Benchmarks / Long context

Artificial Analysis Long Context Reasoning

AA-LCR

Long-context synthesis and reasoning: 100 open-answer questions requiring models to integrate evidence across long inputs.

What this does not measure
  • Retrieval from external databases — the context is in-prompt only.
  • Multimodal long documents — AA-LCR is text-only in the current AA harness.
  • Infinite context — the eval uses a fixed long-context window, not arbitrary document length.
Analysis

Why this benchmark is useful

Long-context research breaks when models lose thread across distant evidence. AA-LCR is one of the few public suites that grades synthesis across long inputs instead of retrieval trivia alone.

Scope

Coverage map

Task family
Long context
Format
100 open-answer questions with long context passages; equality-checker LLM grading, pass@1.
Scoring
pass@1 accuracy with 3 repeats.
Maintainer
Artificial Analysis
Reading guide

How to read the scores

Read pass@1 with three repeats as a conservative headline. Compare only rows from the same AA harness version and long-context window.

Blind spots

What it does not cover

  • Retrieval from external databases — the context is in-prompt only.
  • Multimodal long documents — AA-LCR is text-only in the current AA harness.
  • Infinite context — the eval uses a fixed long-context window, not arbitrary document length.
Scores

Evidence ledger

184 rows
184184 rows
88.67%best score
184source-checked
1sources
2026-09-28to 2026-06-17
184

api · api

Distribution

Where the rows land

0255075100

Normalized to this benchmark's axis (0–100). Open the table for raw units.

Timeline

Newest receipts

  1. Kimi K388.67% ·
  2. MiMo-V2.6-Pro86.33% ·
  3. Claude Fable 5.185.33% ·
  4. Claude Opus 5.584.67% ·
  5. GPT-5.5 (high)84.33% ·

Scores use this benchmark's own unit and axis, not a universal quality score.

