# Scale Labs SWE Atlas - Test Writing (SWE Atlas - Test Writing)

> A Scale Labs public leaderboard mirrored as display-only reference data. It does not affect BenchLM rankings.

Canonical page: https://benchlm.ai/benchmarks/scale-swe-atlas-testwriting

- Category: [Coding](/coding)
- Last updated: November 12, 2026 snapshot

## About SWE Atlas - Test Writing

- Year: 2026
- Tasks: 28 published rows
- Format: Published Scale leaderboard score
- Difficulty: External agent and model evaluation
- Paper: [Scale Labs leaderboard](https://labs.scale.com/leaderboard/swe-atlas)

BenchLM mirrors 28 published rows from the SWE Atlas - Test Writing public table captured on November 12, 2026 snapshot.

SWE Atlas - Test Writing is currently displayed on BenchLM for reference, but it is excluded from the weighted scoring formula.

## Leaderboard (28 models)

| Rank | Model | Configuration | Creator | Score |
|------|-------|---------------|---------|-------|
| 1 | [Fable 5.1](https://labs.scale.com/leaderboard/swe-atlas) | SWE Atlas - Test Writing | Anthropic | 78.90% |
| 2 | [Fable 5.2](https://labs.scale.com/leaderboard/swe-atlas) | SWE Atlas - Test Writing | Anthropic | 77.80% |
| 3 | [Gemini 4 Argon](/models/gemini-4-argon) | SWE Atlas - Test Writing | Google | 77.80% |
| 4 | [Opus 5.5](https://labs.scale.com/leaderboard/swe-atlas) | SWE Atlas - Test Writing | Anthropic | 77.80% |
| 5 | [Gemini 4 Carbon](/models/gemini-4-carbon) | SWE Atlas - Test Writing | Google | 76.70% |
| 6 | [Gemini 3.8 Flash](/models/gemini-3-8-flash) | SWE Atlas - Test Writing | Google | 71.10% |
| 7 | [Sonnet 5.5](https://labs.scale.com/leaderboard/swe-atlas) | SWE Atlas - Test Writing | Anthropic | 67.80% |
| 8 | [GPT-6 Astra](/models/gpt-6-astra) | SWE Atlas - Test Writing | OpenAI | 66.70% |
| 9 | [GPT-6.1 Sol](/models/gpt-6-1-sol) | SWE Atlas - Test Writing | OpenAI | 66.70% |
| 10 | [Grok 4.7](/models/grok-4-7) | SWE Atlas - Test Writing | xAI | 64.40% |
| 11 | [GPT-6.1 Terra](/models/gpt-6-1-terra) | SWE Atlas - Test Writing | OpenAI | 63.30% |
| 12 | [Haiku 5.5](https://labs.scale.com/leaderboard/swe-atlas) | SWE Atlas - Test Writing | Anthropic | 63.30% |
| 13 | [Kimi K3](/models/kimi-k3) | SWE Atlas - Test Writing | Moonshot AI | 63.30% |
| 14 | [DeepSeek V4.1 Flash 1017](/models/deepseek-v4-1-flash) | SWE Atlas - Test Writing | DeepSeek | 61.10% |
| 15 | [Muse Wonder 1.0](https://labs.scale.com/leaderboard/swe-atlas) | SWE Atlas - Test Writing | Meta | 61.10% |
| 16 | [Kimi K3.1 Pro](/models/kimi-3-1-pro) | SWE Atlas - Test Writing | Moonshot AI | 58.90% |
| 17 | [Qwen 3.8 Max](https://labs.scale.com/leaderboard/swe-atlas) | SWE Atlas - Test Writing | Alibaba | 58.90% |
| 18 | [Inkling 2 Small](/models/inkling-2-small) | SWE Atlas - Test Writing | Thinking Machines Lab | 58.10% |
| 19 | [Muse Ember 1.0](https://labs.scale.com/leaderboard/swe-atlas) | SWE Atlas - Test Writing | Meta | 56.70% |
| 20 | [GLM-5.3](/models/glm-5-3) | SWE Atlas - Test Writing | Z.AI | 55.60% |
| 21 | [GPT-6 Luna](/models/gpt-6-luna) | SWE Atlas - Test Writing | OpenAI | 54.40% |
| 22 | [GLM-5.3-Flash](/models/glm-5-3-flash) | SWE Atlas - Test Writing | Z.AI | 53.30% |
| 23 | [Muse Spark Open](/models/muse-spark-open) | SWE Atlas - Test Writing | Meta | 41.10% |
| 24 | [MiniMax M3](/models/minimax-m3) | SWE Atlas - Test Writing | MiniMax | 40.00% |
| 25 | [Mistral Large 4](/models/mistral-large-4) | SWE Atlas - Test Writing | Mistral | 40.00% |
| 26 | [Nemotron 3.5 Super VL](https://labs.scale.com/leaderboard/swe-atlas) | SWE Atlas - Test Writing | Nvidia | 27.80% |
| 27 | [Nemotron 3 Ultra](/models/nemotron-3-ultra) | SWE Atlas - Test Writing | NVIDIA | 26.70% |
| 28 | [GPT-OSS 120B](/models/gpt-oss-120b) | SWE Atlas - Test Writing | OpenAI | 14.40% |

## FAQ

### What does SWE Atlas - Test Writing measure?

A Scale Labs public leaderboard mirrored as display-only reference data. It does not affect BenchLM rankings.

### Which model leads the published SWE Atlas - Test Writing snapshot?

Fable 5.1 currently leads the published SWE Atlas - Test Writing snapshot with a score of 78.90%.

### How many models are evaluated on SWE Atlas - Test Writing?

The November 12, 2026 snapshot contains 28 AI models.

### Does SWE Atlas - Test Writing affect BenchLM's overall score?

Not directly. SWE Atlas - Test Writing is still displayed on BenchLM for reference, but it is excluded from the weighted scoring formula.