SWE-bench Multimodal
SWE-bench tasks whose issues include screenshots or design mockups from visual JavaScript repos. Patch graded by hidden tests.
- Released
- October 2024
- Kind
- Fixing real repositories
- Level
- Expert
- Scored
- Checked automatically
- Answers
- Code
- Tasks
- Public, plus a private test set
- Strongest model tested
- Claude Fable 5.2 #1 on the capability index
- Last in a launch post
- November 2026
- Last model added
- November 2026
- Scores refreshed
- November 12th, 2026
In the authors’ words
Autonomous systems for software engineering are now capable of fixing bugs and developing features. These systems are commonly evaluated on SWE-bench (Jimenez et al., 2024a), which assesses their ability to solve software issues from GitHub repositories. However, SWE-bench uses only Python repositories, with problem statements presented predominantly as text and lacking visual elements such as images. This limited coverage motivates our inquiry into how existing systems might perform on unrepresented software engineering domains (e.g., front-end, game development, DevOps), which use different programming languages and paradigms. Therefore, we propose SWE-bench Multimodal (SWE-bench M), to evaluate systems on their ability to fix bugs in visual, user-facing JavaScript software. SWE-bench M features 617 task instances collected from 17 JavaScript libraries used for web interface design, diagramming, data visualization, syntax highlighting, and interactive mapping. Each SWE-bench M task instance contains at least one image in its problem statement or unit tests. Our analysis finds that top-performing SWE-bench systems struggle with SWE-bench M, revealing limitations in visual problem-solving and cross-language generalization. Lastly, we show that SWE-agent's flexible language-agnostic features enable it to substantially outperform alternatives on SWE-bench M, resolving 12% of task instances compared to 6% for the next best system.
Claude Fable 5.2 leads with 74.1%
Best score per model as labs report them in their own cards. Labs pick their own settings, so these compare less cleanly than independent runs.
o3 leads with 36% across all independent runs
Best score per model across the official leaderboard, Epoch AI’s own runs and any board Epoch AI copied. Each bar and row names its source.
Claude Fable 5.2 leads with 74.1%, claims included
Best score per model from every source, including labs’ own numbers and claims Epoch AI collected from reports and papers. Labs pick their own settings, so a claim can beat an independent run of the same model.
- 1 Claude Fable 5.2 74.1%
- 2 Claude Opus 5.5 61.4%
- 3 Claude Opus 5 59.4%
- 4 Claude Mythos Preview 59%
- 5 Claude Fable 5.1 54.7%
- 6 Claude Sonnet 5.5 54.3%
- 7
Inkling 2 Small 43.1%
- 8
Qwen 3.8 27B 38.6%
- 9 Claude Opus 4.8 38.4%
- 10 Claude Opus 4.7 34.5%
- 11 Claude Haiku 5.5 30.7%
- 12 Claude Sonnet 5 28.1%
Source: Labs’ model cards
- 1 o3 36%
- 2 Claude Sonnet 4 35.6%
- 3 o4-mini 33.9%
- 4 Claude 3.7 Sonnet 31.3%
- 5 GPT-4.1 31.1%
- 6 GPT-4o Mar 2025 30.4%
- 7 Claude 3.5 Sonnet (October 2024) 25.3%
- 8 Claude 3.5 Sonnet 12.2%
- 9 GPT-4o Aug 2024 12.2%
Source: Official SWE-bench Multimodal leaderboard
- 74.1 Claude Fable 5.2
- 61.4 Claude Opus 5.5
- 59.4 Claude Opus 5
- 59.0 Claude Mythos Preview
- 54.7 Claude Fable 5.1
- 54.3 Claude Sonnet 5.5
- 43.1
Inkling 2 Small
- 38.6
Qwen 3.8 27B
- 38.4 Claude Opus 4.8
- 36.0 o3
- 35.6 Claude Sonnet 4
- 34.5 Claude Opus 4.7
- 33.9 o4-mini
- 31.3 Claude 3.7 Sonnet
- 31.1 GPT-4.1
- 30.7 Claude Haiku 5.5
- 30.4 GPT-4o
- 28.1 Claude Sonnet 5
- 25.3 Claude 3.5 Sonnet (October 2024)
- 12.2 Claude 3.5 Sonnet
- 12.2 GPT-4o
- 1 Claude Fable 5.2 74.1%
- 2 Claude Opus 5.5 61.4%
