{
  "dataset": "swebench-verified-longitudinal",
  "schema_version": "yylo_seo_longitudinal_dataset.v1",
  "dataset_version": 1,
  "description": "Bounded longitudinal extract of the public SWE-bench Verified coding-agent leaderboard: one dated entry per evaluated system on one fixed, human-validated 500-instance task set, republished for citation and analysis with its limitations.",
  "publisher": "yylo.dev",
  "canonical_url": "https://yylo.dev/guides/longitudinal-coding-agent-benchmark-dataset",
  "download_url": "https://yylo.dev/data/swebench-verified-longitudinal-v1.json",
  "source": {
    "surface": "https://www.swebench.com/",
    "board": "Verified",
    "board_description": "A human-validated subset of 500 SWE-bench instances for reliable evaluation of coding agents and language models.",
    "payload": "embedded application/json leaderboard document in the fetched page",
    "fetched_at": "2026-08-29",
    "surface_last_modified": "2026-08-10",
    "source_document_sha256": "sha256:c9043b06f15c37becc1bcfa1d42b509a4439762f675eadab43e6bef40adace98"
  },
  "population": {
    "entries": 180,
    "first_entry_date": "2023-10-10",
    "last_entry_date": "2026-02-26",
    "order": "as published: resolved_percent descending, ties in published order"
  },
  "field_notes": {
    "entry": "leaderboard display name of the evaluated system, as published",
    "entry_date": "entry date on the leaderboard (ISO); the run precedes the listing",
    "source_folder": "the entry's folder identifier on the source surface; unique within this extract and stable mapping back to the source materials",
    "agent": "agent/scaffold name as published",
    "agent_org": "submitting organization as published; null when the source carries none",
    "model": "display name of the model (or ensemble label) as published",
    "model_org": "model organization as published; null when the source carries none",
    "models": "raw model identifiers extracted from the entry's `Model:` tags; more than one member means an ensemble or multi-model pipeline; empty when the source carries no model tag (the display name then carries the identity, e.g. Undisclosed)",
    "model_release_date": "model release date as published, normalized from YYYYMMDD to ISO; null when the source carries none",
    "open_source_system": "the source marks the agent system as open source",
    "open_source_model": "the source marks the model as open source",
    "resolved_percent": "percent of the 500 instances resolved, republished exactly as published",
    "attempts": "attempt policy tag extracted from the entry's `System:` tag: `1`, `2`, or `2+`",
    "verified": "the source's `checked` marker normalized to boolean; null when the source carries none",
    "verified_note": "verbatim source marker when the source states verification in note form (verified stays false)",
    "total_cost_usd": "total reported run cost in USD as published; null when not reported",
    "mean_cost_per_instance_usd": "mean cost per instance in USD as published; null when not reported",
    "mean_api_calls_per_instance": "mean API calls per instance as published; null when not reported",
    "agent_version": "mini-SWE-agent release for the board's frozen-scaffold runs; null for all other systems",
    "reasoning_effort": "declared reasoning effort when the source carries one; null otherwise",
    "system_url": "submitter's system page(s) when the source carries them — occasionally several for one entry; null otherwise"
  },
  "rights_note": "The underlying entries belong to their submitters and the SWE-bench team; this bounded extract exists for citation and analysis with attribution to the source surface, and it is not a YYLO measurement.",
  "entries_sha256": "sha256:cbd2393a235c0276211fb4d7035c943ef7eb7e4be4902be99a5733f6380d02b6",
  "entries": [
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      "entry": "live-SWE-agent + Claude 4.5 Opus medium (20251101)",
      "entry_date": "2025-12-15",
      "source_folder": "20251215_livesweagent_claude-opus-4-5",
      "agent": "live-SWE-agent",
      "agent_org": "UIUC",
      "model": "Claude 4.5 Opus",
      "model_org": "Anthropic",
      "models": [
        "claude-opus-4-5-20251101"
      ],
      "model_release_date": null,
      "open_source_system": true,
      "open_source_model": false,
      "resolved_percent": 79.2,
      "attempts": "1",
      "verified": false,
      "verified_note": null,
      "total_cost_usd": null,
      "mean_cost_per_instance_usd": null,
      "mean_api_calls_per_instance": null,
      "agent_version": null,
      "reasoning_effort": "medium",
