Claude 2 vs GPT-5 Pro
Anthropic vs OpenAI — benchmarks, pricing, and capabilities side by side.
- •GPT-5 Pro has the higher intelligence index (88.4 vs 33.4)
- •Claude 2 is cheaper ($0.00 vs $15.00 per 1M input)
- •GPT-5 Pro has a larger context window (400K)
| Claude 2 | GPT-5 Pro | |
|---|---|---|
| Intelligence index | 33.4 | 88.4 |
| Developer | Anthropic | OpenAI |
| Type | LLM | LLM |
| Access | API only | API only |
| Context window | 100,000 tokens | 400,000 tokens |
| Input price | $0.00 / 1M | $15.00 / 1M |
| Output price | $0.00 / 1M | $120.00 / 1M |
| Speed | — | — |
| Released | July 11, 2023 | October 6, 2025 |
| Parameters | — | — |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
Claude 2
GPT-5 Pro
GPQA Diamond
34.4
88.4