GPT-5.6, Gemini Robotics 2, and GitHub Stacked PRs Top Dev Highlights This Week

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Between July 28–31, several notable developments emerged across AI and developer tooling. OpenAI launched GPT-5.6, positioning it around cost efficiency rather than raw capability improvements, targeting teams concerned about rising API costs. Google DeepMind published Gemini Robotics 2, claiming whole-body coordination for robots in unstructured environments, though independent real-world validation is still awaited. GitHub introduced stacked pull requests in public preview, a workflow feature that allows chained, reviewable diffs long available in third-party tools like Graphite. Meanwhile, a widely circulated essay argued that LLM-assisted coding delivers roughly 2x productivity gains in practice, not the 10x or higher figures often claimed, a finding consistent with many developers' hands-on experience.

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