      "system_url": "https://github.com/OpenAutoCoder/live-swe-agent"
    },
    {
      "entry": "Sonar Foundation Agent + Claude 4.5 Opus",
      "entry_date": "2025-12-05",
      "source_folder": "20251205_sonar-foundation-agent_claude-opus-4-5",
      "agent": "Sonar Foundation Agent",
      "agent_org": "Sonar",
      "model": "Claude 4.5 Opus",
      "model_org": "Anthropic",
      "models": [
        "claude-opus-4-5"
      ],
      "model_release_date": null,
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      "open_source_model": false,
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      "attempts": "1",
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      "verified_note": null,
      "total_cost_usd": null,
      "mean_cost_per_instance_usd": null,
      "mean_api_calls_per_instance": null,
      "agent_version": null,
      "reasoning_effort": null,
      "system_url": "https://www.sonarsource.com"
    },
    {
      "entry": "TRAE + Doubao-Seed-Code",
      "entry_date": "2025-09-28",
      "source_folder": "20250928_trae_doubao_seed_code",
      "agent": "TRAE",
      "agent_org": "ByteDance",
      "model": "Doubao-Seed-Code",
      "model_org": "ByteDance",
      "models": [
        "Doubao-Seed-Code",
        "Doubao-Seed-1.6"
      ],
      "model_release_date": null,
      "open_source_system": true,
      "open_source_model": false,
      "resolved_percent": 78.8,
      "attempts": "2+",
      "verified": false,
      "verified_note": null,
      "total_cost_usd": null,
      "mean_cost_per_instance_usd": null,
      "mean_api_calls_per_instance": null,
      "agent_version": null,
      "reasoning_effort": null,
      "system_url": [
        "https://github.com/bytedance/trae-agent",
        "https://seed.bytedance.com/"
      ]
    },
    {
      "entry": "live-SWE-agent + Gemini 3 Pro Preview (2025-11-18)",
      "entry_date": "2025-11-20",
      "source_folder": "20251120_livesweagent_gemini-3-pro-preview",
      "agent": "live-SWE-agent",
      "agent_org": "UIUC",
      "model": "Gemini 3 Pro Preview",
      "model_org": "Google DeepMind",
      "models": [
        "gemini-3-pro-preview"
      ],
      "model_release_date": null,
      "open_source_system": true,
      "open_source_model": false,
      "resolved_percent": 77.4,
      "attempts": "1",
      "verified": false,
      "verified_note": "false (See README.md for info on how to get your results verified)",
      "total_cost_usd": null,
      "mean_cost_per_instance_usd": null,
      "mean_api_calls_per_instance": null,
      "agent_version": null,
      "reasoning_effort": null,
      "system_url": "https://github.com/OpenAutoCoder/live-swe-agent"
    },
    {
      "entry": "Atlassian Rovo Dev (2025-09-02)",
      "entry_date": "2025-09-02",
      "source_folder": "20250902_atlassian-rovo-dev",
      "agent": "Atlassian Rovo Dev",
      "agent_org": "Atlassian",
      "model": "Multiple",
      "model_org": "Anthropic",
      "models": [
        "claude-sonnet-4-20250514",
        "gpt-5"
      ],
      "model_release_date": null,
      "open_source_system": false,
      "open_source_model": false,
      "resolved_percent": 76.8,
      "attempts": "2",
      "verified": false,
      "verified_note": null,
      "total_cost_usd": null,
      "mean_cost_per_instance_usd": null,
      "mean_api_calls_per_instance": null,
      "agent_version": null,
      "reasoning_effort": null,
      "system_url": "https://www.atlassian.com/rovo-dev"
    },
    {
      "entry": "EPAM AI/Run Developer Agent v20250719 + Claude 4 Sonnet",
      "entry_date": "2025-08-04",
      "source_folder": "20250804_epam-ai-run-claude-4-sonnet",
      "agent": "EPAM AI/Run Developer Agent",
      "agent_org": "EPAM Systems, Inc.",
      "model": "Claude 4 Sonnet",
      "model_org": "Anthropic",
      "models": [
        "claude-sonnet-4-20250514"
      ],
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      "open_source_model": false,
      "resolved_percent": 76.8,
      "attempts": "2+",
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      "mean_cost_per_instance_usd": null,
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      "agent_version": null,
      "reasoning_effort": null,
      "system_url": "https://www.epam.com/services/artificial-intelligence"
    },
    {
      "entry": "mini-SWE-agent + Claude 4.5 Opus (high)",
      "entry_date": "2026-02-17",
      "source_folder": "20260217_mini-v2.0.0_claude-4-5-opus-high",
      "agent": "mini-SWE-agent",
      "agent_org": "SWE-agent",
      "model": "Claude 4.5 Opus",
      "model_org": "Anthropic",
      "models": [
        "claude-4-5-opus"
