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SWE-bench Evaluation

John Yang • November 6, 2023 (Updated Feb. 4, 2025)

In this tutorial, we will explain how to evaluate models and methods using SWE-bench.

🤖 Creating Predictions

For each task instance of the SWE-bench dataset, given an issue (problem_statement) + codebase (repo + base_commit), your model should attempt to write a diff patch prediction. For full details on the SWE-bench task, please refer to Section 2 of the main paper.

Each prediction must be formatted as follows:

{
    "instance_id": "<Unique task instance ID>",
    "model_patch": "<.patch file content string>",
    "model_name_or_path": "<Model name here (i.e. SWE-Llama-13b)>",
}

Store multiple predictions in a .json file formatted as [<prediction 1>, <prediction 2>,... <prediction n>]. It is not necessary to generate predictions for every task instance.

If you'd like examples, the swe-bench/experiments GitHub repository contains many examples of well formed patches.

🔄 Running Evaluation

Evaluate model predictions on the test split of SWE-bench Lite using the evaluation harness with the following command:

python -m swebench.harness.run_evaluation \
    --dataset_name princeton-nlp/SWE-bench_Lite \
    --predictions_path <path_to_predictions> \
    --max_workers <num_workers> \
    --run_id <run_id>
    # use --predictions_path 'gold' to verify the gold patches
    # use --run_id to name the run, logs will be written to ./logs/run_evaluation/<run_id>
    # use --split to specify which split to evaluate on, usually `dev` or `test`
    # use --modal true to run on Modal

You can run evaluation for the following (dataset_name, split)

  • princeton-nlp/SWE-bench_Lite, test (300 task instances)
  • princeton-nlp/SWE-bench_Verified, test (500)
  • princeton-nlp/SWE-bench, dev (225)
  • princeton-nlp/SWE-bench, test (2294)
  • princeton-nlp/SWE-bench_Multimodal, dev (102)

You cannot run evaluation on the test split of princeton-nlp/SWE-bench_Multimodal using this repository (517 instances). To encourage less intentional climbing of the leaderboard, we have intentionally made specifications for evaluating the test split private. Use sb-cli for SWE-bench Multimodal evaluation.

🌩️ Evaluation with Modal

You can also run evaluations entirely on the cloud using Modal to avoid local setup and resource constraints:

python -m swebench.harness.run_evaluation \
    --predictions_path gold \
    --run_id validate-gold-modal \
    --instance_ids sympy__sympy-20590 \
    --modal true

This will execute the evaluation harness on Modal's cloud infrastructure, eliminating the need for local Docker setup and resource management.

Note

Modal for SWE-bench Multimodal is currently experimental and may not be fully supported yet.