Claude Opus 4.5 vs GPT-5.5
Side-by-side comparison. Updated 2026-07-18.
Summary
Compare Claude Opus 4.5 and GPT-5.5 across pricing, context window, modalities, strengths, weaknesses, and best-fit workloads.
Use the details below to weigh cost, context, modalities, and workload fit.
At a Glance
| Attribute | Claude Opus 4.5 | GPT-5.5 |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Tags | Intelligent Reasoning Multimodal | Intelligent Reasoning Multimodal |
| Context | 200,000 tokens | 128,000 tokens |
| Input price | $15.00/1M | $12.50/1M |
| Output price | $75.00/1M | $50.00/1M |
| Input modalities | Text | Text |
| Output modalities | Text | Text |
Claude Opus 4.5 Strengths
- Best-in-class reasoning depth
- Superior coding ability
- Excellent instruction following
- Strong multilingual performance
- Nuanced creative writing
GPT-5.5 Strengths
- Strong general knowledge
- Deep reasoning chain-of-thought
- Reliable structured output
- Broad tool-use capability
- Excellent multilingual support