1Expresses admiration that something lives up to its reputation — "as (you'd) expect (from)", "just like (someone)". Usually written in kana.
さすが先生、説明が分かりやすいですね。
As you'd expect from the teacher — the explanation is easy to follow.
さすがプロだね、仕事が速い。
You really are a pro — you work fast.
一人で全部作ったの?さすがだね。
You made all of this by yourself? Impressive.
決勝で勝つとは、さすが強豪校だ。
Winning the final — that's what you'd expect from a powerhouse school.
2Mainly used as 'さすがに ...' to mean 'even so', 'still', or 'after all' — acknowledging a limit was reached or expressing mild surprise despite expectations.
二日続けて徹夜すると、さすがに疲れる。
Staying up two nights in a row is exhausting, even for me.
さすがにこの値段では買えない。
At this price, I really can't afford to buy it.
彼女もさすがに驚いたようだった。
Even she seemed genuinely surprised.
3Used in the pattern 'さすがの X も ...' to mean 'even X, (impressive as they usually are), ...' — emphasizing that even an outstanding person or thing is not immune.
さすがの彼も、この問題は解けなかった。
Even he, as capable as he is, couldn't solve this problem.
さすがのベテラン選手も、今日の暑さには参っていた。
Even the veteran athlete was worn down by today's heat.