o3-mini vs Claude Haiku 4.5
Pricing, context window, and benchmark comparison · Last updated June 2026
Claude Haiku 4.5 is cheaper than o3-mini at $1.00/1M vs $1.10/1M input tokens — a 1.1x cost difference. o3-mini scores higher on quality benchmarks (ELO 1340). Choose Claude Haiku 4.5 for cost-sensitive workloads; choose o3-mini for maximum quality.
Which is cheaper: o3-mini or Claude Haiku 4.5?
Claude Haiku 4.5 is the cheaper option at $1.00/1M per 1M input tokens, compared to $1.10/1M for o3-mini. That is a 1.1x cost difference on input tokens. Output pricing follows a similar pattern: o3-mini charges $4.40/1M vs $5.00/1M for Claude Haiku 4.5.
Which has better quality: o3-mini or Claude Haiku 4.5?
Based on LMSYS Chatbot Arena rankings, o3-mini achieves a higher ELO score (1340 vs 1320), suggesting stronger performance on open-ended tasks. o3-mini excels at strong reasoning at a low price point. Claude Haiku 4.5 is known for near-frontier intelligence at the lowest claude price tier.
Which should you choose: o3-mini or Claude Haiku 4.5?
- → Strong reasoning at a low price point
- → 200K context window
- → Three effort levels (low/medium/high) for cost control
- → Near-frontier intelligence at the lowest Claude price tier
- → Fastest Claude model
- → 200K context window
Frequently Asked Questions
Which is cheaper: o3-mini or Claude Haiku 4.5?
Claude Haiku 4.5 is cheaper at $1.00/1M per 1M input tokens, making it 1.1x more affordable.
Which has better quality: o3-mini or Claude Haiku 4.5?
o3-mini scores higher on the LMSYS Chatbot Arena with an ELO of 1340, suggesting better overall quality for most tasks.
Which has a larger context window: o3-mini or Claude Haiku 4.5?
Both o3-mini and Claude Haiku 4.5 have the same context window.
Should I choose o3-mini or Claude Haiku 4.5?
Choose Claude Haiku 4.5 if cost is the priority. Choose o3-mini if benchmark quality is most important. Consider your specific use case: o3-mini is best for reasoning and math, while Claude Haiku 4.5 excels at fast-response and customer-support.
Is o3-mini or Claude Haiku 4.5 open source?
o3-mini is proprietary. Claude Haiku 4.5 is proprietary.