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Anthropic: Claude Sonnet 5 vs OpenAI: GPT-5.6 Terra

Summary

Claude Sonnet 5 (medium) vs GPT-5.6 Terra (medium) benchmark comparison: The average score is effectively tied at 7.9 vs 7.8. GPT-5.6 Terra (medium) has the lower benchmark cost at $0.496 vs $0.550. GPT-5.6 Terra (medium) is faster at 6.69s vs 9.94s, with pass rates of 79.4% vs 68.3%.

Recommended model: GPT-5.6 Terra (medium) - It has the strongest score in this comparison (7.8) and the best overall balance of cost and response time across all 2 models.

Last updated at: 2026-07-09

Metric Claude Sonnet 5 Claude Sonnet 5 medium Release: 2026-06-30 GPT-5.6 Terra GPT-5.6 Terra medium Release: 2026-07-09
Score 7.9 7.8
Rank #35 #37
Reliability 10.0 10.0
Consistency 9.0 9.2
Tests Correct
Attempt pass rate 79.4% 68.3%
Flaky tests 3 2
Total Runs 63 63
Cost per result 3.662 3.815
Total Cost $0.550 $0.496
Input Price $2.000 / 1M $2.500 / 1M
Output Price $10.000 / 1M $15.000 / 1M
Total Input Tokens 67,416 34,218
Output Tokens 34,012 1,982
Reasoning Tokens 7,673 25,370
Response Time (avg) 9.94s 6.69s
Response Time (max) 56.94s 41.68s
Response Time (total) 208.71s 140.49s

Generation showcase

Hamster playing table tennis

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

#35 Claude Sonnet 5

medium
Cost
$0.007
Time
6.4s
Tokens
832 tok

#37 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

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 5 10.0 10.0 100.0% 0 3.80s 834 1,220 446
GPT-5.6 Terra 8.3 10.0 75.0% 0 2.22s 606 172 657
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 5 9.0 7.9 88.9% 1 17.28s 10,590 13,153 2,379
GPT-5.6 Terra 6.1 7.2 55.6% 1 7.19s 7,302 427 4,527
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 5 4.5 2.1 66.7% 1 37.01s 29,394 4,848 2,170
GPT-5.6 Terra 10.0 10.0 100.0% 0 6.26s 11,019 316 540
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 5 10.0 10.0 100.0% 0 3.16s 10,503 312 0
GPT-5.6 Terra 10.0 10.0 100.0% 0 872ms 7,140 222 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 5 7.7 10.0 66.7% 0 20.38s 975 12,140 1,994
GPT-5.6 Terra 5.3 10.0 33.3% 0 23.45s 723 70 15,327
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 5 4.8 3.2 33.3% 1 4.32s 708 264 0
GPT-5.6 Terra 5.5 10.0 0.0% 0 2.37s 477 133 144
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 5 9.9 10.0 100.0% 0 3.10s 909 318 269
GPT-5.6 Terra 10.0 10.0 100.0% 0 1.43s 660 89 261
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 5 7.7 10.0 66.7% 0 2.98s 894 407 121
GPT-5.6 Terra 8.4 7.4 88.9% 1 3.78s 642 272 1,462
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 5 10.0 10.0 100.0% 0 10.70s 12,351 433 90
GPT-5.6 Terra 10.0 10.0 100.0% 0 5.09s 5,454 254 246
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 5 3.0 10.0 0.0% 0 7.06s 258 917 204
GPT-5.6 Terra 3.0 10.0 0.0% 0 10.05s 195 27 2,206

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