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

Seed 2.1 Turbo (low) leads on average score with 9.1 vs 8.9. GPT-5.3-Codex (medium) has the lower benchmark cost at $0.920 vs $1.631. GPT-5.3-Codex (medium) is faster at 16.96s vs 168.41s, with pass rates of 83.3% vs 83.3%.

Last updated at: 2026-08-12

Rank
#15
Total Output Tokens
631,257
Response Time (avg)
168.41s
Total Cost
$1.631
Rank
#20
Total Output Tokens
55,525
Response Time (avg)
16.96s
Total Cost
$0.920
Recommended model GPT-5.3-Codex (medium)

Its score stays close to the best score here (8.9 vs 9.1), while costing about 1.8x less than Seed 2.1 Turbo (low).

Detailed comparison

Metric Seed 2.1 Turbo Seed 2.1 Turbo low Release: 2026-08-12 GPT-5.3-Codex GPT-5.3-Codex medium Release: 2026-02-05
Score 9.1 8.9
Rank #15 #20
Reliability 9.9 10.0
Consistency 8.9 8.6
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 83.3% 83.3%
Flaky tests 3 4
Total Runs 66 66
Cost per result 9.591 5.748
Total Cost $1.631 $0.920
Input Price $0.500 / 1M $1.750 / 1M
Output Price $2.500 / 1M $14.000 / 1M
Total Input Tokens 104,483 81,268
Output Tokens 6,848 6,251
Reasoning Tokens 624,409 49,274
Response Time (avg) 168.41s 16.96s
Response Time (max) 739.98s 100.93s
Response Time (total) 3705.09s 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.

#15 Seed 2.1 Turbo

low
Cost
$0.049
Time
298.8s
Tokens
19,730 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% 0 360.85s 8,220 385 207,368
GPT-5.3-Codex 10.0 10.0 100.0% 0 19.50s 7,302 535 10,890

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