o4-mini-deep-research is OpenAI's faster, more affordable deep research model—ideal for tackling complex, multi-step research tasks. Note: This model always uses the 'web_search' tool which adds additional cost.
Model details →OpenAI: o4 Mini Deep Research vs xAI: Grok 4
OpenAI: o4 Mini Deep Research wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
Grok 4 is xAI's latest reasoning model with a 256k context window. It supports parallel tool calling, structured outputs, and both image and text inputs. Note that reasoning is not exposed, reasoning cannot be disabled, and the reasoning ef…
Model details →Side-by-side comparison
| Capability | OpenAI: o4 Mini Deep Research | xAI: Grok 4 | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 200K | 256K | 🏆 xAI: Grok 4 |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $2.00 | $3.00 | 🏆 OpenAI: o4 Mini Deep Research |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $8.00 | $15.00 | 🏆 OpenAI: o4 Mini Deep Research |
| 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 Deep Research better than xAI: Grok 4?
OpenAI: o4 Mini Deep Research 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 Deep Research and xAI: Grok 4?
Input: $2.00 vs $3.00 per 1M tokens. Output: $8.00 vs $15.00 per 1M tokens.
What context windows do OpenAI: o4 Mini Deep Research and xAI: Grok 4 support?
OpenAI: o4 Mini Deep Research supports up to 200K tokens. xAI: Grok 4 supports up to 256K tokens.
Do both OpenAI: o4 Mini Deep Research and xAI: Grok 4 support tool calling?
OpenAI: o4 Mini Deep Research: yes. xAI: Grok 4: yes.