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GPT-5.3-Codex (medium) vs Grok 4.5 (high)

The average score is effectively tied at 8.9 vs 9.0. GPT-5.3-Codex (medium) has the lower benchmark cost at $0.988 vs $2.252. GPT-5.3-Codex (medium) is faster at 16.91s vs 72.30s, with pass rates of 83.3% vs 86.4%.

Last updated at: 2026-08-29

Rank
#22
Total Output Tokens
60,374
Response Time (avg)
16.91s
Total Cost
$0.988
Rank
#21
Total Output Tokens
324,462
Response Time (avg)
72.30s
Total Cost
$2.252
Recommended model GPT-5.3-Codex (medium)

It has the best score here (8.9), while costing about 2.3x less than Grok 4.5 (high).

Detailed comparison

Metric GPT-5.3-Codex GPT-5.3-Codex medium Release: 2026-02-05 Grok 4.5 Grok 4.5 high Release: 2026-07-08
Score 8.9 9.0
Rank #22 #21
Reliability 10.0 10.0
Consistency 8.6 8.9
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 83.3% 86.4%
Flaky tests 4 3
Total Runs 66 66
Cost per result 6.171 12.565
Total Cost $0.988 $2.252
Input Price $1.750 / 1M $2.000 / 1M
Output Price $14.000 / 1M $6.000 / 1M
Total Input Tokens 81,187 152,175
Output Tokens 6,258 5,655
Reasoning Tokens 54,116 318,807
Response Time (avg) 16.91s 72.30s
Response Time (max) 100.93s 676.83s
Response Time (total) 372.03s 1590.56s
Parameters ~1.2T total (~80B active) ~1.7T total (~170B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#22 GPT-5.3-Codex

medium
Cost
$0.049
Time
54.9s
Tokens
3,580 tok

#21 SpaceXAI: Grok 4.5

high
Cost
$0.015
Time
29.7s
Tokens
2,737 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
GPT-5.3-Codex 10.0 10.0 100.0% 0 19.50s 7,302 535 10,890
Grok 4.5 10.0 10.0 100.0% 0 155.16s 9,579 357 100,752

Quick Compare

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