Mercury 2 (medium) vs Grok 4.20 (medium)

Recommended model Mercury 2 (medium)

It has the best score here (7.0), while costing about 8.6x less than Grok 4.20 (medium).

Detailed comparison

Metric	Mercury 2 Mercury 2 medium Release: 2026-02-24	Grok 4.20 Grok 4.20 medium Release: 2026-03-31

Metric	Mercury 2 Mercury 2 medium Release: 2026-02-24	Grok 4.20 Grok 4.20 medium Release: 2026-03-31
Score	7.0	7.0
Rank	#131	#132
Reliability	10.0	10.0
Consistency	8.4	8.2
Attempts	66/66	66/66
Tests Correct
Attempt pass rate	53.0%	60.6%
Flaky tests	4	5
Total Runs	66	66
Cost per result	0.933	10.365
Total Cost	$0.094	$0.805
Input Price	$0.250 / 1M	$1.250 / 1M
Output Price	$0.750 / 1M	$2.500 / 1M
Total Input Tokens	110,515	102,986
Output Tokens	10,325	5,860
Reasoning Tokens	77,229	264,399
Response Time (avg)	2.95s	32.56s
Response Time (max)	14.63s	199.66s
Response Time (total)	61.89s	716.36s
Parameters	~100B	~1T total (~100B active)
Availability	Closed	Closed

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

medium

medium

Category:

Anti-AI Tricks	Score	Consistency	Attempt pass rate	Flaky tests	Tests Correct	Response Time (avg)	Input Tokens	Output Tokens	Reasoning Tokens
Mercury 2	6.9	9.9	50.0%	0		1.12s	554	2,546	2,609
Grok 4.20	8.2	7.9	83.3%	1		3.95s	2,010	287	8,312

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
Grok 4.20	6.3	6.6	55.6%	1		109.93s	8,307	268	103,150

Combined	Score	Consistency	Attempt pass rate	Flaky tests	Tests Correct	Response Time (avg)	Input Tokens	Output Tokens	Reasoning Tokens
Mercury 2	6.7	9.1	50.0%	0		7.84s	87,365	6,533	20,474
Grok 4.20	8.7	6.9	83.3%	1		42.25s	71,267	3,776	44,009

Data parsing and extraction	Score	Consistency	Attempt pass rate	Flaky tests	Tests Correct	Response Time (avg)	Input Tokens	Output Tokens	Reasoning Tokens
Mercury 2	7.3	5.9	83.3%	1		1.11s	6,234	183	1,656
Grok 4.20	10.0	10.0	100.0%	0		4.17s	7,761	180	5,333

Domain specific	Score	Consistency	Attempt pass rate	Flaky tests	Tests Correct	Response Time (avg)	Input Tokens	Output Tokens	Reasoning Tokens
Mercury 2	2.9	4.4	22.2%	2		8.06s	1,638	53	31,177
Grok 4.20	2.9	7.2	11.1%	1		49.71s	1,959	872	59,761

General Intelligence	Score	Consistency	Attempt pass rate	Flaky tests	Tests Correct	Response Time (avg)	Input Tokens	Output Tokens	Reasoning Tokens
Mercury 2	4.8	10.0	0.0%	0		821ms	456	137	542
Grok 4.20	3.9	2.6	33.3%	1		24.48s	825	65	6,440

Instructions following	Score	Consistency	Attempt pass rate	Flaky tests	Tests Correct	Response Time (avg)	Input Tokens	Output Tokens	Reasoning Tokens
Mercury 2	10.0	10.0	100.0%	0		1.07s	340	14	958
Grok 4.20	9.8	10.0	100.0%	0		4.26s	1,362	57	6,419

Puzzle Solving	Score	Consistency	Attempt pass rate	Flaky tests	Tests Correct	Response Time (avg)	Input Tokens	Output Tokens	Reasoning Tokens
Mercury 2	5.4	10.0	33.3%	0		949ms	601	361	2,781
Grok 4.20	7.7	10.0	66.7%	0		6.22s	1,689	149	7,913

Tool Calling	Score	Consistency	Attempt pass rate	Flaky tests	Tests Correct	Response Time (avg)	Input Tokens	Output Tokens	Reasoning Tokens
Mercury 2	10.0	10.0	100.0%	0		1.89s	6,080	180	1,956
Grok 4.20	3.0	10.0	0.0%	0		13.68s	7,275	197	6,620

Trivia	Score	Consistency	Attempt pass rate	Flaky tests	Tests Correct	Response Time (avg)	Input Tokens	Output Tokens	Reasoning Tokens
Mercury 2	3.0	10.0	0.0%	0		2.58s	182	22	3,748
Grok 4.20	3.0	10.0	0.0%	0		63.48s	531	9	16,442

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