Actually the extra_id are from 0-99 and not from 1-100
```
a = tokenizer.encode("we got a <extra_id_99>", return_tensors='pt',add_special_tokens=True)
print(a)
>tensor([[   62,   530,     3,     9, 32000]])
a = tokenizer.encode("we got a <extra_id_100>", return_tensors='pt',add_special_tokens=True)
print(a)
>tensor([[   62,   530,     3,     9,     3,     2, 25666,   834,    23,    26,
           834,  2915,  3155]])
```
# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/5967?src=pr&el=h1) Report
> Merging [#5967](https://codecov.io/gh/huggingface/transformers/pull/5967?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/ae67b2439fb15954bfd8f0fdf521cf1a650bafb9&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/5967/graphs/tree.svg?width=650&height=150&src=pr&token=9qOlN6Hb1c)](https://codecov.io/gh/huggingface/transformers/pull/5967?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master    #5967   +/-   ##
=======================================
  Coverage   78.51%   78.51%           
=======================================
  Files         146      146           
  Lines       26214    26214           
=======================================
  Hits        20581    20581           
  Misses       5633     5633           
```



------

[Continue to review full report at Codecov](https://codecov.io/gh/huggingface/transformers/pull/5967?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/huggingface/transformers/pull/5967?src=pr&el=footer). Last update [ae67b24...e8e003f](https://codecov.io/gh/huggingface/transformers/pull/5967?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
<|||||>Hi @patrickvonplaten, can you have a look?<|||||>Thansk @orena1 !<|||||>pinging @patrickvonplaten for notification