GitHub adds Kimi K3 open-weight model to Copilot with gradual rollout across developer tools

GitHub has added Kimi K3 to GitHub Copilot, giving developers another selectable model for chat, agent workflows, and coding assistance across its Copilot product line. The company announced the release on August 6, 2026, and said the model is beginning a gradual rollout for Copilot Pro, Pro+, Max, Business, and Enterprise plans.

The move matters because Copilot is increasingly positioned as a model-switching development environment rather than a single assistant tied to one provider. GitHub describes Kimi K3 as an open-weight model with strong agentic coding capabilities and says it is hosted by GitHub on Fireworks AI. In practice, that means eligible users should see the model appear in Copilot model pickers as availability reaches their account or organization.

Where developers can use it

According to GitHub, Kimi K3 is planned for a broad set of Copilot surfaces, including Visual Studio Code, Visual Studio, Copilot CLI, the Copilot cloud agent, the standalone Copilot app, github.com, GitHub Mobile for iOS and Android, JetBrains IDEs, Xcode, and Eclipse. The company cautions that rollout is gradual while it monitors model quality and performance, so not every eligible customer will see the option immediately.

Business and Enterprise customers have an extra administrative step. GitHub says Kimi K3 is off by default for Copilot Business and Copilot Enterprise organizations, and administrators must enable the model policy before users can select it. That reflects a larger governance issue around open-weight models: enterprises may want to evaluate compliance, data handling, and security posture before making a new model available to engineering teams.

Pricing and rollout caveat

GitHub also updated the post during the day with operational notes. It temporarily paused the rollout while mitigating a GitHub Actions incident, then said the rollout had resumed. The changelog states that Kimi K3 is billed under Copilot usage-based billing at provider list pricing. During the pause notice, GitHub listed pricing of $3 per million input tokens, $15 per million output tokens, and $0.30 per million cached input tokens.

For developers, the practical takeaway is that Copilot is adding another coding-specialized model while keeping enterprise controls in front of the rollout. For teams already experimenting with model choice inside developer tools, Kimi K3 expands the menu, but administrators will still need to decide whether the model fits their cost controls and governance rules before enabling it widely.

Sources

• github.blog

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