Can teams still use GPT-4 Turbo in Copilot after the Polaris rollout?
According to reports, an optional three-month fallback period is available for teams that need it, running from August through November 2026. After November, Polaris reportedly becomes the only default option, meaning teams that want to continue using GPT-4 Turbo would need to evaluate alternative arrangements outside Copilot's standard offering.
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Microsoft Just Replaced GPT-4 Inside GitHub Copilot With Its Own ModelProject Polaris, Microsoft's in-house coding model, is reportedly replacing GPT-4 Turbo as the default engine behind GitHub Copilot for all subscribers.
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More development best practices questions
- What is Project Polaris and how does it relate to GitHub Copilot?
- What architecture does Project Polaris use?
- How does Project Polaris perform compared to GPT-4 Turbo on coding benchmarks?
- When did the Project Polaris rollout to Copilot subscribers begin?
- How many outage reports did Claude and ChatGPT get on July 14, 2026?
- What did Anthropic's own status page say about the July 14 Claude outage?
- Did Claude have more outages after July 14?
- What did ChatGPT's status checker say was wrong?
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