OpenAI: GPT-5.5 Pro vs Gemini Ultra 2
Side-by-side comparison. Updated 2026-06-07.
Verdict
OpenAI: GPT-5.5 Pro wins on higher overall score (9.5 vs 9.2, +0.3).
Both models score equally. Pick based on which strengths align with your workload.
At a Glance
| Attribute | OpenAI: GPT-5.5 Pro | Gemini Ultra 2 |
|---|---|---|
| Provider | OpenAI | Google DeepMind |
| Tags | Intelligent Reasoning Coding Agentic Long Context | general |
| Context | 1,050,000 tokens | 1,000,000 tokens |
| Input price | $30.00/1M | $10.00/1M |
| Output price | $40.00/1M | $40.00/1M |
| Input modalities | File, Image, Text | Text |
| Output modalities | Text | Text |
OpenAI: GPT-5.5 Pro Strengths
- Unmatched deep reasoning for complex high-stakes workloads
- 1M+ token context window with image input support
- Excels at long-horizon agents and multi-step coding
- Precise execution across agentic workflows
Gemini Ultra 2 Strengths
- Best multimodal understanding
- Massive context window
- Strong on reasoning
- Native YouTube/video understanding
- Tight Google ecosystem integration