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?
GPT-5 is a model from OpenAI, released on Aug 7, 2025. Its SI-IQ is 121 (90% interval 118–124), estimated from 11 benchmark results by 3 independent evaluators. Its strongest area is Reasoning and its weakest is Math.
Facts
- Developer
- OpenAI
- Released
- Aug 7, 2025
- Access
- API access
- Benchmarks used
- 11 results from 3 evaluators
- API price
- $1.25 input / $10 output per 1M tokens (developer's price list, Oct 18, 2026)
- Context window
- 272,000 tokens
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 | 36.0% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| Mystery Game Puzzles | 23.0% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| FrontierMath Tier 4 | 22.0% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| FrontierMath Tiers 1–3 | 55.4% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| MATH Level 5 | 98.1% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| OTIS Mock AIME 2024–2025 | 91.4% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| Aider Polyglot | 88.0% | Aider | Aider LLM Leaderboards · data file |
| SWE-bench Verified (Epoch AI run) | 73.6% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| GPQA Diamond | 86.2% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| GPQA Diamond (OpenRouter run) | 85.0% | OpenRouter | OpenRouter benchmark datasets · data file |
| SimpleQA Verified | 50.1% | Epoch AI | Epoch AI Benchmarking Hub · data file |
| τ²-bench Airline (OpenRouter run) | 70.7% | OpenRouter | OpenRouter benchmark datasets · data file |
Models with similar SI-IQ
| Model | SI-IQ | |
|---|---|---|
| GLM-5.2Z.ai (Zhipu AI) | 121 | GPT-5 vs GLM-5.2 |
| Kimi K2.6Moonshot | 121 | GPT-5 vs Kimi K2.6 |
| GLM-5.3-FlashZ.ai (Zhipu AI) | 120 | GPT-5 vs GLM-5.3-Flash |
| GPT-5.1OpenAI | 120 | GPT-5 vs GPT-5.1 |
| Gemini 3 FlashGoogle DeepMind | 122 | GPT-5 vs Gemini 3 Flash |
Computed with SI-IQ method version 1.0.0. Read the full methodology
Data sources: Aider polyglot leaderboard data (Apache-2.0); Epoch AI, ‘Capabilities & benchmarking’ (CC BY 4.0); API list prices via LiteLLM's price table (MIT); each price links to the developer's pricing page; Source: OpenRouter (openrouter.ai), licensed under CC BY 4.0: reuse and republish with attribution to OpenRouter..