#ModelRelease dateScoreProvenanceTrust
1Kimi K3Moonshot2026-07-1688.67%
2026-09-28
Source-checked
2MiMo-V2.6-ProXiaomi2026-09-2286.33%
2026-09-28
Source-checked
3Claude Fable 5.1Anthropic2026-09-0185.33%
2026-09-28
Source-checked
4Claude Opus 5.5Anthropic2026-09-2284.67%
2026-09-28
Source-checked
5GPT-5.5 (high)OpenAI2026-04-2384.33%
2026-09-28
Source-checked
6DeepSeek V4.1 FlashDeepSeek2026-09-1084%
2026-09-28
Source-checked
7GPT-5.6 SolOpenAI2026-07-0984%
2026-09-28
Source-checked
8GPT-5.6 LunaOpenAI2026-07-0983.67%
2026-09-28
Source-checked
9GPT-6 SolOpenAI2026-09-2283.67%
2026-09-28
Source-checked
10GPT-5.3 Codex (xhigh)OpenAI2026-02-0583.33%
2026-09-28
Source-checked
11GPT-6 LunaOpenAI2026-09-2283.33%
2026-09-28
Source-checked
12Muse GlimmerMeta2026-08-1083.33%
2026-09-28
Source-checked
13GPT-5.5 (medium)OpenAI2026-04-2383%
2026-09-28
Source-checked
14GPT-5.6 TerraOpenAI2026-07-0983%
2026-09-28
Source-checked
15MiniMax M3MiniMax2026-05-3183%
2026-09-28
Source-checked
16Muse Spark 1.3Meta2026-09-0283%
2026-09-28
Source-checked
17GPT-5.2OpenAI2025-12-1182.67%
2026-09-28
Source-checked
18Claude Fable 5Anthropic2026-06-0982.33%
2026-09-28
Source-checked
19GPT-5.2 Codex (xhigh)OpenAI2025-12-1182.33%
2026-09-28
Source-checked
20Claude Opus 5 (Adaptive Reasoning, Medium Effort)Anthropic2026-07-2482%
2026-09-28
Source-checked
21Claude Sonnet 5Anthropic2026-06-3082%
2026-09-28
Source-checked
22Gemini 3.1 Pro PreviewGoogle2026-02-1982%
2026-09-28
Source-checked
23GPT 5.4OpenAI2026-03-0582%
2026-09-28
Source-checked
24Qwen3.8 27BAlibaba2026-08-1482%
2026-09-28
Source-checked
25Gemini 3.7 FlashGoogle2026-08-1381.67%
2026-09-28
Source-checked
26Nex-N2-ProOther2026-06-0281.67%
2026-09-28
Source-checked
27Claude Opus 5 (Adaptive Reasoning, Low Effort)Anthropic2026-07-2481.33%
2026-09-28
Source-checked
28DeepSeek V4 Flash Vision (Reasoning, Max Effort)DeepSeek2026-08-2181.33%
2026-09-28
Source-checked
29Gemini 3.8 FlashGoogle2026-09-0281.33%
2026-09-28
Source-checked
30GPT-5.5 (low)OpenAI2026-04-2381%
2026-09-28
Source-checked
31Kimi K2.6Moonshot2026-04-2081%
2026-09-28
Source-checked
32GPT-6 AstraOpenAI2026-09-0380.67%
2026-09-28
Source-checked
33Qwen3.6 Max PreviewAlibaba2026-04-2080.67%
2026-09-28
Source-checked
34Claude Opus 5 (Adaptive Reasoning, Xhigh Effort)Anthropic2026-07-2480.33%
2026-09-28
Source-checked
35DeepSeek V4 Pro 0813 (Reasoning, Max Effort)DeepSeek2026-08-1380.33%
2026-09-28
Source-checked
36Grok 4.6xAI2026-08-1280.33%
2026-09-28
Source-checked
37Qwen3.8 2.4T A95BAlibaba2026-08-1280.33%
2026-09-28
Source-checked
38Qwen3.8 MaxAlibaba2026-08-0380.33%
2026-09-28
Source-checked
39Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort)Anthropic2026-02-1780%
2026-09-28
Source-checked
40Gemini 3.6 Flash (high)Google2026-07-2180%
2026-09-28
Source-checked
41GLM-5.3-FlashZhipu2026-08-2680%
2026-09-28
Source-checked
42GPT-5.1OpenAI2025-11-1380%
2026-09-28
Source-checked
43K2 Horizon 375B A23BOther2026-09-0380%
2026-09-28
Source-checked
44DeepSeek V4 Flash 0731 (Reasoning, Max Effort)DeepSeek2026-07-3179.67%
2026-09-28
Source-checked
45GLM-5.3Zhipu2026-08-1479.67%
2026-09-28
Source-checked
46MiMo-V2.5-ProXiaomi2026-04-2279.67%
2026-09-28
Source-checked
47Qwen3.8-Flash-NextAlibaba2026-08-2679.67%
2026-09-28
Source-checked
48Apodex 1.1Other2026-08-3079.33%
2026-09-28
Source-checked
49Claude Opus 5 (Adaptive Reasoning, Max Effort)Anthropic2026-07-2479.33%
2026-09-28
Source-checked
50Grok 4.5xAI2026-07-0879.33%
2026-09-28
Source-checked
51Kimi K2.7 CodeMoonshot2026-06-1279.33%
2026-09-28
Source-checked
52Kimi K3 (low)Moonshot2026-07-1679.33%
2026-09-28
Source-checked
53Nemotron 3 Ultra 550B A55B (Reasoning)NVIDIA2026-06-0479.33%
2026-09-28
Source-checked
54Claude Opus 5 (Adaptive Reasoning, High Effort)Anthropic2026-07-2479%
2026-09-28
Source-checked
55Hy3Other2026-07-0679%
2026-09-28
Source-checked
56Muse Spark 1.2Meta2026-08-0579%
2026-09-28
Source-checked
57Qwen3.7 MaxAlibaba2026-05-1979%
2026-09-28
Source-checked
58Claude Opus 4.7Anthropic2026-04-1678.67%
2026-09-28
Source-checked
59GLM-5.2Zhipu2026-06-1378.33%
2026-09-28
Source-checked
60MiniMax M2.7MiniMax2026-04-1578.33%
2026-09-28
Source-checked
61Qwen3.6 PlusAlibaba2026-04-0278.33%
2026-09-28
Source-checked
