EdgeBench
Agents iterate for up to 12 hours on 134 executable real-world tasks with multi-level feedback. Scores are tracked at 2 hour steps to measure learning from the environment.
51 of the 134 tasks are open source. Tasks fall in six groups: scientific and ML, systems and SE, optimization, knowledge, formal and games. The harness is called SForge.
- Made by
- ByteDance Seed
- Released
- July 2026
- Kind
- Long terminal sessions
- Level
- Expert
- Scored
- Checked automatically
- Answers
- Agent task
- Tasks
- Public, plus a private test set
- Strongest model tested
- GPT-5.5 #20 on the capability index
- Last model added
- May 2026
- Scores refreshed
- November 12th, 2026
In the authors’ words
Pretraining scaling laws reveal that model capability improves predictably with data and compute. But learning from real world environments after deployment remains far less understood. Analyzing roughly 38,000 hours of agent interaction with the environment across 134 real world tasks, we find, to the best of our knowledge, the first evidence that overall performance during environment learning follows a log-sigmoid scaling law with remarkably high precision, reaching R^2 = 0.998. Across model generations, we also find that agent learning speed roughly doubles every three months. This discovery stems from EdgeBench, a suite of 134 real world tasks with ultra-long horizons, spanning scientific discovery, software engineering, combinatorial optimization, professional knowledge work, formal mathematics, and interactive games. Each task sustains at least 12 hours of continuous agent operation under rich, multilevel feedback, and is built through substantial expert effort. We publicly release 51 tasks and our full evaluation framework to accelerate the study of how agents learn from real world experience.
Claude Opus 4.8 leads with 51.3 among models released by May 2026
Best score per model from the benchmark's own leaderboard, read on November 12th, 2026. Where a model ran with several settings or harnesses, we keep its best. Every run is in the next chart.
The newest model with a score here came out in May 2026, and nobody has tested a newer one. Among the 20 highest-ranked models on the capability index, these have no score yet:
- Claude Fable 5.2
-
Gemini 4 Carbon
- GPT-6 Astra
- Claude Opus 5.5
- and 15 more
- 1 Claude Opus 4.8 @12h 51.3
- 2 GPT-5.5 @12h 48.4
- 3 GPT-5.4 @12h 39.3
- 4 GLM-5.1 @12h 37.4
- 5
DeepSeek-V4-Pro @12h 31.0
Source: Official EdgeBench leaderboard
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | Claude Opus 4.8 | 51.3 | @12h | May 2026 | Official leaderboard |
| 2 | GPT-5.5 | 48.4 | @12h | Apr 2026 | Official leaderboard |
| 3 | GPT-5.4 | 39.3 | @12h | Mar 2026 | Official leaderboard |
| 4 | GLM-5.1 | 37.4 | @12h | Apr 2026 | Official leaderboard |
| 5 | | 31.0 | @12h | Apr 2026 | Official leaderboard |
Scores at each effort level
Models the leaderboard ran at two or more effort levels. We don’t have enough cost data here to say what the extra effort costs.
Source: Official EdgeBench leaderboard
| Model | Effort | Harness | Score | Cost per task | Output tokens |
|---|---|---|---|---|---|
| Claude Opus 4.8 | @12h | 51.3 | |||
| Claude Opus 4.8 | @10h | 50.9 | |||
| Claude Opus 4.8 | @8h | 49.8 | |||
| GPT-5.5 | @12h | 48.4 | |||
| Claude Opus 4.8 | @6h | 48.1 | |||
| GPT-5.5 | @10h | 47.6 | |||
| GPT-5.5 | @8h | 46.3 | |||
| Claude Opus 4.8 | @4h | 45.7 | |||
| GPT-5.5 | @6h | 44.5 | |||
| GPT-5.5 | @4h | 42.1 | |||
| GPT-5.4 | @12h | 39.3 | |||
| Claude Opus 4.8 | @2h | 39.0 | |||
| GPT-5.4 | @10h | 38.9 | |||
| GPT-5.4 | @8h | 38.0 | |||
| GLM-5.1 | @12h | 37.4 | |||
| GPT-5.5 | @2h | 36.8 | |||
| GPT-5.4 | @6h | 36.5 | |||
| GLM-5.1 | @10h | 36.5 | |||
| GLM-5.1 | @8h | 34.9 | |||
| GPT-5.4 | @4h | 34.0 | |||
| GLM-5.1 | @6h | 32.9 | |||
| | @12h | 31.0 | |||
| | @10h | 30.9 | |||
| GLM-5.1 | @4h | 30.4 | |||
| | @8h | 29.9 | |||
| GPT-5.4 | @2h | 29.7 | |||
| | @6h | 29.0 | |||
| | @4h | 27.1 | |||
| GLM-5.1 | @2h | 26.0 | |||
| | @2h | 23.3 |
Number one over time
Lab claims count from the day the card came out, independent runs from the model’s release.
Source: Official EdgeBench leaderboard
Scores over time
All the scores we have, one dot each, so a model tested at several settings appears more than once.
Source: Official EdgeBench leaderboard
No lab model card reports it yet
We read the headline results of 522 launch posts from 52 labs, and none of them list this benchmark.
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