GPT-5.1 vs Reka Flash 3
OpenAI vs Reka AI — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1 has the higher intelligence index (89 vs 56.2)
- •Reka Flash 3 is cheaper ($0.10 vs $1.25 per 1M input)
- •GPT-5.1 is faster
- •GPT-5.1 has a larger context window (400K)
| GPT-5.1 | Reka Flash 3 | |
|---|---|---|
| Intelligence index | 89 | 56.2 |
| Developer | OpenAI | Reka AI |
| Type | LLM | LLM |
| Access | API only | Open weights |
| Context window | 400,000 tokens | 65,536 tokens |
| Input price | $1.25 / 1M | $0.10 / 1M |
| Output price | $10.00 / 1M | $0.20 / 1M |
| Speed | 115 tok/s | 93 tok/s |
| Released | November 12, 2025 | March 12, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
Shared benchmarks
GPT-5.1
Reka Flash 3
AIME 2025
94
33.7
GPQA Diamond
88.1
52.9
Humanity’s Last Exam
26.5
5.1
LiveCodeBench
86.8
43.5
MMLU-Pro
87
66.9