Claude Opus 4.5 vs Claude Sonnet 5
Side-by-side comparison. Updated 2026-07-04.
Summary
Compare Claude Opus 4.5 and Claude Sonnet 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 | Claude Sonnet 5 |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Tags | Intelligent Reasoning Multimodal | Intelligent Reasoning Coding Agentic Image Input Long Context |
| Context | 200,000 tokens | 1,000,000 tokens |
| Input price | $15.00/1M | $2.00/1M |
| Output price | $75.00/1M | $10.00/1M |
| Input modalities | Text | Text, Image, File |
| 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
Claude Sonnet 5 Strengths
- 76.1% on Novel Compiler evaluation (vendor-reported)
- 1,000,000 token (~977K) context window with 128k output
- $2.00/M input tokens — 85% cheaper than GPT-5.5 Pro
- 96.65% harmless response rate on API (vendor-reported)
- Up to 90% cost savings with prompt caching