OpenAI: GPT-5.5 Pro vs OpenAI: o4 Mini
Side-by-side comparison. Updated 2026-06-08.
Verdict
OpenAI: GPT-5.5 Pro wins on higher overall score (9.5 vs 8.3, +1.2).
- Larger context window (1050k vs 200k)
At a Glance
| Attribute | OpenAI: GPT-5.5 Pro | OpenAI: o4 Mini |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Tags | Intelligent Reasoning Coding Agentic Long Context | Reasoning |
| Context | 1,050,000 tokens | 200,000 tokens |
| Input price | $30.00/1M | $1.10/1M |
| Output price | $4.40/1M | $4.40/1M |
| Input modalities | File, Image, Text | Image, Text, File |
| 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
OpenAI: o4 Mini Strengths
- Fast cost-efficient reasoning in OpenAI o-series
- Multimodal input support (text + vision)
- Strong tool use and agentic capabilities
- Competitive performance on math and coding benchmarks