Claude Haiku 4.5 vs o3
Claude Haiku 4.5 is cheaper on output tokens. Choose Claude Haiku 4.5 or o3 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude Haiku 4.5 | o3 |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input / 1M tokens | $1.00 | $2.00 |
| Output / 1M tokens | $5.00 | $8.00 |
| Context window | 200K | 200K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Oct 2025 | Apr 2025 |
| LiveBench score | 61.0 | — |
| GPQA Diamond score | 71.2 | 81.8 |
| FrontierMath score | 5.9 | 18.7 |
| LMArena (Chatbot Arena) Elo score | 1397 | 1410 |
| LMArena WebDev Elo score | 1330 | — |
| Epoch Capabilities Index score | 142 | 147 |
| SWE-bench Multilingual score | 64.7 | — |
| SWE-bench Verified score | 66.6 | 58.4 |
| Aider Polyglot score | — | 81.3 |
| LMArena Vision Elo score | — | 1214 |
| SWE-bench Multimodal score | — | 36.0 |
FAQ
Is Claude Haiku 4.5 or o3 cheaper?
Claude Haiku 4.5 is cheaper on output tokens ($5.00 vs $8.00 per 1M).
Which has the larger context window, Claude Haiku 4.5 or o3?
Both models offer a similar context window.
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.