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Mercury 2 (medium) vs GPT-5.6 Sol

GPT-5.6 Sol leads on average score with 6.7 vs 6.6. Mercury 2 (medium) has the lower benchmark cost at $0.121 vs $0.795. Mercury 2 (medium) is faster at 4.40s vs 4.61s, with pass rates of 53.6% vs 60.9%.

Last updated at: 2026-10-24

Compared models

Rank
#226
Total Output Tokens
96,943
Response Time (avg)
4.40s
Total Cost
$0.121
Rank
#219
Total Output Tokens
5,555
Response Time (avg)
4.61s
Total Cost
$0.795
Recommended model Mercury 2 (medium)

Its score stays close to the best score here (6.6 vs 6.7), while costing about 6.6x less than GPT-5.6 Sol.

Detailed comparison

Metric Mercury 2 Mercury 2 medium Release: 2026-02-24 GPT-5.6 Sol GPT-5.6 Sol none Release: 2026-07-09
Score 6.6 6.7
Rank #226 #219
Reliability 10.0 10.0
Consistency 8.1 9.1
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 53.6% 60.9%
Flaky tests 5 3
Total Runs 69 69
Cost per result 1.201 6.619
Total Cost $0.121 $0.795
Input Price $0.250 / 1M $2.000 / 1M
Output Price $0.750 / 1M $10.000 / 1M
Cache Read Price $0.025 / 1M $0.200 / 1M
Cache Write Price N/A $2.500 / 1M
Total Input Tokens 189,300 207,852
Output Tokens 10,854 5,555
Reasoning Tokens 86,089 0
Response Time (avg) 4.40s 4.61s
Response Time (max) 34.92s 58.28s
Response Time (total) 96.81s 105.93s
Parameters ~100B ~2T total (~150B active)
Availability Closed Closed

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Model generation showcase

Hamster playing table tennis

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

#226 Mercury 2

medium
Cost
$0.002
Time
2.1s
Tokens
1,702 tok

#219 GPT-5.6 Sol

none
Cost
$0.116
Time
78.7s
Tokens
3,944 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
Mercury 2 8.2 7.7 77.8% 1 2.04s 7,065 296 11,328
GPT-5.6 Sol 5.5 10.0 33.3% 0 1.39s 7,302 390 0

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