62GPT-5 (high)OpenAI2025-08-0778.2%
2026-09-28
Source-checked
63Claude Opus 4.6 (Adaptive Reasoning, Max Effort)Anthropic2026-02-0578%
2026-09-28
Source-checked
64Gemini 3 Flash Preview (Reasoning)Google2025-12-1778%
2026-09-28
Source-checked
65Kimi K2.5Moonshot2026-01-2778%
2026-09-28
Source-checked
66Muse SparkOther2026-01-0178%
2026-09-28
Source-checked
67Muse Spark 1.1Meta2026-07-0977.67%
2026-09-28
Source-checked
68Qwen3.5 27B (Reasoning)Alibaba2026-02-2477.67%
2026-09-28
Source-checked
69Claude Opus 4.5 (Reasoning)Anthropic2025-11-2477.33%
2026-09-28
Source-checked
70Inkling (xhigh)Other2026-07-1577.33%
2026-09-28
Source-checked
71Qwen3.5 397B A17B (Reasoning)Alibaba2026-02-1677.33%
2026-09-28
Source-checked
72Qwen3.6 27B (Reasoning)Alibaba2026-04-2277.33%
2026-09-28
Source-checked
73GPT-5.4 MiniOpenAI2026-03-1777%
2026-09-28
Source-checked
74GPT-5.4 (low)OpenAI2026-03-0576.67%
2026-09-28
Source-checked
75GPT-5.4 NanoOpenAI2026-03-1776.67%
2026-09-28
Source-checked
76Grok 4.7xAI2026-09-2176.67%
2026-09-28
Source-checked
77Qwen3.5 122B A10B (Reasoning)Alibaba2026-02-2476.33%
2026-09-28
Source-checked
78Claude 4.1 Opus (Reasoning)Anthropic2025-08-0576%
2026-09-28
Source-checked
79Gemini 3 ProGoogle2025-11-1876%
2026-09-28
Source-checked
80Gemini 3.5 Flash-LiteGoogle2026-07-2176%
2026-09-28
Source-checked
81GPT-5 (medium)OpenAI2025-08-0776%
2026-09-28
Source-checked
82Motif 3Other2026-08-1276%
2026-09-28
Source-checked
83Claude Opus 4.7 (Non-reasoning, High Effort)Anthropic2026-04-1675.67%
2026-09-28
Source-checked
84GLM-5 (Reasoning)Zhipu2026-02-1175.67%
2026-09-28
Source-checked
85Inkling SmallOther2026-07-3075.67%
2026-09-28
Source-checked
86Grok 4.3 (medium)xAI2026-04-3075%
2026-09-28
Source-checked
87MiMo-V2-OmniXiaomi2026-03-1975%
2026-09-28
Source-checked
88Grok Build 0.1 0616xAI2026-06-1674.67%
2026-09-28
Source-checked
89Motif 3 (Beta)Other2026-07-2174.67%
2026-09-28
Source-checked
90OpenAI o3OpenAI2025-04-1674.67%
2026-09-28
Source-checked
91Gemini 3.1 Flash LiteGoogle2026-05-0774.33%
2026-09-28
Source-checked
92Gemini 3.5 Flash (medium)Google2026-05-1974.33%
2026-09-28
Source-checked
93MiMo-V2.6-FlashXiaomi2026-09-2274.33%
2026-09-28
Source-checked
94Qwen3 Max ThinkingAlibaba2026-01-2674.33%
2026-09-28
Source-checked
95Gemini 3 Pro Preview (low)Google2025-11-1874%
2026-09-28
Source-checked
96Grok 4.3 (low)xAI2026-04-3074%
2026-09-28
Source-checked
97Solar Pro 4Other2026-08-0674%
2026-09-28
Source-checked
98GLM-5.1Zhipu2026-04-0773.67%
2026-09-28
Source-checked
99Step 3.7 FlashStepFun2026-06-0173.67%
2026-09-28
Source-checked
100DeepSeek V3.2 (Reasoning)DeepSeek2025-12-0173.33%
2026-09-28
Source-checked
101Gemini 3.5 FlashGoogle2026-05-1973.33%
2026-09-28
Source-checked
102MiMo-V2-Omni-0327Xiaomi2026-03-2773.33%
2026-09-28
Source-checked
103MiniMax M2.5MiniMax2026-04-0173.33%
2026-09-28
Source-checked
104Grok 4.3xAI2026-04-3073%
2026-09-28
Source-checked
105KAT Coder Pro V2Other2026-03-2773%
2026-09-28
Source-checked
106Ling 3.0 FlashOther2026-08-0473%
2026-09-28
Source-checked
107MiMo-V2.5Xiaomi2026-04-2273%
2026-09-28
Source-checked
108Qwen 3.7 PlusAlibaba2026-06-0273%
2026-09-28
Source-checked
109Claude 4.5 Sonnet (Reasoning)Anthropic2025-09-2972.33%
2026-09-28
Source-checked
110Kimi K2 ThinkingMoonshot2025-11-0672%
2026-09-28
Source-checked
111GLM-5-TurboZhipu2026-03-1571.67%
2026-09-28
Source-checked
112GPT-5 Codex (high)OpenAI2025-09-2371.67%
2026-09-28
Source-checked
113Qwen3.6 35B A3B (Reasoning)Alibaba2026-04-1671.67%
2026-09-28
Source-checked
114Solar Open2 250BOther2026-08-1271.67%
2026-09-28
Source-checked
115JT-4.1 Flash 236B A21BOther2026-07-0971.33%
2026-09-28
Source-checked
116MiMo-V2-Flash (Feb 2026)Xiaomi2025-12-1671.33%
2026-09-28
Source-checked
117GLM-4.7 (Reasoning)Zhipu2025-12-2271%
2026-09-28
Source-checked
118Claude Opus 4.5Anthropic2025-11-2470.67%
2026-09-28
Source-checked
119MiMo-V2-Flash (Reasoning)Xiaomi2025-12-1670.67%
2026-09-28
Source-checked
120GLM 5V Turbo (Reasoning)Zhipu2026-04-0170.33%
2026-09-28
Source-checked
121GPT-5.2 (medium)OpenAI2025-12-1170.33%
2026-09-28
Source-checked
122A.X-K2Other2026-08-1270%
2026-09-28
Source-checked
123GPT-5.5 Instant (June 2026)OpenAI2026-06-2570%
2026-09-28
Source-checked
