Anthropic: Claude Sonnet 4 vs OpenAI: GPT-4o
Side-by-side comparison based on OpenRouter API data.
Key Differences
- •OpenAI: GPT-4o is 1.2x cheaper than Anthropic: Claude Sonnet 4 for input tokens
- •Anthropic: Claude Sonnet 4 has 1.6x more context than OpenAI: GPT-4o (200K vs 128K)
| Spec | Anthropic: Claude Sonnet 4 | OpenAI: GPT-4o |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Context Length | 200K | 128K |
| Max Output | 64K | 16K |
| Input Price/1M | $3.00 | $2.50 |
| Output Price/1M | $15 | $10 |
| Cache Read/1M | $0.30 | $1.25 |
| Cache Write/1M | $3.75 | Free |
| Input Modalities | Image + Text + File | Text + Image + File |
| Output Modalities | Text | Text |
| Tokenizer | Claude | GPT |
| Moderated | Yes | Yes |