GPT-5.5 Pro vs GPT-5.5 Instant
Side-by-side comparison. Updated 2026-06-04.
Verdict
GPT-5.5 Pro wins on higher overall score (9.5 vs 8.6, +0.9).
- Larger context window (1050k vs 128k)
At a Glance
| Attribute | GPT-5.5 Pro | GPT-5.5 Instant |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Tags | Reasoning | general |
| Context | 1,050,000 tokens | 128,000 tokens |
| Input price | $30.00/1M | $2.00/1M |
| Output price | $10.00/1M | $10.00/1M |
| Input modalities | Text | Text |
| Output modalities | Text | Text |
GPT-5.5 Pro Strengths
GPT-5.5 Instant Strengths
- Near-frontier quality at speed-optimized pricing
- Fastest inference in the GPT-5.5 family
- Strong coding for a cost-efficient variant
- Good for high-throughput production pipelines
- Suitable replacement for GPT-5 Turbo in most workloads