Claude Sonnet 4.5 is the newer model, released after GPT-5 Nano.
| Spec | Claude Sonnet 4.5 | GPT-5 Nano |
|---|---|---|
| Input price | $3/M tokens | — |
| Output price | $15/M tokens | — |
| Context window | 200K tokens | — |
| Released | Sep 2025 | Aug 2025 |
| SWE-bench Verified | 77.2% | 54.7% |
Not enough votes to call it. On the specs, Claude Sonnet 4.5 has the edge: bigger model tier, newer, bigger context window.
Claude Sonnet 4.5 uses 490.1x more bold
Claude Sonnet 4.5 is the newer model, released after GPT-5 Nano.
| Spec | Claude Sonnet 4.5 | GPT-5 Nano |
|---|---|---|
| Input price | $3/M tokens | — |
| Output price | $15/M tokens | — |
| Context window | 200K tokens | — |
| Released | Sep 2025 | Aug 2025 |
| SWE-bench Verified | 77.2% | 54.7% |
Not enough votes to call it. On the specs, Claude Sonnet 4.5 has the edge: bigger model tier, newer, bigger context window.
Claude Sonnet 4.5 uses 490.1x more bold