GPT-5.1 vs Granite 4.1 8B
OpenAI vs IBM — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1 has the higher intelligence index (89 vs 43.3)
- •Granite 4.1 8B is cheaper ($0.05 vs $1.25 per 1M input)
- •Granite 4.1 8B is faster
- •GPT-5.1 has a larger context window (400K)
| GPT-5.1 | Granite 4.1 8B | |
|---|---|---|
| Intelligence index | 89 | 43.3 |
| Developer | OpenAI | IBM |
| Type | LLM | LLM |
| Access | API only | Open weights |
| Context window | 400,000 tokens | 131,072 tokens |
| Input price | $1.25 / 1M | $0.05 / 1M |
| Output price | $10.00 / 1M | $0.10 / 1M |
| Speed | 115 tok/s | 133 tok/s |
| Released | November 12, 2025 | April 30, 2026 |
| Parameters | — | — |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
Shared benchmarks
GPT-5.1
Granite 4.1 8B
GPQA Diamond
88.1
43.3
Humanity’s Last Exam
26.5
3.8