# ExploitBench — Internal Port (June–August 2026) (ExploitBench Internal Port)

> OpenAI's internal port of ExploitBench restricted to V8 and Chrome vulnerabilities disclosed in June to August 2026, to limit contamination from historical exploits.

Canonical page: https://benchlm.ai/benchmarks/exploitbenchinternalport

- Category: [Agentic](/agentic)
- Last updated: November 5, 2026

## About ExploitBench Internal Port

- Year: 2026
- Tasks: Recently disclosed V8 and Chrome vulnerabilities (June–August 2026)
- Format: Mean arbitrary-code-execution success rate
- Difficulty: Browser exploitation
- Paper: [GPT-6 Cyber System Card](https://deploymentsafety.openai.com/gpt-6-cyber)

The public ExploitBench uses vulnerabilities going back to 2023 and OpenAI models now score at or near 100% on it, which OpenAI says may be inflated by contamination. The internal port reports mean arbitrary-code-execution success across recently disclosed V8 and Chrome targets: GPT-6 Cyber 42.0%, GPT-6 Astra 39.0%, GPT-5.6 Sol 5.5% (charted as GPT-5.6 under Daybreak Blue). OpenAI's later system cards report the port on a series where GPT-6 Astra scores 31.5%: GPT-6.1 Terra 24.5%, GPT-6.1 Sol 21.5%, GPT-6 Sol 5.5%, GPT-6 Luna 0% and GPT-5.6 Sol 3.5%. BenchLM stores those rows as published, so compare rows from different OpenAI documents with care. OpenAI-run, so display-only and kept separate from the public ExploitBench leaderboard.

ExploitBench Internal Port is currently displayed on BenchLM for reference, but it is excluded from the weighted scoring formula.

## Leaderboard (7 models)

| Rank | Model | Creator | Score |
|------|-------|---------|-------|
| 1 | [GPT-6 Cyber](/models/gpt-6-cyber) | OpenAI | 42.0% |
| 2 | [GPT-6 Astra](/models/gpt-6-astra) | OpenAI | 39.0% |
| 3 | [GPT-6.1 Terra](/models/gpt-6-1-terra) | OpenAI | 24.5% |
| 4 | [GPT-6.1 Sol](/models/gpt-6-1-sol) | OpenAI | 21.5% |
| 5 | [GPT-6 Sol](/models/gpt-6-sol) | OpenAI | 5.5% |
| 6 | [GPT-5.6 Sol](/models/gpt-5-6-sol) | OpenAI | 5.5% |
| 7 | [GPT-6 Luna](/models/gpt-6-luna) | OpenAI | 0.0% |

## FAQ

### What does ExploitBench Internal Port measure?

OpenAI's internal port of ExploitBench restricted to V8 and Chrome vulnerabilities disclosed in June to August 2026, to limit contamination from historical exploits.

### Which model scores highest on ExploitBench Internal Port?

GPT-6 Cyber by OpenAI currently leads with a score of 42.0% on ExploitBench Internal Port.

### How many models are evaluated on ExploitBench Internal Port?

7 AI models have published results on ExploitBench Internal Port in the BenchLM catalog.

### Does ExploitBench Internal Port affect BenchLM's overall score?

Not directly. ExploitBench Internal Port is still displayed on BenchLM for reference, but it is excluded from the weighted scoring formula.

## Compare Top Models on ExploitBench Internal Port

- [GPT-6 Cyber vs GPT-6 Astra](/compare/gpt-6-astra-vs-gpt-6-cyber)
- [GPT-6 Astra vs GPT-6.1 Terra](/compare/gpt-6-1-terra-vs-gpt-6-astra)
- [GPT-6.1 Terra vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-gpt-6-1-terra)
- [GPT-6.1 Sol vs GPT-6 Sol](/compare/gpt-6-1-sol-vs-gpt-6-sol)