Claude Opus 4.5 vs GPT-5.5 Pro
Side-by-side comparison. Updated 2026-06-04.
Verdict
Tie — both models score equally.
Both models score equally. Pick based on which strengths align with your workload.
At a Glance
| Attribute | Claude Opus 4.5 | GPT-5.5 Pro |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Tags | general | Reasoning |
| Context | 200,000 tokens | 1,050,000 tokens |
| Input price | $15.00/1M | $30.00/1M |
| Output price | $180.00/1M | $180.00/1M |
| Input modalities | Text | Text |
| Output modalities | Text | Text |
Claude Opus 4.5 Strengths
- Pioneer extended reasoning with configurable thinking depth
- Exceptional creative writing and nuanced prose
- Strong agentic computer-use capabilities
- Excellent multilingual performance across 100+ languages
- Best-in-class instruction following and prompt adherence