The most OP tanks - ever
A fellow tanker asked a simple question of “what is the most OP regular tank in Blitz of all time?”. A fair question and something I would have not been able to guess.
Of course the definition of the “best” is the one that decides the answer and I have chosen the criteria to be Relative WR - the average of the differences between players' WR in a tank and average WR in their all same tier tanks. And in this case I have calculated it over the time, not during the peak performance of each of the tanks. WG has launched many tank lines with OP tanks, but over the time most of those have been nerfed to reasonable levels or been power-creeped.
The most OP regular tanks of all times
To my surprise the most OP tank of all times is Emil I. It is not that there never have been more OP regular tanks than Emil I, but those have been nerfed and over the time their “average OPness” had been brought under more reasonable levels.

The most OP regular tanks of all times - Table
Show table
Tank |
Relative WR |
Average WR |
Player WR at Tier |
Players |
Battles/Player |
Vehicle Class |
Tank type |
Emil I |
4.7% |
56.1% |
51.4% |
24 296 |
158 |
Heavy Tank |
Researchable |
Vickers Cruiser |
3.6% |
56.7% |
53.1% |
12 992 |
247 |
Light Tank |
Researchable |
LT vz. 38 |
3.39% |
57.2% |
53.8% |
16 928 |
68 |
Light Tank |
Researchable |
Renault R35 |
2.92% |
57.9% |
55% |
49 963 |
64 |
Medium Tank |
Researchable |
Emil II |
2.8% |
53.1% |
50.3% |
5 519 |
207 |
Heavy Tank |
Researchable |
AT 2 |
2.18% |
53.9% |
51.7% |
212 099 |
68 |
Tank Destroyer |
Researchable |
Maus |
2.1% |
53.9% |
51.8% |
30 599 |
426 |
Heavy Tank |
Researchable |
Chi-To SPG |
2.04% |
52.8% |
50.8% |
27 031 |
101 |
Tank Destroyer |
Researchable |
T95 |
2.02% |
53.8% |
51.7% |
31 932 |
409 |
Tank Destroyer |
Researchable |
AMX 50 Foch |
2.01% |
53.7% |
51.7% |
24 769 |
259 |
Tank Destroyer |
Researchable |
Renault Otsu |
1.95% |
57.1% |
55.2% |
47 698 |
50 |
Light Tank |
Researchable |
Ho-Ri Type II |
1.92% |
52.6% |
50.6% |
9 871 |
235 |
Tank Destroyer |
Researchable |
IS-4 |
1.91% |
53.1% |
51.2% |
49 160 |
528 |
Heavy Tank |
Researchable |
S35 CA |
1.89% |
53.8% |
51.9% |
117 502 |
68 |
Tank Destroyer |
Researchable |
FV4004 Conway |
1.86% |
54.1% |
52.3% |
28 732 |
295 |
Tank Destroyer |
Researchable |
AMX 50 Foch (155) |
1.84% |
53.8% |
52% |
21 682 |
453 |
Tank Destroyer |
Researchable |
T1 Heavy Tank |
1.82% |
53.3% |
51.5% |
262 443 |
127 |
Heavy Tank |
Researchable |
T-34-1 |
1.75% |
53.6% |
51.9% |
86 983 |
152 |
Medium Tank |
Researchable |
AMX 12 t |
1.66% |
53.1% |
51.5% |
243 225 |
108 |
Light Tank |
Researchable |
Vickers Mk. F |
1.61% |
54.7% |
53.1% |
25 064 |
68 |
Light Tank |
Researchable |
The most OP tanks of all times
Including premium tanks
But is Emil I the most OP tank in the game all-time - including the premium tanks? Not even close to. It barely fits into the TOP 10. The most OP tank of all the times is of course the legendary Type 98 Ke-Ni Otsu. It was released with wrong parameters and never sold since. WG did not dare to nerf it since some players managed to buy it before WG noticed the mistake. Due to its rarity (and age) it’s not played much and thus it is not visible in the normal tank rankings on BlitzAnalysiz[].

The most OP tanks of all times - Table
Show table
Tank |
Relative WR |
Average WR |
Player WR at Tier |
Players |
Battles/Player |
Vehicle Class |
Tank type |
Type 98 Ke-Ni Otsu |
6.7% |
69.6% |
62.9% |
3 114 |
584 |
Light Tank |
Premium |
KV-220 Beta-Test |
6.41% |
62.4% |
56% |
5 021 |
180 |
Heavy Tank |
Premium |
Chimera |
5.83% |
60.1% |
54.3% |
19 428 |
194 |
Medium Tank |
Premium |
SU-76I |
5.65% |
61.1% |
55.5% |
45 194 |
114 |
Tank Destroyer |
Premium |
Annihilator |
5.4% |
57.7% |
52.3% |
46 426 |
127 |
Heavy Tank |
Premium |
Centurion Mk. 5/1 RAAC |
5.32% |
61.6% |
56.3% |
1 053 |
45 |
Medium Tank |
Premium |
IS-6 Fearless |
5.25% |
67.4% |
62.1% |
558 |
251 |
Heavy Tank |
Premium |
T54E2 |
5.19% |
58.8% |
53.6% |
11 829 |
92 |
Heavy Tank |
Premium |
Object 252U |
5.12% |
57.7% |
52.5% |
44 485 |
153 |
Heavy Tank |
Premium |
Pz.Kpfw. S35 739 (f) |
4.83% |
59.1% |
54.2% |
77 445 |
117 |
Medium Tank |
Premium |
Emil I |
4.7% |
56.1% |
51.4% |
24 296 |
158 |
Heavy Tank |
Researchable |
Pz.Kpfw. 38H 735 (f) |
4.61% |
62.2% |
57.6% |
9 683 |
84 |
Light Tank |
Premium |
Krupp-38(D) |
4.37% |
57.2% |
52.8% |
15 946 |
115 |
Medium Tank |
Premium |
Valentine Mk. IX |
4.25% |
57% |
52.7% |
41 688 |
52 |
Light Tank |
Premium |
WZ-120-1G FT |
4.14% |
58.1% |
53.9% |
23 262 |
470 |
Tank Destroyer |
Premium |
Pz.Kpfw. II Ausf. J |
3.93% |
62.1% |
58.1% |
14 376 |
71 |
Light Tank |
Premium |
Lupus |
3.93% |
57.4% |
53.4% |
16 403 |
212 |
Heavy Tank |
Premium |
Smasher |
3.78% |
57.5% |
53.7% |
37 052 |
373 |
Heavy Tank |
Premium |
T28 Concept |
3.78% |
55.8% |
52% |
37 012 |
142 |
Tank Destroyer |
Premium |
Defender Mk. 1 |
3.76% |
56.3% |
52.5% |
8 507 |
144 |
Medium Tank |
Premium |