124Ring-2.6-1TOther2026-05-0870%
2026-09-28
Source-checked
125Gemma 4 31B ITGoogle2026-03-0169.67%
2026-09-28
Source-checked
126Kimi K2.6 (Non-reasoning)Other2026-04-2069.67%
2026-09-28
Source-checked
127Claude 4 Opus (Reasoning)Anthropic2025-05-2269.33%
2026-09-28
Source-checked
128Claude Sonnet 4.6 (Non-reasoning, Low Effort)Anthropic2026-02-1769.33%
2026-09-28
Source-checked
129GPT-5.1 Codex (high)OpenAI2025-11-1369.33%
2026-09-28
Source-checked
130Mistral Medium 3.5Mistral2026-04-2969.33%
2026-09-28
Source-checked
131Grok 4.20 ReasoningxAI2026-03-0569%
2026-09-28
Source-checked
132Claude Sonnet 4.6Anthropic2026-02-1768.33%
2026-09-28
Source-checked
133MiMo-V2-ProXiaomi2026-03-1868.33%
2026-09-28
Source-checked
134Grok 4xAI2025-07-1068%
2026-09-28
Source-checked
135Grok 4.20 0309 (Reasoning)xAI2026-03-1067.67%
2026-09-28
Source-checked
136MiniMax-M2.1MiniMax2025-12-2367.67%
2026-09-28
Source-checked
137Claude Opus 4.6Anthropic2026-02-0567%
2026-09-28
Source-checked
138Qwen3.6 27B (Non-reasoning)Alibaba2026-04-2266.67%
2026-09-28
Source-checked
139GPT-5.5 Instant (May 2026)OpenAI2026-05-0566.33%
2026-09-28
Source-checked
140JT-35B-FlashOther2026-05-1465.67%
2026-09-28
Source-checked
141G9v3-39A5BOther2026-08-0365.33%
2026-09-28
Source-checked
142LongCat-2.0Meituan2026-06-2965%
2026-09-28
Source-checked
143OpenAI o1OpenAI2024-09-1265%
2026-09-28
Source-checked
144Hy3-preview (Reasoning)Other2026-04-2364.67%
2026-09-28
Source-checked
145Qwen3.5 397B A17B (Non-reasoning)Alibaba2026-02-1664.33%
2026-09-28
Source-checked
146Qwen3.6 35B A3B (Non-reasoning)Alibaba2026-04-1664.33%
2026-09-28
Source-checked
147GPT-5.5 (Non-reasoning)OpenAI2026-04-2364%
2026-09-28
Source-checked
148Gemma 4 12B (Reasoning)Google2026-06-0763.67%
2026-09-28
Source-checked
149Gemini 3.5 Flash (minimal)Google2026-05-1961.33%
2026-09-28
Source-checked
150Ling 3.0 TinyOther2026-08-0660.33%
2026-09-28
Source-checked
151Nemotron 3.5 LightningNVIDIA2026-08-1160.33%
2026-09-28
Source-checked
152K-EXAONE 2.0 0803Other2026-08-1260%
2026-09-28
Source-checked
153MiniCPM5-2BOpenBMB2026-09-0759.33%
2026-09-28
Source-checked
1Claude Opus 4.8Anthropic2026-05-2858.3%
2026-06-17
Source-checked
155DeepSeek R1DeepSeek2025-01-2055.67%
2026-09-28
Source-checked
156Gemini 3 Flash PreviewGoogle2025-12-1755.33%
2026-09-28
Source-checked
157EXAONE 4.5 33BOther2026-04-0954.67%
2026-09-28
Source-checked
2GPT 5.5OpenAI2026-04-2352.1%
2026-06-17
Source-checked
159Llama 4 MaverickMeta2026-04-0550%
2026-09-28
Source-checked
160Granite 4.2 30BOther2026-08-2549%
2026-09-28
Source-checked
161Granite 4.2 8BOther2026-08-2545%
2026-09-28
Source-checked
162GLM-5 (Non-reasoning)Zhipu2026-02-1143.67%
2026-09-28
Source-checked
163GLM-5.2 (Non-reasoning)Zhipu2026-06-1642.33%
2026-09-28
Source-checked
164Hy3-preview (Non-reasoning)Other2026-04-2342%
2026-09-28
Source-checked
165Ling-2.6-1TOther2026-04-2341.67%
2026-09-28
Source-checked
166MiMo-V2.5-Pro (Non-reasoning)Xiaomi2026-04-2241.67%
2026-09-28
Source-checked
167G9v3-3BOther2026-07-2341.33%
2026-09-28
Source-checked
168Nemotron 3 Nano Omni 30B A3B ReasoningNVIDIA2026-04-2939.67%
2026-09-28
Source-checked
169North Mini CodeCohere2026-06-0937.33%
2026-09-28
Source-checked
170Mistral Large 3Mistral2025-12-0236%
2026-09-28
Source-checked
171Gemma 4 12B (Non-reasoning)Google2026-06-1035%
2026-09-28
Source-checked
172Grok 4.3 (Non-reasoning)xAI2026-04-3032.33%
2026-09-28
Source-checked
173Ling 2.6 FlashOther2026-04-2131.33%
2026-09-28
Source-checked
174Llama 4 ScoutMeta2026-04-0527.7%
2026-09-28
Source-checked
175Granite 4.2 3BOther2026-08-2524.33%
2026-09-28
Source-checked
176Granite 4.1 30BOther2026-04-2923.67%
2026-09-28
Source-checked
177Grok 4.20 0309 v2 (Non-reasoning)xAI2026-04-0723.33%
2026-09-28
Source-checked
178Command ACohere2026-03-1521.33%
2026-09-28
Source-checked
179DiffusionGemma 26B A4BGoogle2026-06-1019.67%
2026-09-28
Source-checked
180JT-MINIOther2026-04-1513%
2026-09-28
Source-checked
181MiniCPM-V 4.6 1.3BOpenBMB2026-05-117%
2026-09-28
Source-checked
182MiniCPM5-1B (Reasoning)OpenBMB2026-06-046%
2026-09-28
Source-checked
183MiniCPM5-1B (Non-reasoning)OpenBMB2026-05-255%
2026-09-28
Source-checked
184LFM2.5-8B-A1BLiquid2026-06-080%
2026-09-28
Source-checked
Method