- 3 Claude Opus 5 59.4%
- 4 Claude Mythos Preview 59%
- 5 Claude Fable 5.1 54.7%
- 6 Claude Sonnet 5.5 54.3%
- 7
Inkling 2 Small 43.1%
- 8
Qwen 3.8 27B 38.6%
- 9 Claude Opus 4.8 38.4%
- 10 o3 36%
- 11 Claude Sonnet 4 35.6%
- 12 Claude Opus 4.7 34.5%
- 13 o4-mini 33.9%
- 14 Claude 3.7 Sonnet 31.3%
- 15 GPT-4.1 31.1%
- 16 Claude Haiku 5.5 30.7%
- 17 GPT-4o Mar 2025 30.4%
- 18 Claude Sonnet 5 28.1%
- 19 Claude 3.5 Sonnet (October 2024) 25.3%
- 20 Claude 3.5 Sonnet 12.2%
- 21 GPT-4o Aug 2024 12.2%
Sources: Labs’ model cards and official SWE-bench Multimodal leaderboard
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | Claude Fable 5.2 | 74.1% | Nov 2026 | Lab model card | |
| 2 | Claude Opus 5.5 | 61.4% | Sep 2026 | Lab model card | |
| 3 | Claude Opus 5 | 59.4% | Jul 2026 | Lab model card | |
| 4 | Claude Mythos Preview | 59% | Apr 2026 | Lab model card | |
| 5 | Claude Fable 5.1 | 54.7% | Sep 2026 | Lab model card | |
| 6 | Claude Sonnet 5.5 | 54.3% | Sep 2026 | Lab model card | |
| 7 | | 43.1% | Nov 2026 | Lab model card | |
| 8 | | 38.6% | Aug 2026 | Lab model card | |
| 9 | Claude Opus 4.8 | 38.4% | May 2026 | Lab model card | |
| 10 | Claude Opus 4.7 | 34.5% | Apr 2026 | Lab model card | |
| 11 | Claude Haiku 5.5 | 30.7% | Oct 2026 | Lab model card | |
| 12 | Claude Sonnet 5 | 28.1% | Jun 2026 | Lab model card |
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | o3 | 36% | GUIRepair | Apr 2025 | Official leaderboard |
| 2 | Claude Sonnet 4 | 35.6% | Refact.ai Agent | May 2025 | Official leaderboard |
| 3 | o4-mini | 33.9% | GUIRepair | Apr 2025 | Official leaderboard |
| 4 | Claude 3.7 Sonnet | 31.3% | OpenHands-Versa | Feb 2025 | Official leaderboard |
| 5 | GPT-4.1 | 31.1% | GUIRepair | Apr 2025 | Official leaderboard |
| 6 | GPT-4o Mar 2025 | 30.4% | GUIRepair | Mar 2025 | Official leaderboard |
| 7 | Claude 3.5 Sonnet (October 2024) | 25.3% | Agentless Lite | Oct 2024 | Official leaderboard |
| 8 | Claude 3.5 Sonnet | 12.2% | SWE-agent | Jun 2024 | Official leaderboard |
| 9 | GPT-4o Aug 2024 | 12.2% | SWE-agent Multimodal | Aug 2024 | Official leaderboard |
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | Claude Fable 5.2 | 74.1% | Nov 2026 | Lab model card | |
| 2 | Claude Opus 5.5 | 61.4% | Sep 2026 | Lab model card | |
| 3 | Claude Opus 5 | 59.4% | Jul 2026 | Lab model card | |
| 4 | Claude Mythos Preview | 59% | Apr 2026 | Lab model card | |
| 5 | Claude Fable 5.1 | 54.7% | Sep 2026 | Lab model card | |
| 6 | Claude Sonnet 5.5 | 54.3% | Sep 2026 | Lab model card | |
| 7 | | 43.1% | Nov 2026 | Lab model card | |
| 8 | | 38.6% | Aug 2026 | Lab model card | |
| 9 | Claude Opus 4.8 | 38.4% | May 2026 | Lab model card | |
| 10 | o3 | 36% | GUIRepair | Apr 2025 | Official leaderboard |
| 11 | Claude Sonnet 4 | 35.6% | Refact.ai Agent | May 2025 | Official leaderboard |
| 12 | Claude Opus 4.7 | 34.5% | Apr 2026 | Lab model card | |
| 13 | o4-mini | 33.9% | GUIRepair | Apr 2025 | Official leaderboard |
| 14 | Claude 3.7 Sonnet | 31.3% | OpenHands-Versa | Feb 2025 | Official leaderboard |
| 15 | GPT-4.1 | 31.1% | GUIRepair | Apr 2025 | Official leaderboard |
| 16 | Claude Haiku 5.5 | 30.7% | Oct 2026 | Lab model card | |
| 17 | GPT-4o Mar 2025 | 30.4% | GUIRepair | Mar 2025 | Official leaderboard |
| 18 | Claude Sonnet 5 | 28.1% | Jun 2026 | Lab model card | |
| 19 | Claude 3.5 Sonnet (October 2024) | 25.3% | Agentless Lite | Oct 2024 | Official leaderboard |
| 20 | Claude 3.5 Sonnet | 12.2% | SWE-agent | Jun 2024 | Official leaderboard |
| 21 | GPT-4o Aug 2024 | 12.2% | SWE-agent Multimodal | Aug 2024 | Official leaderboard |
The benchmark's own leaderboard has 10 entries, 9 of them models we track. Switch the scores above to rank them together.
