GPT-5.5 vs OpenAI: o4 Mini
Side-by-side comparison. Updated 2026-06-08.
Verdict
GPT-5.5 wins on higher overall score (9.4 vs 8.3, +1.1).
Both models score equally. Pick based on which strengths align with your workload.
At a Glance
| Attribute | GPT-5.5 | OpenAI: o4 Mini |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Tags | general | Reasoning |
| Context | 128,000 tokens | 200,000 tokens |
| Input price | $12.50/1M | $1.10/1M |
| Output price | $4.40/1M | $4.40/1M |
| Input modalities | Text | Image, Text, File |
| Output modalities | Text | Text |
GPT-5.5 Strengths
- Strong general knowledge
- Deep reasoning chain-of-thought
- Reliable structured output
- Broad tool-use capability
- Excellent multilingual support
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