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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 $0.988 vs $1.797. GPT-5.3-Codex (medium) is faster at 16.91s vs 173.96s, with pass rates of 78.8% vs 83.3%.

Last updated at: 2026-09-24

Compared models

Rank
#40
Total Output Tokens
697,731
Response Time (avg)
173.96s
Total Cost
$1.797
Rank
#37
Total Output Tokens
60,374
Response Time (avg)
16.91s
Total Cost
$0.988
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 #40 #37
Reliability 10.0 10.0
Consistency 8.9 8.6
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 78.8% 83.3%
Flaky tests 3 4
Total Runs 66 66
Cost per result 11.230 6.171
Total Cost $1.797 $0.988
Input Price $0.500 / 1M $1.750 / 1M
Output Price $2.500 / 1M $14.000 / 1M
Total Input Tokens 104,695 81,187
Output Tokens 6,645 6,258
Reasoning Tokens 691,086 54,116
Response Time (avg) 173.96s 16.91s
Response Time (max) 584.71s 100.93s
Response Time (total) 3827.19s 372.03s
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.

#40 Seed 2.1 Turbo

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

#37 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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