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Anthropic: Claude Opus 4.6 vs OpenAI: GPT-5.6 Terra

GPT-5.6 Terra (medium) leads on average score with 7.8 vs 7.7. GPT-5.6 Terra (medium) has the lower benchmark cost at $0.676 vs $3.059. GPT-5.6 Terra (medium) is faster at 7.11s vs 34.27s, with pass rates of 63.6% vs 69.7%.

Recommended modelGPT-5.6 Terra (medium)It has the best score here (7.8), while costing about 4.5x less than Claude Opus 4.6 (medium).

Last updated at: 2026-07-25

Metric Claude Opus 4.6 Claude Opus 4.6 medium Release: 2026-02-05 GPT-5.6 Terra GPT-5.6 Terra medium Release: 2026-07-09
Score 7.7 7.8
Rank #50 #46
Reliability 10.0 10.0
Consistency 8.8 9.3
Tests Correct
Attempt pass rate 63.6% 69.7%
Flaky tests 3 2
Total Runs 66 66
Cost per result 23.524 4.825
Total Cost $3.059 $0.676
Input Price $5.000 / 1M $2.500 / 1M
Output Price $25.000 / 1M $15.000 / 1M
Total Input Tokens 108,615 79,175
Output Tokens 72,286 4,878
Reasoning Tokens 28,315 26,952
Response Time (avg) 34.27s 7.11s
Response Time (max) 151.51s 41.68s
Response Time (total) 513.99s 156.42s

Hamster playing table tennis

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

#50 Claude Opus 4.6

medium
Invalid SVG
Cost
$0.000
Time
300.0s
Tokens
0 tok

#46 GPT-5.6 Terra

medium
Cost
$0.035
Time
16.3s
Tokens
2,418 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 4.6 5.7 7.1 44.4% 1 30.10s 8,522 13,057 4,121
GPT-5.6 Terra 6.1 7.2 55.6% 1 7.19s 7,302 427 4,527

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