o4-mini vs Claude Haiku 4.5
Pricing, context window, and benchmark comparison · Last updated April 2026
Claude Haiku 4.5 is cheaper than o4-mini at $1.00/1M/1M vs $1.10/1M/1M input tokens — a 1.1x cost difference. o4-mini scores higher on quality benchmarks (ELO 1350). Choose Claude Haiku 4.5 for cost-sensitive workloads; choose o4-mini for maximum quality.
Which is cheaper: o4-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 o4-mini. That is a 1.1x cost difference on input tokens. Output pricing follows a similar pattern: o4-mini charges $4.40/1M/1M vs $5.00/1M/1M for Claude Haiku 4.5.
Which has better quality: o4-mini or Claude Haiku 4.5?
Based on LMSYS Chatbot Arena rankings, o4-mini achieves a higher ELO score (1350 vs 1320), suggesting stronger performance on open-ended tasks. o4-mini excels at cheapest reasoning model in the openai lineup. Claude Haiku 4.5 is known for near-frontier intelligence at the lowest claude price tier.
Which should you choose: o4-mini or Claude Haiku 4.5?
- → Cheapest reasoning model in the OpenAI lineup
- → Strong performance on code and math for the price
- → 200K context window
- → Near-frontier intelligence at the lowest Claude price tier
- → Fastest Claude model
- → 200K context window
Frequently Asked Questions
Which is cheaper: o4-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: o4-mini or Claude Haiku 4.5?
o4-mini scores higher on the LMSYS Chatbot Arena with an ELO of 1350, suggesting better overall quality for most tasks.
Which has a larger context window: o4-mini or Claude Haiku 4.5?
Both o4-mini and Claude Haiku 4.5 have the same context window.
Should I choose o4-mini or Claude Haiku 4.5?
Choose Claude Haiku 4.5 if cost is the priority. Choose o4-mini if benchmark quality is most important. Consider your specific use case: o4-mini is best for reasoning and coding, while Claude Haiku 4.5 excels at fast-response and customer-support.
Is o4-mini or Claude Haiku 4.5 open source?
o4-mini is proprietary. Claude Haiku 4.5 is proprietary.