Automated page. Written and translated automatically by AI and checked against the sources by software; no human editor. SI-IQ is an index built from public benchmark results, not an IQ test. How it works
How smart is GPT-5.4 Pro?
GPT-5.4 Pro is a model from OpenAI, released on Mar 5, 2026. Its SI-IQ is 135 (90% interval 131–138), estimated from 5 benchmark results by 1 evaluator.
Data as of Oct 18, 2026 · method 1.0.0
A model is ranked when its results come from at least 5 benchmarks (the two GPQA Diamond runs count as one) in at least 3 areas, from at least 2 different evaluators, and its versions are released no more than 60 days apart. This model does not meet that yet (results from fewer than 2 evaluators). Its provisional estimate rests on 5 benchmark results and can change a lot when more results arrive.
Facts
- Developer
- OpenAI
- Released
- Mar 5, 2026
- Access
- API access
- Benchmarks used
- 5 benchmark results from 1 evaluator
Ability by area (SI-IQ, 90% interval)
Every benchmark result we used
Each score is one value exactly as the source published it: for Epoch AI the best of its run settings, for OpenRouter the median hosting provider (the developer's own hosting when it ran the test). “Implied SI-IQ” is the ability that this single result points to; the overall SI-IQ is their precision-weighted average.
| Benchmark | Score | Evaluated by | Source |
|---|---|---|---|
| Chess Puzzles | 59.0% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| FrontierMath Tier 4 | 58.5% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| FrontierMath Tiers 1–3 | 82.5% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| GPQA Diamond | 94.6% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| SimpleQA Verified | 46.3% | Epoch AI | Epoch AI Benchmarking Hub · data file |
Computed with SI-IQ method version 1.0.0. Read the full methodology
Data sources: Epoch AI, ‘Capabilities & benchmarking’ (CC BY 4.0) (licences and changes).