Claude 3.5 Sonnet vs o3
Side-by-side comparison of specs, pricing, and capabilities
| Spec | 💬 Claude 3.5 Sonnet | 🧠 o3 |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Category | 💬 Text Generation | 🧠 Reasoning |
| Parameters | Undisclosed | Undisclosed |
| Context Window | 200K tokens | 200K tokens |
| License | 🔒 proprietary | 🔒 proprietary |
| Input Price | $3 | $10 |
| Output Price | $15 | $40 |
| API Available | ✅ | ✅ |
| Released | Oct 22, 2024 | Apr 16, 2025 |
| Trending Score | 🔥 85 | 🔥 91 |
Claude 3.5 Sonnet Strengths
- ✓Excellent coding
- ✓Fast responses
- ✓Great at following instructions
- ✓Strong creative writing
o3 Strengths
- ✓Top-tier reasoning
- ✓PhD-level math/science
- ✓Strong at competitive coding
- ✓Deep analysis
About Claude 3.5 Sonnet
The model that defined a generation. Fast, smart, and incredibly capable across coding, analysis, and creative tasks.
View full details →About o3
OpenAI's most powerful reasoning model. Uses chain-of-thought to solve complex math, science, and coding problems.
View full details →❓ Frequently Asked Questions
Which is better, Claude 3.5 Sonnet or o3?
It depends on your use case. Claude 3.5 Sonnet (Anthropic) has a trending score of 85, while o3 (OpenAI) scores 91. Claude 3.5 Sonnet costs $3 per 1M input tokens. Check the comparison table above for detailed specs.
Is Claude 3.5 Sonnet cheaper than o3?
Claude 3.5 Sonnet costs $3 input / $15 output per 1M tokens, while o3 costs $10 input / $40 output.
Can I use both Claude 3.5 Sonnet and o3?
Yes! Many developers use multiple models for different tasks. You might use one for complex reasoning and another for high-volume, cost-sensitive workloads.