Short text (~524 words), small codex (11 entries)

Codex Red Herring (False Positive Detection)

Tests whether models correctly report "no violations" when a codex is fully consistent with the prose passage. Models that hallucinate false violations (false positives) fail. Uses a 2×2 matrix of text length × codex size, with bare and detailed-entry variants.

Hallucination

Performance Score Distribution (Top 20)

Click a model name to view its detail page.

	Score
Claude Opus 4.6 (Reasoning)	100%
Gemini 3.1 Pro (Preview)	100%
Z.AI GLM 5 Turbo	100%
GPT-5 Mini	100%
Claude Opus 4.6	100%
Grok 4.20 (Beta, Reasoning)	100%
ByteDance Seed 1.6	100%
GPT-5.4 Mini (Reasoning)	100%
Grok 4.1 Fast	100%
MiniMax M2.7	100%
o4 Mini	100%
Gemini 2.5 Flash (Reasoning)	100%
Z.AI GLM 4.7 Flash	100%
Nemotron 3 Super	100%
Inception Mercury 2	100%
Mistral Small 4 (Reasoning)	100%
GPT-5.4 Nano (Reasoning)	100%
Inception Mercury	100%
GPT-5.4 Nano (Reasoning, Low)	100%
ByteDance Seed 1.6 Flash	100%

	Score	Cost	Time
LFM2 24B	100%	$0.0000	1.3s
GPT-5.4 Nano	80%	$0.0003	1.0s
GPT-5.4 Nano (Reasoning, Low)	100%	$0.0005	2.8s
Inception Mercury	100%	$0.0001	3.6s
Arcee AI: Trinity Mini	81%	$0.0012	36.6s
GPT-5.4 Nano (Reasoning)	100%	$0.0008	3.9s
Inception Mercury 2	100%	$0.0013	2.0s
ByteDance Seed 1.6 Flash	100%	$0.0004	5.3s
Grok 4 Fast	77%	$0.0008	8.7s
Gemini 2.5 Flash Lite (Reasoning)	93%	$0.0012	8.6s
GPT-5.4 Mini (Reasoning, Low)	93%	$0.0019	3.6s
Grok 4.1 Fast	100%	$0.0007	7.5s
Llama 3.1 Nemotron 70B	67%	$0.0021	9.0s
Mistral Small 4 (Reasoning)	100%	$0.0009	9.3s
Qwen 3 32B	78%	$0.0004	12.3s
Cohere Command R+ (Aug. 2024)	65%	$0.0046	2.5s
MiniMax M2.5	93%	$0.0015	12.4s
GPT-5.4 Mini (Reasoning)	100%	$0.0039	9.0s
ByteDance Seed 1.6	100%	$0.0017	16.9s
Gemini 2.5 Flash (Reasoning)	100%	$0.0051	8.5s

