Claude Haiku 4.5 vs GPT-5.1
Anthropic vs OpenAI — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1 has the higher intelligence index (89 vs 75.3)
- •Claude Haiku 4.5 is cheaper ($1.00 vs $1.25 per 1M input)
- •GPT-5.1 is faster
- •GPT-5.1 has a larger context window (400K)
| Claude Haiku 4.5 | GPT-5.1 | |
|---|---|---|
| Intelligence index | 75.3 | 89 |
| Developer | Anthropic | OpenAI |
| Type | LLM | LLM |
| Access | API only | API only |
| Context window | 200,000 tokens | 400,000 tokens |
| Input price | $1.00 / 1M | $1.25 / 1M |
| Output price | $5.00 / 1M | $10.00 / 1M |
| Speed | 100 tok/s | 115 tok/s |
| Released | October 15, 2025 | November 12, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
Claude Haiku 4.5
GPT-5.1
AIME 2025
96.3
94
GPQA Diamond
73
88.1
Humanity’s Last Exam
9.7
26.5
LiveCodeBench
61.5
86.8
MMLU-Pro
80
87