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OpenAI: GPT-5.3 Chat vs xAI: Grok 4.20 Beta

Last updated at: 2026-03-12

Metric OpenAI: GPT-5.3 Chat GPT-5.3 Chat none Release: 2026-03-03 xAI: Grok 4.20 Beta Grok 4.20 Beta medium Release: 2026-03-12
Rank #20 #24
Avg Score 7.3 7.0
Consistency 8.5 9.0
Cost per result 3.163 5.989
Total Cost $0.317 $0.599
Tests Correct
Attempt pass rate 70.8% 70.8%
Flaky tests 3 2
Total Runs 48 48
Output Tokens 19,272 1,481
Reasoning Tokens 0 86,628
Response Time (avg) 5.96s 8.89s
Response Time (max) 18.33s 24.21s
Response Time (total) 95.30s 142.18s

Top Models by Score

Score vs Total Cost

Response Time (avg)

Avg Score vs Response Time (avg)

Total Output Tokens

Avg Score vs Total Output Tokens

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3 Chat 7.3 7.5 77.8% 1 4.72s 3,091 0
Grok 4.20 Beta 7.0 7.2 88.9% 1 3.19s 262 6,289
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3 Chat 10.0 10.0 100.0% 0 11.96s 2,614 0
Grok 4.20 Beta 10.0 10.0 100.0% 0 20.93s 227 12,212
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3 Chat 9.9 10.0 100.0% 0 2.21s 942 0
Grok 4.20 Beta 9.9 10.0 100.0% 0 4.01s 180 5,281
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3 Chat 10.0 4.4 33.3% 2 13.01s 8,264 0
Grok 4.20 Beta 4.0 10.0 33.3% 0 21.33s 251 40,255
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3 Chat 4.0 10.0 0.0% 0 1.99s 319 0
Grok 4.20 Beta 10.0 10.0 100.0% 0 5.78s 72 3,440
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3 Chat 9.0 10.0 50.0% 0 3.29s 1,455 0
Grok 4.20 Beta 9.0 10.0 50.0% 0 4.97s 57 7,107
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3 Chat 10.0 10.0 100.0% 0 2.93s 1,726 0
Grok 4.20 Beta 7.0 7.2 88.9% 1 3.85s 249 6,660
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3 Chat 10.0 10.0 100.0% 0 8.36s 861 0
Grok 4.20 Beta 10.0 10.0 0.0% 0 12.39s 183 5,384

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