Claude Haiku 4.5 is Anthropic’s fastest and most efficient model, delivering near-frontier intelligence at a fraction of the cost and latency of larger Claude models. Matching Claude Sonnet 4’s performance across reasoning, coding, and comp…
Model details →Anthropic: Claude Haiku 4.5 vs OpenAI: o4 Mini
Anthropic: Claude Haiku 4.5 and OpenAI: o4 Mini are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
OpenAI o4-mini is a compact reasoning model in the o-series, optimized for fast, cost-efficient performance while retaining strong multimodal and agentic capabilities. It supports tool use and demonstrates competitive reasoning and coding p…
Model details →Side-by-side comparison
| Capability | Anthropic: Claude Haiku 4.5 | OpenAI: o4 Mini | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 200K | 200K | Tie |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $1.00 | $1.10 | 🏆 Anthropic: Claude Haiku 4.5 |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $5.00 | $4.40 | 🏆 OpenAI: o4 Mini |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Anthropic: Claude Haiku 4.5 better than OpenAI: o4 Mini?
Anthropic: Claude Haiku 4.5 and OpenAI: o4 Mini are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
What's the price difference between Anthropic: Claude Haiku 4.5 and OpenAI: o4 Mini?
Input: $1.00 vs $1.10 per 1M tokens. Output: $5.00 vs $4.40 per 1M tokens.
What context windows do Anthropic: Claude Haiku 4.5 and OpenAI: o4 Mini support?
Anthropic: Claude Haiku 4.5 supports up to 200K tokens. OpenAI: o4 Mini supports up to 200K tokens.
Do both Anthropic: Claude Haiku 4.5 and OpenAI: o4 Mini support tool calling?
Anthropic: Claude Haiku 4.5: yes. OpenAI: o4 Mini: yes.