      ],
      "model_release_date": "2025-11-24",
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      "open_source_model": false,
      "resolved_percent": 76.8,
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      "system_url": "https://mini-swe-agent.com/latest/"
    },
    {
      "entry": "ACoder",
      "entry_date": "2025-08-19",
      "source_folder": "20250819_ACoder",
      "agent": "ACoder",
      "agent_org": "ACoder",
      "model": "Multiple",
      "model_org": "Anthropic",
      "models": [
        "claude-4-sonnet",
        "claude-4.1-opus",
        "gpt-5-0807-global",
        "gemini-2.5-pro-06-17"
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      "resolved_percent": 76.4,
      "attempts": "2+",
      "verified": false,
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      "system_url": "https://github.com/ACoder-AI/ACoder"
    },
    {
      "entry": "mini-SWE-agent + Gemini 3 Flash (high)",
      "entry_date": "2026-02-17",
      "source_folder": "20260217_mini-v2.0.0_gemini-3-flash-high",
      "agent": "mini-SWE-agent",
      "agent_org": "SWE-agent",
      "model": "Gemini 3 Flash",
      "model_org": "Google DeepMind",
      "models": [
        "gemini-3-flash-preview"
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    },
    {
      "entry": "mini-SWE-agent + MiniMax M2.5 (high)",
      "entry_date": "2026-02-17",
      "source_folder": "20260217_mini-v2.0.0_minimax-2-5-high",
      "agent": "mini-SWE-agent",
      "agent_org": "SWE-agent",
      "model": "MiniMax M2.5",
      "model_org": "Minimax",
      "models": [
        "minimax-m2.5"
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    },
    {
      "entry": "Warp",
      "entry_date": "2025-09-01",
      "source_folder": "20250901_warp",
      "agent": "Warp",
      "agent_org": "Warp",
      "model": "Multiple",
      "model_org": "OpenAI",
      "models": [
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        "claude-sonnet-4-20250514"
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    },
    {
      "entry": "mini-SWE-agent + Claude 4.6 Opus",
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      "agent": "mini-SWE-agent",
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        "claude-opus-4-6"
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    {
      "entry": "TRAE + Claude Sonnet 4 + Opus 4 + Sonnet 3.7 + Gemini 2.5 Pro",
      "entry_date": "2025-06-12",
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      "agent": "TRAE",
      "agent_org": "TRAE",
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        "gemini-2.5-pro-preview-06-05"
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      "entry": "Harness AI",
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      "agent": "Harness AI",
      "agent_org": "Harness",
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      "entry": "Sonar Foundation Agent + Claude 4.5 Sonnet",
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      "source_folder": "20251103_sonar-foundation-agent_claude-sonnet-4-5",
      "agent": "Sonar Foundation Agent",
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    {
      "entry": "Lingxi-v1.5_claude-4-sonnet-20250514",
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      "source_folder": "20250720_Lingxi-v1.5_claude-4-sonnet-20250514",
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      "agent_org": "Lingxi",
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    {
      "entry": "JoyCode + Claude 4 Sonnet + GPT-4.1",
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      "source_folder": "20250915_JoyCode",
      "agent": "JoyCode",
      "agent_org": "JoyCode",
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        "claude-4-sonnet",
        "gpt-4.1"
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      "entry": "Refact.ai Agent + Claude 4 Sonnet + o4-mini",
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      "source_folder": "20250603_Refact_Agent_claude-4-sonnet",
      "agent": "Refact.ai Agent",
      "agent_org": "Refact.ai",
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        "o4-mini"
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    {
      "entry": "Prometheus-v1.2.1 + GPT-5",
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      "source_folder": "20251015_Prometheus_v1.2.1_gpt5",
      "agent": "Prometheus-v1.2.1",
      "agent_org": "EuniAI",
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    {
      "entry": "mini-SWE-agent + Gemini 3 Pro Preview (2025-11-18)",
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