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GitHub Copilot: GPT-6 Luna Now Available

GitHub CopilotView original changelog

GitHub Copilot added GPT-6 Luna, OpenAI's lightweight, lowest-cost model in the GPT-6 family, to its model picker for fast, high-volume coding tasks. Priced at just $0.10 input / $0.50 output per million tokens, Luna targets smaller, well-defined jobs, and OpenAI says it can match the prior generation's Sol-tier accuracy at a fraction of the cost when run at higher effort. The model is available to every paid Copilot tier, from Pro through Enterprise.

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Key Takeaways

  • The YouTube video "GPT-6 Sol Is Here (50% Cheaper!)" covers the joint Sol/Luna launch, framing Luna as the family's rock-bottom-cost pick for simple, high-volume tasks.
  • OpenAI says Luna run at a higher effort setting can match GPT-5.6 Sol's accuracy at about a hundredth of the cost, illustrating how far the price/performance curve moved with this release.
  • Coverage positions Luna for clerical-style work, summarizing documents, extracting information, or answering quick questions, rather than complex agentic coding.
  • Luna joins GPT-6 Astra and GPT-6 Sol to round out a full three-tier GPT-6 lineup inside GitHub Copilot.
  • GPT-6 Luna is priced at just $0.10 input / $0.50 output per million tokens, the cheapest model GitHub Copilot currently offers.
  • Luna is available to every paid Copilot tier, from Pro through Enterprise, making it the most broadly accessible of the three new GPT-6 models.

Sources & Mentions

5 external resources covering this update

GPT-6 Sol Is Here (50% Cheaper!)

YouTube

OpenAI launches GPT-6 Sol and Luna, boasting lower cost and fewer mistakes

TechCrunch

OpenAI releases GPT-6 Sol and Luna models, slashing API costs 50% or more

VentureBeat

OpenAI upgrading ChatGPT and Codex with two more GPT-6 models

9to5Mac

OpenAI cuts GPT-6 prices in half with Sol and Luna

The Next Web

GPT-6 Luna Becomes GitHub Copilot's Cheapest ModelGitHub Copilot added GPT-6 Luna, the lightweight, cost-efficient entry in OpenAI's GPT-6 family, to its model picker as the lowest-cost option available in Copilot. GitHub positions Luna for smaller, faster, well-defined tasks rather than complex agentic workflows, the kind of high-volume, narrowly scoped requests where a heavier reasoning model would be overkill.

Big Price Drop, Comparable Results at Higher EffortOpenAI priced GPT-6 Luna at $0.10 per million input tokens and $0.50 per million output tokens, roughly half of the prior GPT-5.6 Luna generation's pricing. According to OpenAI, Luna run at a higher effort setting can match GPT-5.6 Sol's accuracy at about a hundredth of the cost, a result TechCrunch and VentureBeat both highlighted as part of a broader push by OpenAI to undercut rivals on price across its smaller models.

AvailabilityGPT-6 Luna is available to every paid GitHub Copilot tier: Pro, Pro+, Max, Business, and Enterprise, under usage-based billing. It can be selected in Visual Studio Code, Visual Studio, Copilot CLI, the GitHub Copilot cloud agent, the GitHub Copilot app, github.com, GitHub Mobile, JetBrains IDEs, Xcode, and Eclipse, with gradual rollout and default-on access managed through Copilot's model policy for Enterprise and Business admins.

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