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Claude Opus 5 vs GPT 5.3 Chat

Claude Opus 5 leads on average score with 7.5 vs 7.5. GPT 5.3 Chat has the lower benchmark cost at $0.533 vs $1.550. GPT 5.3 Chat is faster at 6.56s vs 7.65s, with pass rates of 57.6% vs 65.2%.

Last updated at: 2026-09-07

Compared models

Rank
#97
Total Output Tokens
24,866
Response Time (avg)
7.65s
Total Cost
$1.550
Rank
#101
Total Output Tokens
28,179
Response Time (avg)
6.56s
Total Cost
$0.533
Recommended model GPT 5.3 Chat

Its score stays close to the best score here (7.5 vs 7.5), while costing about 2.9x less than Claude Opus 5.

Detailed comparison

Metric Claude Opus 5 Claude Opus 5 none Release: 2026-07-25 GPT 5.3 Chat GPT 5.3 Chat none Release: 2026-03-03
Score 7.5 7.5
Rank #97 #101
Reliability 10.0 10.0
Consistency 9.6 8.6
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 57.6% 65.2%
Flaky tests 1 4
Total Runs 66 66
Cost per result 12.912 4.097
Total Cost $1.550 $0.533
Input Price $5.000 / 1M $1.750 / 1M
Output Price $25.000 / 1M $14.000 / 1M
Total Input Tokens 185,547 78,846
Output Tokens 24,866 28,179
Reasoning Tokens 0 0
Response Time (avg) 7.65s 6.56s
Response Time (max) 47.72s 18.33s
Response Time (total) 168.35s 137.77s
Parameters ~5T total (~500B active) ~400B total (~17B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#97 Claude Opus 5

none
Cost
$0.271
Time
149.3s
Tokens
10,962 tok

#101 GPT 5.3 Chat

none
Cost
$0.008
Time
8.1s
Tokens
634 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
Claude Opus 5 5.9 9.7 33.3% 0 5.54s 10,590 2,886 0
GPT 5.3 Chat 5.6 4.7 55.6% 2 10.52s 7,302 6,632 0

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