OpenAI GPT-6 Astra Launch - Internal Capability Hallucination Benchmark: leaderboard
Alignment table of OpenAI's GPT-6 Astra launch post (2026-09-03): OpenAI's internal capability-hallucination evaluation, the rate of inaccurate or misleading claims a model makes about its own capabilities and affordances. Percent, lower is better; only GPT-6 Astra and GPT-5.6 Sol have values.
Metric: Capability-hallucination rate (%). Source: openai.com. Saturation forecast: Around February 2027. 2 models tracked.
Top models
| # | Model | Score | Overall rank |
|---|---|---|---|
| 1 | GPT-6 Astra | 4.2 | #6 |
| 2 | GPT-5.6 Sol | 12.2 | #22 |
No result here: #3 Claude Opus 5.5, #7 GPT-6.1 Sol, #9 Gemini 4 Argon.
Interactive version: theaggregate.ai/benchmark?slug=openai-gpt-6-astra-launch-internal-capability-hallucination-benchmark · How It Works · Data refreshed daily, snapshot 2026-11-05.