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

The average score is effectively tied at 8.9 vs 8.9. GPT-5.3-Codex (medium) has the lower benchmark cost at $0.920 vs $1.641. GPT-5.3-Codex (medium) is faster at 16.96s vs 162.13s, with pass rates of 80.3% vs 83.3%.

Last updated at: 2026-08-12

Rank
#21
Total Output Tokens
635,380
Response Time (avg)
162.13s
Total Cost
$1.641
Rank
#20
Total Output Tokens
55,525
Response Time (avg)
16.96s
Total Cost
$0.920
Recommended model GPT-5.3-Codex (medium)

It has the best score here (8.9), while costing about 1.8x less 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 8.9 8.9
Rank #21 #20
Reliability 9.9 10.0
Consistency 8.6 8.6
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 80.3% 83.3%
Flaky tests 4 4
Total Runs 66 66
Cost per result 10.255 5.748
Total Cost $1.641 $0.920
Input Price $0.500 / 1M $1.750 / 1M
Output Price $2.500 / 1M $14.000 / 1M
Total Input Tokens 104,686 81,268
Output Tokens 6,646 6,251
Reasoning Tokens 628,734 49,274
Response Time (avg) 162.13s 16.96s
Response Time (max) 584.71s 100.93s
Response Time (total) 3566.76s 373.19s
Parameters ~200B total (~20B active) ~1.2T total (~80B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#21 Seed 2.1 Turbo

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

#20 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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