Rank	Model	Avg. Cost	Avg. Time	Stability	# 1	# 2	# 3	# 4	# 5	# 6	# 7	# 8	# 9	# 10	Total
20	Claude Opus 4.6 (Reasoning)	$0.033	20.7s	100%	100	100	100	100	100	100	100	100	100	100	100%
21	Gemini 3.1 Pro (Preview)	$0.039	27.8s	100%	100	100	100	100	100	100	100	100	100	100	100%
10	Z.AI GLM 5 Turbo	$0.0036	9.8s	100%	100	100	100	100	100	100	100	100	100	100	100%
14	GPT-5 Mini	$0.0044	29.1s	100%	100	100	100	100	100	100	100	100	100	100	100%
19	Claude Opus 4.6	$0.022	9.7s	100%	100	100	100	100	100	100	100	100	100	100	100%
17	Grok 4.20 (Beta, Reasoning)	$0.016	11.8s	100%	100	100	100	100	100	100	100	100	100	100	100%
12	ByteDance Seed 1.6	$0.0017	16.9s	100%	100	100	100	100	100	100	100	100	100	100	100%
9	GPT-5.4 Mini (Reasoning)	$0.0039	9.0s	100%	100	100	100	100	100	100	100	100	100	100	100%
7	Grok 4.1 Fast	$0.0007	7.5s	100%	100	100	100	100	100	100	100	100	100	100	100%
13	MiniMax M2.7	$0.0014	22.4s	100%	100	100	100	100	100	100	100	100	100	100	100%
15	o4 Mini	$0.0097	18.9s	100%	100	100	100	100	100	100	100	100	100	100	100%
11	Gemini 2.5 Flash (Reasoning)	$0.0051	8.5s	100%	100	100	100	100	100	100	100	100	100	100	100%
18	Z.AI GLM 4.7 Flash	$0.0012	47.1s	100%	100	100	100	100	100	100	100	100	100	100	100%
16	Nemotron 3 Super	$0.0000	47.1s	100%	100	100	100	100	100	100	100	100	100	100	100%
4	Inception Mercury 2	$0.0013	2.0s	100%	100	100	100	100	100	100	100	100	100	100	100%
8	Mistral Small 4 (Reasoning)	$0.0009	9.3s	100%	100	100	100	100	100	100	100	100	100	100	100%
5	GPT-5.4 Nano (Reasoning)	$0.0008	3.9s	100%	100	100	100	100	100	100	100	100	100	100	100%
2	Inception Mercury	$0.0001	3.6s	100%	100	100	100	100	100	100	100	100	100	100	100%
3	GPT-5.4 Nano (Reasoning, Low)	$0.0005	2.8s	100%	100	100	100	100	100	100	100	100	100	100	100%
6	ByteDance Seed 1.6 Flash	$0.0004	5.3s	100%	100	100	100	100	100	100	100	100	100	100	100%
1	LFM2 24B	$0.0000	1.3s	100%	100	100	100	100	100	100	100	100	100	100	100%
25	Z.AI GLM 4.6	$0.0029	18.0s	56%	100	100	100	100	100	100	100	100	100	27	93%
26	GPT-5.1	$0.018	22.3s	55%	100	100	100	100	100	100	100	100	100	25	93%
30	Z.AI GLM 5	$0.013	1.4m	55%	100	100	100	100	100	100	100	100	100	25	93%
27	o4 Mini High	$0.019	35.0s	55%	100	100	100	100	100	100	100	100	100	25	93%
24	MiniMax M2.5	$0.0015	12.4s	55%	100	100	100	100	100	100	100	100	100	25	93%
31	ByteDance Seed 2.0 Mini	$0.0018	1.8m	55%	100	100	100	100	100	100	100	100	100	25	93%
22	GPT-5.4 Mini (Reasoning, Low)	$0.0019	3.6s	55%	100	100	100	100	100	100	100	100	100	25	93%
23	Gemini 2.5 Flash Lite (Reasoning)	$0.0012	8.6s	55%	100	100	100	100	100	100	100	100	100	25	93%
29	Nemotron 3 Nano	$0.0016	1.7m	55%	100	100	100	100	100	100	100	100	100	25	93%
52	Claude Sonnet 4.6 (Reasoning)	$0.060	54.9s	40%	100	100	100	100	100	100	100	100	25	25	85%
55	Qwen 3.5 27B	$0.028	2.3m	40%	100	100	100	100	100	100	100	100	25	25	85%
35	GPT-5 Nano	$0.0036	1.2m	40%	100	100	100	100	100	100	100	100	25	25	85%
37	Arcee AI: Trinity Mini	$0.0012	36.6s	22%	100	100	100	100	100	100	100	100	6	0	81%
28	GPT-5.4 Nano	$0.0003	1.0s	38%	100	100	100	100	100	100	100	50	25	25	80%
33	Z.AI GLM 4.5	$0.0018	13.0s	32%	100	100	100	100	100	100	100	29	25	25	78%
39	Aion 2.0	$0.0054	59.6s	31%	100	100	100	100	100	100	100	25	25	25	78%
