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BEAM Benchmark

BEAM is a benchmark for memory capability over long-context chat cases. Each case contains a very long chat history split into batches; ReMe converts each batch into a session, ingests them in chronological order, then answers probing questions via an agentic (ReAct) mode. Answers are scored with BEAM's rubric-based answer_judge job, which produces both a graded score and a binary verdict, and per-type averages are reported.

BEAM ships dataset variants by chat size — 100K / 500K / 1M / 10M — so memory systems can be stressed at different context lengths. Question types include abstention, contradiction resolution, event ordering, information extraction, instruction following, knowledge update, multi-session reasoning, preference following, summarization, and temporal reasoning.

Install ReMe and the BEAM plugin in editable mode from the repository root:

python -m pip install -e ".[as]"
reme plugins install ./plugins/beam --editable
reme plugins validate beam

The runner explicitly enables the installed beam plugin and combines its defaults with ReMe's built-in benchmark preset. Editable installation keeps changes under plugins/beam visible without reinstalling the plugin. Custom application config paths still work through reme.config and can use extends: benchmark. This directory continues to own the runner, evaluation settings, dataset and outputs. Model credentials use the environment variables declared by the shared benchmark configuration.

1. Get the Dataset

BEAM is a public repository, cloned into benchmark/beam/dataset/:

mkdir -p benchmark/beam/dataset
cd benchmark/beam/dataset
git clone https://github.com/mohammadtavakoli78/BEAM.git

After cloning, benchmark/beam/dataset/BEAM/ should contain chats/, src/, topics/ and other subdirectories.

2. Run

From the repository root:

python benchmark/beam/run.py
python benchmark/beam/run.py --config benchmark/beam/config.yaml
python benchmark/beam/run.py -q                        # quiet
python benchmark/beam/run.py --eval_only               # reuse existing workspaces, query + judge only

3. Pipeline

1. For each case, load chat.json and convert each batch into a ReMe session.
2. Ingest sessions in chronological order into an isolated workspace, then digest_update.
3. Answer each probing question via agentic (ReAct) mode.
4. Score answers with BEAM's rubric-based answer_judge job and print per-type averages.

4. Key config — benchmark/beam/config.yaml

Key	Meaning
dataset.beam_root	BEAM dataset root (benchmark/beam/dataset/BEAM).
dataset.chat_size	Variant to run: 100K / 500K / 1M / 10M.
dataset.case_ids	Specific cases (e.g. ["1","2"]); empty = all cases.
dataset.start_index / num_items	Case pagination (num_items 0 = all).
dataset.workspace_root	Per-case workspace root (benchmark/beam/workspaces/beam).
evaluation.num_workers	0 = auto, 1 = sequential, >1 = parallel.
reme.config	ReMe config used (benchmark).
output.dir	Results directory (benchmark/beam/results).

5. Outputs

Results are JSON files written to output.dir as results_<chat_size>_<timestamp>.json, with a per-type score summary also printed to the console. Logging conventions are shared across benchmarks — see the top-level README.

6. Reference Results

The results below use the longmemeval-version prompt.

100K

agentscope==2.0.4.post1, conda reme env, 20 workers, eval-only (reusing prebuilt memory) (2026-08-05, 20 cases / 400 Qs, total 46.0 min)

Type	Agentic	Binary	input tok/q	output tok/q	total tok/q	tool calls/q
abstention	0.550	0.550	96,031	1,070	97,101	4.58
contradiction_resolution	0.438	0.412	32,263	872	33,135	2.48
event_ordering	0.501	0.423	140,195	5,163	145,358	4.70
information_extraction	0.873	0.832	50,245	883	51,128	3.15
instruction_following	0.750	0.725	37,986	848	38,834	2.67
knowledge_update	0.688	0.675	31,198	651	31,849	2.27
multi_session_reasoning	0.626	0.584	85,038	4,563	89,601	4.28
preference_following	0.925	0.912	34,281	989	35,270	2.50
summarization	0.623	0.461	89,657	2,056	91,713	4.12
temporal_reasoning	0.637	0.625	34,563	1,049	35,612	2.52
OVERALL	0.661	0.620	63,146	1,814	64,960	3.33

Memory Construction average token consumption (default agent, full build over 20 cases):

Agent	input tok/case	output tok/case	total tok/case
default	2,172,316	136,697	2,309,013

1M

agentscope==2.0.4.post1, conda reme env, 20 workers, full memory build (2026-08-05, 35 cases / 700 Qs, total 459.2 min)

Type	Agentic	Binary	input tok/q	output tok/q	total tok/q	tool calls/q
abstention	0.429	0.429	118,707	1,178	119,886	4.20
contradiction_resolution	0.391	0.364	49,787	810	50,597	2.50
event_ordering	0.558	0.456	201,514	3,889	205,403	4.79
information_extraction	0.809	0.772	78,950	894	79,844	3.00
instruction_following	0.852	0.832	55,757	924	56,681	2.81
knowledge_update	0.779	0.771	45,981	665	46,646	2.37
multi_session_reasoning	0.658	0.612	138,133	2,873	141,006	4.40
preference_following	0.798	0.777	51,796	920	52,716	2.53
summarization	0.693	0.537	158,794	2,905	161,700	4.44
temporal_reasoning	0.536	0.536	100,176	3,148	103,324	3.90
OVERALL	0.650	0.609	99,959	1,821	101,780	3.49

Memory Construction average token consumption (default agent, full build over 35 cases):

Agent	input tok/case	output tok/case	total tok/case
default	31,943,817	1,417,061	33,360,878