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.

Price-Performance Score Distribution (Top 20)

Click a model name to view its detail page.

ScoreCostTime
GPT-5.6 Luna70%$0.00201.2s
GPT-4.1 Nano63%$0.00054.6s
GPT-6 Luna70%$0.00022.2s
GPT-5.4 Nano68%$0.00051.5s
Ministral 8B68%$0.00074.4s
Ministral 3 8B78%$0.001317.9s
GPT-5.4 Nano (Reasoning, Low)97%$0.00083.9s
Claude Haiku 5.5 (Adaptive)98%$0.00145.2s
Z.AI GLM 5.3 Flash (Reasoning, Low)96%$0.00037.3s
Inception Mercury 296%$0.00273.8s
GPT-5.4 Mini (Reasoning, Low)95%$0.00344.0s
GPT-5.4 Nano (Reasoning)94%$0.001711.4s
Gemma 4 31B71%$0.000911.7s
Claude Haiku 5.5 (Reasoning, Low)97%$0.00137.1s
ByteDance Seed 1.6 Flash94%$0.00089.1s
Claude Haiku 5.5 (Reasoning, Medium)100%$0.00137.4s
GPT-6.1 Sol (Reasoning, Medium)77%$0.00335.1s
Arcee AI: Trinity Mini73%$0.000926.3s
GPT-5.6 Luna (Reasoning, Medium)92%$0.00484.7s
GPT-6 Luna (Reasoning, Medium)79%$0.000510.2s
0.600.700.800.901.00

Cost vs Performance

Compares total cost for this test against the test score. Quadrant lines are drawn at the median values. Only models with available cost data are shown.

Most Stable Models (Top 20)

Ranked by stability (median × consistency). Click a model name to view its detail page.

ScoreConsistencyStability
Claude Haiku 5.5 (Reasoning, Medium)100%100%100%
Nemotron 3 Super99%83%83%
Claude Haiku 5.5 (Adaptive)98%77%77%
Claude Haiku 5.5 (Reasoning, Low)97%72%72%
o4 Mini High97%72%72%
Muse Spark 1.1 (Reasoning, Minimal)97%72%72%
GPT-5.4 Nano (Reasoning, Low)97%70%70%
Z.AI GLM 5.3 Flash (Reasoning, Low)96%67%67%
o4 Mini96%67%67%
Inception Mercury 296%67%67%
Z.AI GLM 5 Turbo96%65%65%
Claude Opus 5.5 (Reasoning)95%64%64%
GPT-5.195%64%64%
GPT-5.4 Mini (Reasoning, Low)95%64%64%
Muse Spark 1.1 (Reasoning, Medium)95%61%61%
Claude Opus 4.6 (Reasoning)94%60%60%
Grok 4.5 (Reasoning, High)94%60%60%
Muse Spark 1.2 (Reasoning, Medium)95%59%59%
ByteDance Seed 1.6 Flash94%59%59%
Grok 4.5 (Reasoning, Low)94%58%58%
10%20%30%40%50%60%70%80%90%100%

Top Overall Models (Top 20)

Ranked by composite score (performance, cost, speed & stability). Click a model name to view its detail page.

ScoreCostSpeedStability
Claude Haiku 5.5 (Reasoning, Medium)100%$0.00137.4s100%
Claude Haiku 5.5 (Adaptive)98%$0.00145.2s77%
Claude Haiku 5.5 (Reasoning, Low)97%$0.00137.1s72%
GPT-5.4 Nano (Reasoning, Low)97%$0.00083.9s70%
Nemotron 3 Super99%$0.00001.3m83%
Z.AI GLM 5.3 Flash (Reasoning, Low)96%$0.00037.3s67%
Inception Mercury 296%$0.00273.8s67%
Muse Spark 1.1 (Reasoning, Minimal)97%$0.01211.2s72%
GPT-5.4 Mini (Reasoning, Low)95%$0.00344.0s64%
Z.AI GLM 5 Turbo96%$0.007116.0s65%
ByteDance Seed 1.6 Flash94%$0.00089.1s59%
o4 Mini96%$0.01425.0s67%
GPT-5.4 Nano (Reasoning)94%$0.001711.4s57%
Gemini 4 Argon (Reasoning, Medium)93%$0.00834.1s55%
Grok 4.5 (Reasoning, Low)94%$0.01217.0s58%
Z.AI GLM 5.2 (Reasoning, High)94%$0.008125.8s58%
Muse Spark 1.1 (Reasoning, Medium)95%$0.01919.4s61%
GPT-5.6 Luna (Reasoning, Medium)92%$0.00484.7s51%
Laguna XS 2.191%$0.000516.4s52%
o4 Mini High97%$0.02752.5s72%
10%20%30%40%50%60%70%80%90%100%
basic entriesdetailed entries
Model Total ▼Short text (~524 words), small codex (11 entries)Short text (~524 words), big codex (51 entries)Long text (~1594 words), small codex (11 entries)Long text (~1594 words), big codex (51 entries)Short text (~524 words), small codex (11 detailed entries)Short text (~524 words), big codex (51 detailed entries)Long text (~1594 words), small codex (11 detailed entries)Long text (~1594 words), big codex (51 detailed entries)
Claude Haiku 5.5 (Reasoning, Medium)100%100%100%100%100%100%100%100%100%
Nemotron 3 Super99%100%100%100%93%100%100%100%100%
Claude Haiku 5.5 (Adaptive)98%100%100%100%100%93%100%100%93%
Muse Spark 1.1 (Reasoning, Minimal)97%93%85%100%100%100%100%100%100%
o4 Mini High97%93%100%100%85%100%100%100%100%
Claude Haiku 5.5 (Reasoning, Low)97%100%100%100%100%93%100%100%85%
GPT-5.4 Nano (Reasoning, Low)97%100%90%100%100%93%93%100%100%
o4 Mini96%100%100%100%85%93%100%93%100%
Z.AI GLM 5.3 Flash (Reasoning, Low)96%100%93%100%93%93%100%93%100%
Inception Mercury 296%100%100%100%100%85%100%100%85%
Z.AI GLM 5 Turbo96%100%100%100%68%100%100%100%100%
Claude Opus 5.5 (Reasoning)95%100%100%100%100%70%93%100%100%
GPT-5.195%93%93%100%100%93%85%100%100%
GPT-5.4 Mini (Reasoning, Low)95%93%85%100%85%100%100%100%100%
Muse Spark 1.1 (Reasoning, Medium)95%85%100%100%83%100%100%100%92%
1–15 of 202
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basic entries

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

Short text (~524 words), big codex (51 entries)

Long text (~1594 words), small codex (11 entries)

Long text (~1594 words), big codex (51 entries)

detailed entries

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

Short text (~524 words), big codex (51 detailed entries)

Long text (~1594 words), small codex (11 detailed entries)

Long text (~1594 words), big codex (51 detailed entries)