GPT-5.5 Instant vs GPT-5 Pro
OpenAI vs OpenAI — benchmarks, pricing, and capabilities side by side.
- •GPT-5.5 Instant is cheaper ($5.00 vs $15.00 per 1M input)
| GPT-5.5 Instant | GPT-5 Pro | |
|---|---|---|
| Intelligence index | — | 88.4 |
| Developer | OpenAI | OpenAI |
| Type | LLM | LLM |
| Access | — | API only |
| Context window | — | 400,000 tokens |
| Input price | $5.00 / 1M | $15.00 / 1M |
| Output price | $30.00 / 1M | $120.00 / 1M |
| Speed | — | — |
| Released | May 5, 2026 | October 6, 2025 |
| Parameters | — | — |
| Input modalities | — | Text, Image |
| Output modalities | — | Text |