Gemini 2.5 Pro Preview 05-06 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 Gemini 2.5 Pro Preview 05-06 if you need
- ✓Choose Grok 4.3 if you need strong complex multi-step reasoning with a documented intelligence index of 43.9.
- ✓Choose Grok 4.3 if you need fast output at 134.99 t/s and low cost of $2.5 per million tokens.
- ✓Choose Grok 4.3 if you need integrated real-time tool access alongside large-context document tasks.
- ✓Choose Grok 4.3 if you need helpful direct responses for text and image workloads.
Choose Grok 4.3 if you need
- ✓Choose Gemini 2.5 Pro Preview 05-06 if you need native processing of audio, video, and files in addition to text and images.
- ✓Choose Gemini 2.5 Pro Preview 05-06 if you need strong cross-modal reasoning across more than two modalities.
- ✓Choose Gemini 2.5 Pro Preview 05-06 if you need slightly larger context (1,048,576 tokens) and flexible file handling.
- ✓Choose Gemini 2.5 Pro Preview 05-06 if you need very large context window support for mixed-media inputs.
Verdict
Grok 4.3 leads on known intelligence (43.9), speed (134.99 t/s), and price ($2.5/M vs $10/M) while matching the ~1M context for text-image tasks. Gemini 2.5 Pro Preview 05-06 leads on native multi-modality support including audio and video plus flexible file handling. Grok 4.3 wins on cost-efficiency and measurable performance; Gemini wins on breadth of input types.
Gemini 2.5 Pro Preview 05-06 vs Grok 4.3: side by side
| Spec | Gemini 2.5 Pro Preview 05-06 | Grok 4.3 | Winner |
|---|---|---|---|
| Intelligence | — | 43.9 | Tie |
| Output speed | — | 135 t/s | Tie |
| Output price | $10.00/1M | $2.50/1M | Grok 4.3 |
| Context | 1049K | 1000K | Gemini 2.5 Pro Preview 05-06 |
| Params | — | — | Tie |
| Type | Proprietary | Proprietary | Tie |
| Provider | xAI | Tie |
Detailed analysis
Performance
Winner: Grok 4.3Grok 4.3 reports an intelligence index of 43.9 and emphasizes strong complex multi-step reasoning. Gemini 2.5 Pro Preview 05-06 lists no intelligence index but highlights strong cross-modal reasoning. The single numeric benchmark favors Grok 4.3.
Pricing
Winner: Grok 4.3Grok 4.3 costs $2.5 per million output tokens. Gemini 2.5 Pro Preview 05-06 costs $10 per million output tokens. Grok 4.3 is four times cheaper on the stated metric.
Speed & Context
Winner: Grok 4.3Grok 4.3 delivers 134.99 tokens per second with a 1,000,000-token context. Gemini 2.5 Pro Preview 05-06 lists no speed figure and offers 1,048,576 tokens. Grok 4.3 provides the only speed data and nearly identical context size.
Modalities
Winner: Gemini 2.5 Pro Preview 05-06Gemini 2.5 Pro Preview 05-06 natively supports text, images, audio, video, and files with flexible handling. Grok 4.3 focuses on complex text and image tasks. Gemini covers more input types per the listed strengths.
Gemini 2.5 Pro Preview 05-06
Pros
- +Very large context window
- +Native support for multiple modalities
- +Strong cross-modal reasoning
- +Flexible file handling
Cons
- –Preview version may show variability
- –High resource use with maximum context
- –Occasional modality-specific inconsistencies
Grok 4.3
Pros
- +Strong performance on complex multi-step reasoning
- +Large context window for document-level tasks
- +Helpful and direct response style
- +Integrated real-time tool access
Cons
- –Vision capabilities less mature than specialized models
- –Occasional over-refusal on edge-case queries
- –High computational cost for maximum context usage
Summary: Gemini 2.5 Pro Preview 05-06 vs Grok 4.3
Select Grok 4.3 when measurable speed, lower price, and documented reasoning performance matter most for text-image work. Select Gemini 2.5 Pro Preview 05-06 when native audio, video, and multi-file modality support are required. Both share proprietary status and roughly 1M-token context.
Frequently asked questions
Grok 4.3 is better on the available numeric metrics of intelligence, speed, and price; Gemini 2.5 Pro Preview 05-06 is better on modality breadth.