What it covers

This benchmark sits in the long context family. It uses 100 open-answer questions with long context passages; equality-checker LLM grading, pass@1. The score should travel with its task format, scoring method, source date, and benchmark version.

Score ceiling

Where it breaks down

High scores on in-prompt long context do not prove reliable retrieval from external corpora or multimodal documents.

Receipts

Sources and further reading

Questions about this benchmark

Every answer below is assembled from the dated fields on this page. Nothing is written separately for search.

What does AA-LCR measure?

Long-context synthesis and reasoning: 100 open-answer questions requiring models to integrate evidence across long inputs.

What does a high AA-LCR score not prove?

A strong AA-LCR result says nothing about:

  • Retrieval from external databases — the context is in-prompt only.
  • Multimodal long documents — AA-LCR is text-only in the current AA harness.
  • Infinite context — the eval uses a fixed long-context window, not arbitrary document length.

How is AA-LCR scored?

pass@1 accuracy with 3 repeats. Task format: 100 open-answer questions with long context passages; equality-checker LLM grading, pass@1.

Is AA-LCR saturated?

AA-LCR is currently marked Active in the atlas.

Can AA-LCR results be contaminated by training data?

Contamination risk for AA-LCR is graded Low contamination. Treat every row on this page as a public claim with a source and a date, not as a controlled experiment.

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