112	Gemini 3 Pro (Preview)	$0.114	1.4m	31%	100	100	100	100	100	100	100	25	25	25	78%
32	Qwen 3 32B	$0.0004	12.3s	31%	100	100	100	100	100	100	100	25	25	25	78%
34	Grok 4 Fast	$0.0008	8.7s	29%	100	100	100	100	100	100	100	25	25	17	77%
36	GPT-5.2	$0.0091	10.8s	27%	100	100	100	100	100	100	100	25	25	13	76%
116	Qwen 3.5 122B	$0.086	3.8m	27%	100	100	100	100	100	100	25	25	25	25	70%
41	Llama 3.1 Nemotron 70B	$0.0021	9.0s	18%	100	100	100	100	100	100	31	29	7	4	67%
101	Qwen 3.5 9B	$0.0025	3.4m	21%	100	100	100	100	50	50	50	50	50	17	67%
42	Cohere Command R+ (Aug. 2024)	$0.0046	2.5s	14%	100	100	100	100	100	100	25	10	8	8	65%
105	Gemini 2.5 Pro	$0.072	54.5s	21%	100	100	100	100	100	50	25	25	25	25	65%
40	GPT-4.1 Nano	$0.0003	3.7s	18%	100	100	100	100	100	31	29	28	27	26	64%
115	Qwen 3.5 397B A17B	$0.022	4.2m	14%	100	100	100	100	100	25	25	25	25	17	62%
81	Gemini 3 Flash (Preview, Reasoning)	$0.030	54.0s	14%	100	100	100	100	100	25	25	25	25	17	62%
44	GPT-5.4 (Reasoning, Low)	$0.0085	7.6s	13%	100	100	100	100	100	25	25	25	17	17	61%
38	Claude Haiku 4.5	$0.0029	3.2s	30%	100	100	50	50	50	50	50	50	50	50	60%
54	Llama 3.1 70B	$0.0032	38.5s	11%	100	100	100	100	100	35	30	17	5	4	59%
111	Grok 4	$0.060	1.6m	11%	100	100	100	100	100	25	17	17	17	13	59%
43	Qwen 2.5 72B	$0.0003	5.9s	11%	100	100	100	100	42	33	32	29	25	17	58%
46	Claude Sonnet 4	$0.0056	2.1s	10%	100	100	100	100	50	25	25	25	25	17	57%
45	GPT-4.1 Mini	$0.0009	3.8s	9%	100	100	100	100	35	33	31	31	30	7	57%
51	Stealth: Healer Alpha	$0.0000	19.2s	7%	100	100	100	100	25	25	25	25	25	25	55%
58	Hermes 3 405B	$0.0016	2.9s	3%	100	100	100	100	17	17	17	17	13	8	49%
47	Hermes 3 70B	$0.0005	5.9s	11%	100	100	100	50	42	38	33	13	7	5	49%
49	Grok 4.20 (Beta)	$0.0015	904ms	9%	100	100	100	42	35	25	25	25	17	17	49%
110	Z.AI GLM 4.7	$0.014	2.0m	8%	100	100	100	25	25	25	25	25	25	25	48%
71	Claude 3.5 Sonnet	$0.014	5.7s	8%	100	100	100	42	38	25	17	13	13	10	46%
56	GPT-4.1	$0.0028	2.1s	12%	100	100	42	42	38	25	17	17	17	17	41%
113	GPT-5	$0.048	1.6m	10%	100	100	25	25	25	25	25	25	25	25	40%
86	Stealth: Hunter Alpha	$0.0000	1.0m	10%	100	100	25	25	25	25	25	25	25	25	40%
67	Claude Sonnet 4.5	$0.0069	3.5s	10%	100	100	42	25	25	25	25	25	17	17	40%
78	Rocinante 12B	$0.0005	11.7s	2%	100	100	100	50	10	10	10	6	5	4	39%
60	DeepSeek-V2 Chat	$0.0006	2.5s	10%	100	100	25	25	25	25	25	25	25	17	39%
61	GPT-5.4 Mini	$0.0007	3.4s	10%	100	100	25	25	25	25	25	25	25	17	39%
53	Claude Sonnet 4.6	$0.0099	6.2s	30%	42	38	38	38	38	35	35	35	35	8	34%
50	Ministral 3 14B	$0.0004	5.3s	24%	50	50	30	30	30	29	29	29	29	28	33%
109	Qwen 3.5 35B	$0.023	1.2m	14%	100	25	25	25	25	25	25	25	25	25	33%
48	Mistral Medium 3.1	$0.0011	2.8s	27%	42	42	42	35	32	31	30	30	25	17	32%
66	DeepSeek V3 (2024-12-26)	$0.0006	3.5s	14%	100	28	25	25	25	25	25	25	25	17	32%
69	GPT-5.4	$0.0026	1.7s	14%	100	25	25	25	25	25	25	25	25	17	32%
73	GPT-4o, Aug. 6th (temp=1)	$0.0044	2.5s	13%	100	38	35	35	35	17	17	13	13	10	31%
99	GPT-5.4 (Reasoning)	$0.022	36.4s	13%	100	25	25	25	25	25	17	17	17	17	29%
107	Arcee AI: Trinity Large (Preview)	$0.0000	1.8m	13%	100	35	29	29	29	28	28	6	3	0	29%
57	Ministral 3B	$0.0001	3.5s	23%	50	30	30	29	28	28	28	28	27	8	29%
59	Ministral 3 3B	$0.0002	3.4s	24%	31	31	29	29	29	29	29	28	27	3	26%
