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OpenAI: GPT-5.3 Chat vs Poolside: Laguna XS 2.1

Summary

GPT-5.3 Chat vs Laguna XS 2.1 benchmark comparison: GPT-5.3 Chat leads on average score with 7.5 vs 7.0. Laguna XS 2.1 has the lower benchmark cost at $0.036 vs $0.433. GPT-5.3 Chat is faster at 6.34s vs 30.08s, with pass rates of 66.7% vs 44.4%.

Recommended model: Laguna XS 2.1 - Its score stays close to the best score here (7.0 vs 7.5), while costing about 12.3x less than GPT-5.3 Chat.

Last updated at: 2026-07-02

Metric GPT-5.3 Chat GPT-5.3 Chat none Release: 2026-03-03 Laguna XS 2.1 Laguna XS 2.1 medium Release: 2026-07-02 Free Available
Score 7.5 7.0
Rank #47 #67
Reliability 10.0 10.0
Consistency 8.1 9.6
Tests Correct
Attempt pass rate 66.7% 44.4%
Flaky tests 5 1
Total Runs 63 63
Cost per result 3.605 0.392
Total Cost $0.433 $0.036
Input Price $1.750 / 1M $0.060 / 1M
Output Price $14.000 / 1M $0.120 / 1M
Total Input Tokens 34,209 45,324
Output Tokens 26,617 25,761
Reasoning Tokens 0 268,677
Response Time (avg) 6.34s 30.08s
Response Time (max) 18.33s 155.23s
Response Time (total) 133.13s 631.77s

Generation showcase

Hamster playing table tennis

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

#47 GPT-5.3 Chat

none
Cost
$0.008
Time
8.1s
Tokens
634 tok

#67 Laguna XS 2.1

medium
Cost
$0.001
Time
30.6s
Tokens
4,678 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

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3 Chat 6.7 8.1 58.3% 1 3.86s 606 3,167 0
Laguna XS 2.1 4.8 10.0 25.0% 0 41.96s 774 353 73,090
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3 Chat 5.6 4.7 55.6% 2 10.52s 7,302 6,632 0
Laguna XS 2.1 5.5 10.0 33.3% 0 70.35s 7,995 23,767 83,258
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3 Chat 10.0 10.0 100.0% 0 11.96s 11,019 2,614 0
Laguna XS 2.1 9.6 10.0 100.0% 0 13.43s 18,033 507 5,908
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3 Chat 10.0 10.0 100.0% 0 2.21s 7,140 942 0
Laguna XS 2.1 10.0 10.0 100.0% 0 4.50s 7,734 234 3,129
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3 Chat 3.5 4.4 33.3% 2 13.01s 723 8,264 0
Laguna XS 2.1 2.9 7.2 11.1% 1 65.66s 834 17 91,533
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3 Chat 4.6 10.0 0.0% 0 1.99s 477 319 0
Laguna XS 2.1 5.0 10.0 0.0% 0 4.15s 537 119 1,375
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3 Chat 9.8 10.0 100.0% 0 3.51s 660 1,491 0
Laguna XS 2.1 9.8 10.0 100.0% 0 2.57s 753 82 1,844
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3 Chat 10.0 10.0 100.0% 0 2.99s 642 1,758 0
Laguna XS 2.1 5.3 10.0 33.3% 0 3.43s 771 357 3,355
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3 Chat 10.0 10.0 100.0% 0 8.36s 5,445 861 0
Laguna XS 2.1 10.0 10.0 100.0% 0 3.01s 7,638 309 748
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.3 Chat 3.0 10.0 0.0% 0 4.38s 195 569 0
Laguna XS 2.1 3.0 10.0 0.0% 0 10.88s 255 16 4,437

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