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YouTrack · 2026-04-27

Gist: JetBrains says GPT-5.5 now runs in its AI Chat, Codex integration, and Junie across its IDEs. Internal evals versus GPT-5.4 show about 40% faster output, 80% fewer errors, and 60% lower cost.

Signal reason: The primary subject is a new model rollout across existing AI features and integrations.

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