When Google announced the Pixel 6 and Pixel 6 Pro, many are curious about the "self-design" chipset Tensor but it seems that Tensor may just be a rebranded version of Samsung's unreleased Exynos 9855, which Samsung has been working on for more than a year.
According to GalaxyClub, The Exynos 9855 has another codename called Whitechapel, which is still used internally by Google for Tensor. Apparently, the SoC was developed at the same time as Samsung's other SoC Exynos 9925, which supposedly will be marketed as Exynos 2200 next year when it launches in the Galaxy S22 series.
Going by the model numbers, Tensor is expected to be somewhere between Galaxy S21's Exynos 2100 and the upcoming Exynos 2200 in terms of performance, but closer to the former. However, it is worth noting that Samsung is planning to bring the AMD RDNA 2 GPU to the Exynos 2200.