4 models have held number one in labs’ own numbers since its release in October 2024 4 models have held number one across all independent runs since its release in October 2024 8 models have held number one with claims included since its release in October 2024
Lab claims count from the day the card came out, independent runs from the model’s release. We draw one row each for the benchmark’s own leaderboard and what labs claim in their cards.
Sources: Official SWE-bench Multimodal leaderboard and labs’ model cards
Scores over time
All the scores we have, one dot each, so a model tested at several settings appears more than once.
Sources: Official SWE-bench Multimodal leaderboard and labs’ model cards
3 labs put it in a launch post in the last six months
Launch posts from every lab that has listed it, one tick per post. Tall colored ticks include it, and short gray ones leave it out.
| Date | Launch post | Score | As the post writes it |
|---|---|---|---|
| Nov 9, 2026 | Claude Fable 5.2 | 74.1 | SWE-bench Multimodal, adaptive thinking max effort, average of five trials (Table 8.1.A only) |
| Nov 5, 2026 | 43.1 | SWE-bench Multimodal v2, 43.1% | |
| Oct 7, 2026 | Claude Haiku 5.5 | 30.7 | SWE-bench Multimodal |
| Sep 28, 2026 | Claude Sonnet 5.5 | 54.3 | SWE-Bench Multimodal |
| Sep 22, 2026 | Claude Opus 5.5 | 61.4 | SWE-bench Multimodal |
| Sep 1, 2026 | Claude Fable 5.1 | 54.7 | SWE-bench Multimodal |
| Aug 14, 2026 | 38.6 | Multimodal software engineering SWE-MM (SWE-bench Multimodal dev split, Claude Code) | |
| Jul 24, 2026 | Claude Opus 5 | 59.4 | SWE-bench Multimodal |
| May 28, 2026 | Claude Opus 4.8 | 38.4 | SWE-bench Multimodal |
| Apr 16, 2026 | Claude Opus 4.7 | 34.5 | SWE-bench Multimodal |
| Apr 7, 2026 | Claude Mythos Preview | 59 | SWE-bench Multimodal (internal implementation) |
10 system cards report it, from 1 lab
Besides launch posts, we read the system cards, model cards and technical reports labs publish with a release. They report far more, including safety and frontier-risk tests.
| Date | Document | Score | As the document writes it | Section |
|---|---|---|---|---|
| Nov 9, 2026 | Claude Fable 5.2 system card | 74.1 | SWE-bench Multimodal, adaptive thinking max effort, average of five trials (Table 8.1.A and Section 8.2) | Capabilities |
| Oct 7, 2026 | Claude Haiku 5.5 system card | 30.7 | SWE-bench Multimodal, average of five trials, max effort (Table 8.1.A) | Capabilities |
| Sep 28, 2026 | Claude Sonnet 5.5 system card | 54.3 | SWE-Bench Multimodal, average of five trials (Table 8.1.A) | Capabilities |
| Sep 22, 2026 | Claude Opus 5.5 system card | 61.4 | SWE-bench Multimodal, average of five trials, max effort (Table 8.1.A, 8.2) | Capabilities |
| Sep 1, 2026 | Claude Fable 5.1 system card | 54.7 | SWE-bench Multimodal (Table 8.1.A) | Capabilities |
| Jul 24, 2026 | Claude Opus 5 system card | 59.4 | SWE-bench Multimodal, average of five trials, internal harness (Table 8.1.A, 8.2) | Capabilities |
| Jun 30, 2026 | Claude Sonnet 5 system card | 28.1 | SWE-bench Multimodal, average of five trials, internal harness (8.2) | Capabilities |
| May 28, 2026 | Claude Opus 4.8 system card | 38.4 | SWE-bench Multimodal, internal harness, average of five trials, max effort (Table 8.1.A, 8.2) | Capabilities |
| Apr 16, 2026 | Claude Opus 4.7 system card | 34.5 | SWE-bench Multimodal, internal harness, average of 5 trials (Table 8.1.A, 8.2) | Capabilities |
| Apr 7, 2026 | Claude Mythos Preview system card | 59 | SWE-bench Multimodal on an internal harness (Appendix 8.6), average of 5 trials, trial range 56.4 to 61.4 (Table 6.3.A, 6.4) | Capabilities |
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