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OpenAI: GPT-5.2 Chat vs xAI: Grok 4.5

Summary

GPT-5.2 Chat vs Grok 4.5 (medium) benchmark comparison: GPT-5.2 Chat leads on average score with 8.5 vs 8.3. GPT-5.2 Chat has the lower benchmark cost at $0.393 vs $1.696. GPT-5.2 Chat is faster at 7.13s vs 62.63s, with pass rates of 74.6% vs 77.8%.

Recommended model: GPT-5.2 Chat - It has the best score here (8.5), while costing about 4.3x less than Grok 4.5 (medium).

Last updated at: 2026-07-08

Metric GPT-5.2 Chat GPT-5.2 Chat none Release: 2025-12-11 Grok 4.5 Grok 4.5 medium Release: 2026-07-08
Score 8.5 8.3
Rank #19 #23
Reliability 10.0 9.9
Consistency 8.9 8.9
Tests Correct
Attempt pass rate 74.6% 77.8%
Flaky tests 3 3
Total Runs 63 63
Cost per result 2.803 11.304
Total Cost $0.393 $1.696
Input Price $1.750 / 1M $2.000 / 1M
Output Price $14.000 / 1M $6.000 / 1M
Total Input Tokens 34,212 53,500
Output Tokens 23,744 1,621
Reasoning Tokens 0 263,127
Response Time (avg) 7.13s 62.63s
Response Time (max) 38.52s 436.38s
Response Time (total) 149.69s 1315.20s

Generation showcase

Hamster playing table tennis

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

#19 GPT-5.2 Chat

none
Cost
$0.010
Time
15.3s
Tokens
797 tok

#23 xAI: Grok 4.5

medium
Cost
$0.044
Time
59.4s
Tokens
7,512 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-5.2 Chat 8.7 7.9 91.7% 1 3.40s 606 1,807 0
Grok 4.5 10.0 10.0 100.0% 0 23.50s 2,991 147 4,018
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 8.8 7.8 88.9% 1 9.82s 7,305 6,731 0
Grok 4.5 7.6 7.2 77.8% 1 155.69s 9,579 390 104,634
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 10.0 10.0 100.0% 0 9.12s 11,019 1,243 0
Grok 4.5 10.0 10.0 100.0% 0 15.65s 15,084 261 4,254
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 10.0 10.0 100.0% 0 3.05s 7,140 980 0
Grok 4.5 10.0 10.0 100.0% 0 6.29s 8,937 225 3,657
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 5.3 10.0 33.3% 0 17.78s 723 7,810 0
Grok 4.5 2.9 7.2 11.1% 1 198.89s 2,212 11 121,922
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 4.4 3.0 33.3% 1 3.20s 477 335 0
Grok 4.5 6.5 3.4 66.7% 1 12.84s 1,077 71 2,384
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 9.8 10.0 100.0% 0 5.51s 660 1,441 0
Grok 4.5 9.8 10.0 100.0% 0 6.06s 1,857 57 2,728
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 7.7 10.0 66.7% 0 4.10s 642 1,603 0
Grok 4.5 10.0 10.0 100.0% 0 7.75s 2,430 254 3,641
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 10.0 10.0 100.0% 0 4.68s 5,445 555 0
Grok 4.5 10.0 10.0 100.0% 0 6.57s 8,544 192 968
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 3.0 10.0 0.0% 0 6.89s 195 1,239 0
Grok 4.5 3.0 10.0 0.0% 0 74.44s 789 13 14,921

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