{"slug": "openai-expands-gpt-6-lineup-with-sol-and-luna-at-half-the-price", "title": "OpenAI expands GPT-6 lineup with Sol and Luna at half the price", "summary": "OpenAI launched GPT-6 Sol and GPT-6 Luna, two faster, cheaper models in its GPT-6 family, with API prices 50% below the promotional pricing of their GPT-5.6 predecessors. GPT-6 Sol costs $2 per million input tokens and $10 per million output tokens, down from $4 and $20 for GPT-5.6 Sol, while GPT-6 Luna costs $0.10 per million input tokens and $0.50 per million output tokens. OpenAI said GPT-6 Sol scored 33.2% on AutomationBench at xhigh effort and 68.8% on DeepSWE 1.1, and that GPT-6 Luna scored 66.6% on DeepSWE at maximum effort with task costs 93% below Claude Opus 5 and 96% below Claude Fable 5.", "body_md": "OpenAI official logo (public domain, Wikimedia Commons) — CryptoBriefing brand treatment\n\n# OpenAI expands GPT-6 lineup with Sol and Luna at half the price\n\nThe new models bring GPT-6 capability improvements to faster and cheaper tiers for coding, professional work and agents.\n\nOpenAI has [launched](https://openai.com/index/introducing-gpt-6-sol-and-luna/) GPT-6 Sol and GPT-6 Luna, expanding its latest model family with faster and more affordable options following the release of GPT-6 Astra earlier this month.\n\nOpenAI said API prices for both models are 50% lower than the promotional pricing of their GPT-5.6 predecessors, helped by improvements in inference and caching.\n\nGPT-6 Sol costs $2 per million input tokens and $10 per million output tokens, down from $4 and $20 for GPT-5.6 Sol. GPT-6 Luna costs $0.10 per million input tokens and $0.50 per million output tokens.\n\nThe models use similar training methods to GPT-6 Astra, with improvements spanning professional work, factuality, coding, computer use and alignment. Astra remains OpenAI’s most capable model for workloads where maximum performance matters.\n\nOn AutomationBench, GPT-6 Sol at xhigh effort scored 33.2%, ahead of Claude Opus 5 at max effort and Claude Fable 5.1 with Opus fallback, while OpenAI said it completed tasks at substantially lower cost.\n\n### AI, tech, and the markets they move—in one daily briefing.\n\nDaily. Free. Join 34,000+ readers across crypto, finance, and policy.\n\nCoding performance also improved. GPT-6 Sol matched Claude Fable 5.1 on FrontierCode at a lower cost and scored 68.8% on DeepSWE 1.1, within 1.1 percentage points of Fable’s highest reported score while costing about 80% less per task, according to OpenAI.\n\nGPT-6 Luna is aimed at even lower cost workloads. On DeepSWE, Luna scored 66.6% at maximum effort, with OpenAI estimating task costs 93% below Claude Opus 5 and 96% below Claude Fable 5 at the compared settings.\n\nOpenAI also said GPT-6 Sol produces about half as many factual errors as GPT-5.6 Sol on an internal evaluation based on difficult conversations where users previously flagged mistakes.\n\nThe company has also improved prompt caching across GPT-6, offering discounts of 90% on cached input token reads and higher cache hit rates for long conversations and agents.\n\nGPT-6 Sol and GPT-6 Luna are available in ChatGPT Work and Codex for Plus, Pro, Business, Enterprise and Edu users. GPT-6 Luna is also available to Free and Go users through the desktop app, while both models are available through the API.\n\n**Disclosure:** This article was edited by Editorial Team. For more information on how we create and review content, see our\n\n[Editorial Policy](https://cryptobriefing.com/editorial-policy/).", "url": "https://wpnews.pro/news/openai-expands-gpt-6-lineup-with-sol-and-luna-at-half-the-price", "canonical_source": "https://cryptobriefing.com/openai-gpt6-sol-luna-halve-costs/", "published_at": "2026-09-22 20:45:00+00:00", "updated_at": "2026-09-22 20:52:26.885057+00:00", "lang": "en", "topics": ["artificial-intelligence", "large-language-models", "ai-products", "ai-agents", "ai-tools"], "entities": ["OpenAI", "GPT-6 Sol", "GPT-6 Luna", "GPT-6 Astra", "GPT-5.6 Sol", "Claude Opus 5", "Claude Fable 5.1", "ChatGPT Work"], "alternates": {"html": "https://wpnews.pro/news/openai-expands-gpt-6-lineup-with-sol-and-luna-at-half-the-price", "markdown": "https://wpnews.pro/news/openai-expands-gpt-6-lineup-with-sol-and-luna-at-half-the-price.md", "text": "https://wpnews.pro/news/openai-expands-gpt-6-lineup-with-sol-and-luna-at-half-the-price.txt", "jsonld": "https://wpnews.pro/news/openai-expands-gpt-6-lineup-with-sol-and-luna-at-half-the-price.jsonld"}}