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Side-by-side comparison for AI agent model selection.
Side-by-side comparison of Claude Sonnet 4.5 and GPT-5.5. Claude Sonnet 4.5 scores 48 on quality benchmarks at $18.00/1M tokens. GPT-5.5 scores 60 at $35.00/1M tokens.
Claude Sonnet 4.5 is the more affordable option and costs less per token. GPT-5.5 leads in quality benchmarks. For budget-conscious users, go with Claude Sonnet 4.5. For maximum quality, choose GPT-5.5.
| Claude Sonnet 4.5 | GPT-5.5 | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Tier | Premium | Frontier |
| Quality Score | 48 | 60 |
| Input Price | $3.00/1M | $5.00/1M |
| Output Price | $15.00/1M | $30.00/1M |
| Speed | 70 tok/s | 81 tok/s |
| Context Window | 1.0M | 1.1M |
| Max Output | 64K | 128K |
| Reasoning | Yes | Yes |
| Vision | Yes | Yes |
| Task | Claude Sonnet 4.5 | GPT-5.5 | Savings |
|---|---|---|---|
| Coding | $35.10 | $67.50 | Claude Sonnet 4.5 saves $32.40 |
| Writing | $9.36 | $18.00 | Claude Sonnet 4.5 saves $8.64 |
| Analysis | $19.50 | $37.50 | Claude Sonnet 4.5 saves $18.00 |
| Research | $15.60 | $30.00 | Claude Sonnet 4.5 saves $14.40 |
| Math & Reasoning | $11.70 | $22.50 | Claude Sonnet 4.5 saves $10.80 |
| Creative | $7.80 | $15.00 | Claude Sonnet 4.5 saves $7.20 |