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...
Model details →OpenAI: o4 Mini vs SpaceXAI: Grok 4.5
OpenAI: o4 Mini wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
Grok 4.5 is SpaceXAI's smartest model with frontier performance on coding, knowledge work, and STEM.
Model details →Side-by-side comparison
| Capability | OpenAI: o4 Mini | SpaceXAI: Grok 4.5 | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 200K | 500K | 🏆 SpaceXAI: Grok 4.5 |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $1.10 | $2.00 | 🏆 OpenAI: o4 Mini |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $4.40 | $6.00 | 🏆 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 OpenAI: o4 Mini better than SpaceXAI: Grok 4.5?
OpenAI: o4 Mini wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between OpenAI: o4 Mini and SpaceXAI: Grok 4.5?
Input: $1.10 vs $2.00 per 1M tokens. Output: $4.40 vs $6.00 per 1M tokens.
What context windows do OpenAI: o4 Mini and SpaceXAI: Grok 4.5 support?
OpenAI: o4 Mini supports up to 200K tokens. SpaceXAI: Grok 4.5 supports up to 500K tokens.
Do both OpenAI: o4 Mini and SpaceXAI: Grok 4.5 support tool calling?
OpenAI: o4 Mini: yes. SpaceXAI: Grok 4.5: yes.
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