tokens for both models.
• Adjustable reasoning: both support none, low, medium, high, xhigh, and max reasoning effort.
• Everyday work: OpenAI reports gains over GPT-5.6 in coding, factual accuracy, and clearer technical responses.

Connect them

1. Create a BetterToken API Key.
2. Select GPT and use https://bettertoken.ai/v1 as the Base URL.
3. Use gpt-6-sol for demanding agent workflows or gpt-6-luna for repeatable high-volume tasks.
4. Run a representative request and compare quality, latency, and token usage.

Use the Codex CLI setup guide or the model selection guide.

Official sources

• GPT-6 Sol and GPT-6 Luna announcement
• GPT-6 Sol API reference
• GPT-6 Luna API reference