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Anthropic: Claude Sonnet 4.6 vs Inception: Mercury 2

Last updated at: 2026-06-04

Metric Claude Sonnet 4.6 Claude Sonnet 4.6 none Release: 2026-02-17 Mercury 2 Mercury 2 medium Release: 2026-02-24
Score 6.8 6.6
Rank #77 #81
Reliability 10.0 10.0
Consistency 9.7 8.8
Tests Correct
Attempt pass rate 55.6% 54.0%
Flaky tests 1 3
Total Runs 63 63
Cost per result 2.870 0.578
Total Cost $0.316 $0.058
Input Price $3.000 / 1M $0.250 / 1M
Output Price $15.000 / 1M $0.750 / 1M
Total Input Tokens 57,886 35,116
Output Tokens 9,465 4,048
Reasoning Tokens 0 61,219
Response Time (avg) 5.04s 2.24s
Response Time (max) 23.84s 14.63s
Response Time (total) 70.60s 44.72s

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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 4.6 4.8 10.0 25.0% 0 2.94s 636 1,214 0
Mercury 2 6.9 9.9 50.0% 0 1.12s 554 2,546 2,609
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 4.6 5.5 10.0 33.3% 0 5.19s 8,522 2,127 0
Mercury 2 8.2 7.7 77.8% 1 2.04s 7,065 296 11,328
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 4.6 9.5 10.0 100.0% 0 23.84s 26,024 3,766 0
Mercury 2 10.0 10.0 100.0% 0 3.28s 12,909 268 4,887
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 4.6 10.0 10.0 100.0% 0 3.43s 8,574 252 0
Mercury 2 7.3 5.9 83.3% 1 1.11s 6,234 183 1,656
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 4.6 7.7 10.0 66.7% 0 3.54s 759 413 0
Mercury 2 2.9 7.2 11.1% 1 6.48s 695 41 30,754
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 4.6 6.1 3.1 66.7% 1 2.56s 513 192 0
Mercury 2 4.8 10.0 0.0% 0 821ms 456 137 542
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 4.6 6.5 10.0 50.0% 0 1.96s 690 90 0
Mercury 2 10.0 10.0 100.0% 0 1.07s 340 14 958
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 4.6 7.7 10.0 66.7% 0 2.53s 663 533 0
Mercury 2 5.4 10.0 33.3% 0 949ms 601 361 2,781
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 4.6 10.0 10.0 100.0% 0 4.11s 11,301 447 0
Mercury 2 10.0 10.0 100.0% 0 1.89s 6,080 180 1,956
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 4.6 3.0 10.0 0.0% 0 4.67s 204 431 0
Mercury 2 3.0 10.0 0.0% 0 2.58s 182 22 3,748

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