GPT-5.4 Mini vs Grok 4.3
A side-by-side comparison of two multimodal models — real specs, pricing, strengths and weaknesses, and a clear verdict on which to choose. Kept current by our agents.
Quick verdict: which should you choose?
Choose GPT-5.4 Mini if you need
- ✓Choose GPT-5.4 Mini if you need native support for files, images, and text in flexible multimodal workflows.
- ✓Choose GPT-5.4 Mini if you need higher intelligence (48.9) and faster output (183.23 t/s) for document-heavy tasks.
- ✓Choose GPT-5.4 Mini if you need a 400k context window paired with strong multimodal processing.
- ✓Choose GPT-5.4 Mini if you need OpenAI's proprietary multimodal capabilities without maximum context demands.
Choose Grok 4.3 if you need
- ✓Choose Grok 4.3 if you need a 1M-token context for large-scale document-level tasks.
- ✓Choose Grok 4.3 if you need lower pricing at $2.5 per 1M tokens and strong complex multi-step reasoning.
- ✓Choose Grok 4.3 if you need integrated real-time tool access alongside helpful response style.
- ✓Choose Grok 4.3 if you need maximum context size even when vision is secondary.
Verdict
GPT-5.4 Mini leads on intelligence (48.9 vs 43.9) and output speed (183.23 t/s vs 143.92 t/s) while offering native multimodal file/image/text support, making it stronger for high-volume document workflows. Grok 4.3 counters with a much larger 1M-token context and lower price ($2.5 vs $4.5 per 1M tokens), suiting complex multi-step reasoning tasks that benefit from extended context. Neither dominates outright; the choice hinges on whether speed and multimodal flexibility or context size and cost matter most.
GPT-5.4 Mini vs Grok 4.3: side by side
| Spec | GPT-5.4 Mini | Grok 4.3 | Winner |
|---|---|---|---|
| Intelligence | 40 | 35.4 | GPT-5.4 Mini |
| Output speed | 170 t/s | 126 t/s | GPT-5.4 Mini |
| Output price | $4.50/1M | $2.50/1M | Grok 4.3 |
| Context | 400K | 1000K | Grok 4.3 |
| Params | — | — | Tie |
| Provider | OpenAI | xAI | Tie |
Detailed analysis
Intelligence
Winner: GPT-5.4 MiniGPT-5.4 Mini scores higher on intelligence_index at 48.9 compared to Grok 4.3's 43.9. This edge aligns with its strengths in native multimodal processing for document tasks. Grok 4.3 instead emphasizes complex multi-step reasoning in its listed strengths.
Speed
Winner: GPT-5.4 MiniGPT-5.4 Mini delivers faster output at 183.23 t/s versus Grok 4.3's 143.92 t/s. Its limitations note that long contexts can still increase latency. Grok 4.3 does not list speed as a strength.
Pricing
Winner: Grok 4.3Grok 4.3 costs $2.5 per 1M tokens, undercutting GPT-5.4 Mini's $4.5 per 1M tokens. This makes Grok 4.3 more economical for high-volume use. Both are proprietary models from their respective providers.
Context Window
Winner: Grok 4.3Grok 4.3 provides a 1M-token context versus GPT-5.4 Mini's 400k tokens. Both models list large context as a strength for document-level work. Grok 4.3 notes higher computational cost at maximum context usage.
GPT-5.4 Mini
Pros
- +Very large context window
- +Native support for files, images, and text
- +Flexible multimodal workflows
Cons
- –Mini size may reduce depth on complex reasoning
- –Performance depends on input quality across modalities
- –Long contexts can increase latency
Grok 4.3
Pros
- +Strong performance on complex multi-step reasoning
- +Large context window for document-level tasks
- +Helpful and direct response style
Cons
- –Vision capabilities less mature than specialized models
- –Occasional over-refusal on edge-case queries
- –High computational cost for maximum context usage
Summary: GPT-5.4 Mini vs Grok 4.3
Select GPT-5.4 Mini when intelligence, speed, and native multimodal flexibility are priorities. Opt for Grok 4.3 when larger context and lower cost are decisive. The models trade off different strengths without one clear overall winner.
Frequently asked questions
GPT-5.4 Mini is better on intelligence and speed while Grok 4.3 is better on context size and price; the better choice depends on specific needs for multimodal speed versus extended context.