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Seed 2.1 Turbo (high) vs GPT-5.3-Codex (medium)

The average score is effectively tied at 9.1 vs 9.1. GPT-5.3-Codex (medium) has the lower benchmark cost at $1.318 vs $1.892. GPT-5.3-Codex (medium) is faster at 18.87s vs 170.52s, with pass rates of 79.7% vs 84.1%.

Last updated at: 2026-11-10

Compared models

Rank
#50
Total Output Tokens
707,320
Response Time (avg)
170.52s
Total Cost
$1.892
Rank
#45
Total Output Tokens
66,287
Response Time (avg)
18.87s
Total Cost
$1.318
Recommended model GPT-5.3-Codex (medium)

It has the best score here (9.1), while responding about 9.0x faster than Seed 2.1 Turbo (high).

Detailed comparison

Metric Seed 2.1 Turbo Seed 2.1 Turbo high Release: 2026-08-12 GPT-5.3-Codex GPT-5.3-Codex medium Release: 2026-02-05
Score 9.1 9.1
Rank #50 #45
Reliability 10.0 10.0
Consistency 9.0 8.6
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 79.7% 84.1%
Flaky tests 3 4
Total Runs 69 69
Cost per result 11.129 7.753
Total Cost $1.892 $1.318
Input Price $0.500 / 1M $1.750 / 1M
Output Price $2.500 / 1M $14.000 / 1M
Cache Read Price N/A $0.175 / 1M
Cache Write Price N/A N/A
Total Input Tokens 246,954 222,794
Output Tokens 8,378 7,357
Reasoning Tokens 698,942 58,930
Response Time (avg) 170.52s 18.87s
Response Time (max) 584.71s 100.93s
Response Time (total) 3922.04s 433.94s
Parameters ~200B total (~20B active) ~1.2T total (~80B active)
Availability Closed Closed

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Model generation showcase

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#50 Seed 2.1 Turbo

high
Cost
$0.058
Time
355.4s
Tokens
23,053 tok

#45 GPT-5.3-Codex

medium
Cost
$0.049
Time
54.9s
Tokens
3,580 tok

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Category Breakdown

Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Seed 2.1 Turbo 10.0 10.0 100.0% 0 336.02s 8,220 370 194,578
GPT-5.3-Codex 10.0 10.0 100.0% 0 19.50s 7,302 535 10,890

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