A judge has dismissed the majority of claims in a copyright lawsuit filed by developers against GitHub, Microsoft, and OpenAI.

The lawsuit was initiated by a group of developers in 2022 and originally made 22 claims against the companies, alleging copyright violations related to the AI-powered GitHub Copilot coding assistant.

Judge Jon Tigar’s ruling, unsealed last week, leaves only two claims standing: one accusing the companies of an open-source license violation and another alleging breach of contract. This decision marks a substantial setback for the developers who argued that GitHub Copilot, which uses OpenAI’s technology and is owned by Microsoft, unlawfully trained on their work.

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Despite this significant ruling, the legal battle is not over. The remaining claims regarding breach of contract and open-source license violations are likely to continue through litigation.