Claude Haiku 4.5 is cheaper than Claude Opus 4 at $1/M vs $15/M input tokens.
| Spec | Claude Haiku 4.5 | Claude Opus 4 |
|---|---|---|
| Input price | $1/M tokens | $15/M tokens |
| Output price | $5/M tokens | $75/M tokens |
| Context window | 200K tokens | 200K tokens |
| Weights | Closed | Closed |
| Free API (OpenRouter) | No | No |
| Released | Oct 2025 | May 2025 |
| SWE-bench Verified | 73.3% | 72.5% |
Not enough votes to call it. On the specs, nothing separates them.
Claude Haiku 4.5 costs 15x less per token.
Claude Haiku 4.5 is cheaper on both: 15× input, 15× output.
Per million tokens. Prices and uptime via OpenRouter, checked 8 Sep 2026.
Claude Opus 4 uses 5.8x more emoji