62	Mistral Large 3	$0.0015	8.4s	25%	32	32	32	31	31	31	31	30	6	6	26%
77	DeepSeek V3.2	$0.0006	22.6s	21%	50	29	29	28	28	25	25	17	17	7	25%
85	GPT-4o Mini (temp=1)	$0.0003	3.7s	6%	100	33	32	31	13	13	10	8	7	7	25%
80	WizardLM 2 8x22b	$0.0011	26.8s	18%	50	50	33	25	25	25	17	13	8	6	25%
114	MoonshotAI: Kimi K2.5	$0.016	2.9m	25%	25	25	25	25	25	25	25	25	25	25	25%
72	Claude Opus 4.5	$0.0099	3.0s	25%	25	25	25	25	25	25	25	25	25	25	25%
95	Qwen 3.5 Flash	$0.0046	1.4m	25%	25	25	25	25	25	25	25	25	25	25	25%
87	ByteDance Seed 2.0 Lite	$0.0047	51.0s	25%	25	25	25	25	25	25	25	25	25	25	25%
64	Ministral 8B	$0.0003	7.2s	23%	28	28	28	27	27	27	27	27	26	2	25%
63	Mistral Small Creative	$0.0004	4.0s	24%	30	30	29	29	29	29	28	28	7	6	24%
74	Writer: Palmyra X5	$0.0025	12.5s	22%	29	28	25	25	25	25	25	17	17	13	23%
75	Mistral Large 2	$0.0059	7.8s	23%	35	33	31	31	31	30	10	10	8	7	23%
68	DeepSeek V3 (2025-03-24)	$0.0005	5.7s	23%	25	25	25	25	25	25	25	17	17	17	23%
65	Gemini 2.5 Flash	$0.0006	875ms	23%	25	25	25	25	25	25	25	17	17	17	23%
76	Mistral Large	$0.0059	7.7s	23%	33	32	32	31	31	30	10	10	8	6	22%
70	GPT-4o, Aug. 6th (temp=0)	$0.0032	1.3s	23%	25	25	25	25	25	25	25	17	17	13	22%
90	GPT-4o, May 13th (temp=1)	$0.010	1.9s	13%	42	35	31	17	17	17	17	13	13	8	21%
79	Qwen3 235B A22B Instruct 2507	$0.0002	4.6s	15%	30	25	25	25	17	17	17	17	17	17	20%
108	Qwen 3.5 Plus (2026-02-15)	$0.010	1.1m	13%	50	32	25	25	25	10	10	10	8	5	20%
88	Claude 3 Haiku	$0.0008	2.9s	8%	38	38	35	33	13	10	8	7	7	6	19%
104	Ministral 3 8B	$0.0022	1.4m	20%	28	28	28	27	27	27	26	2	0	0	19%
89	GPT-4o Mini (temp=0)	$0.0003	3.8s	8%	35	35	35	31	10	10	10	8	8	8	19%
106	Claude Opus 4	$0.034	5.8s	15%	25	25	25	17	17	17	17	17	13	13	18%
91	Claude 3.7 Sonnet	$0.0073	3.4s	12%	42	25	17	17	17	13	13	13	13	13	18%
82	DeepSeek V3.1	$0.0006	9.2s	17%	29	25	25	25	25	17	10	8	7	6	18%
84	Gemini 3 Flash (Preview)	$0.0012	1.6s	16%	25	17	17	17	17	17	17	17	13	13	17%
83	Gemini 3.1 Flash Lite (Preview)	$0.0007	1.2s	15%	25	25	17	17	17	17	13	13	13	13	17%
93	Mistral Small 4	$0.0005	4.8s	6%	30	29	28	28	8	7	6	6	5	5	15%
92	GPT-4o, May 13th (temp=0)	$0.0097	1.8s	14%	17	17	17	17	17	13	13	13	13	10	14%
102	Llama 3.1 8B	$0.0001	20.2s	4%	32	30	29	6	5	5	5	4	4	2	12%
94	Gemini 2.5 Flash Lite	$0.0003	1.1s	9%	17	17	13	10	10	10	6	6	4	3	9%
96	Gemma 3 27B	$0.0002	8.7s	8%	13	10	10	8	8	8	7	6	6	6	8%
98	Mistral Small 3.2 24B	$0.0003	2.6s	5%	10	10	7	6	6	6	5	4	4	4	6%
100	Gemma 3 4B	$0.0001	4.8s	5%	7	7	7	6	6	6	6	6	6	4	6%
97	Mistral NeMO	$0.0003	2.8s	6%	8	7	7	7	6	6	5	5	4	3	6%
103	Gemma 3 12B	$0.0002	10.5s	5%	7	6	6	5	5	5	5	5	4	3	5%
54.57%

Median	Evaluator	Top 3	Flop 3
45.0%	Correct "no violations" response	100Claude Opus 4.6 (Reasoning) 100Gemini 2.5 Flash (Reasoning) 100Grok 4.1 Fast	0GPT-4o, Aug. 6th (temp=0) 0Claude Opus 4 0DeepSeek V3 (2025-03-24)
58.1%	No hallucinated violations	100Z.AI GLM 4.7 Flash 100GPT-5.4 Nano (Reasoning, Low) 100Claude Opus 4.6 (Reasoning)	3Ministral 3 8B 4Ministral 8B 8Ministral 3 3B

Codex Red Herring (False Positive Detection)

Short text (~524 words), small codex (11 entries)

Performance Score Distribution (Top 20)

Price-Performance Score Distribution (Top 20)

Most Stable Models (Top 20)

Top Overall Models (Top 20)