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Claude Opus 5 vs OpenAI: GPT-5.6 Terra

Claude Opus 5 leads on average score with 7.5 vs 7.5. GPT-5.6 Terra (low) has the lower benchmark cost at $0.519 vs $1.550. GPT-5.6 Terra (low) is faster at 5.31s vs 7.60s, with pass rates of 57.6% vs 74.2%.

Recommended modelGPT-5.6 Terra (low)Its score stays close to the best score here (7.5 vs 7.5), while costing about 3.0x less than Claude Opus 5.

Last updated at: 2026-07-25

Metric Claude Opus 5 Claude Opus 5 none Release: 2026-07-25 GPT-5.6 Terra GPT-5.6 Terra low Release: 2026-07-09
Score 7.5 7.5
Rank #59 #63
Reliability 10.0 10.0
Consistency 9.6 7.9
Tests Correct
Attempt pass rate 57.6% 74.2%
Flaky tests 1 6
Total Runs 66 66
Cost per result 12.912 3.989
Total Cost $1.550 $0.519
Input Price $5.000 / 1M $2.500 / 1M
Output Price $25.000 / 1M $15.000 / 1M
Total Input Tokens 185,550 80,295
Output Tokens 24,866 4,714
Reasoning Tokens 0 16,469
Response Time (avg) 7.60s 5.31s
Response Time (max) 47.72s 19.85s
Response Time (total) 167.28s 116.82s

Hamster playing table tennis

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

#59 Claude Opus 5

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

#63 GPT-5.6 Terra

low
Cost
$0.034
Time
16.8s
Tokens
2,348 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-5.6 Terra 6.6 4.6 77.8% 2 9.56s 7,302 429 6,821

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