Reka Flash (Sep '24) vs Gemini 3.1 Pro Preview: Which AI Model Is Better?

Updated March 26, 2026· Based on independent benchmark data

Quick Verdict

Gemini 3.1 Pro Preview leads in intelligence with a score of 57.2 vs 12.0. Reka Flash (Sep '24) is 10.0x cheaper at $0.20/1M tokens vs $2.00/1M. For speed, Gemini 3.1 Pro Preview wins at 113 tok/s vs 85 tok/s.

Head-to-Head Comparison

Metric	Reka Flash (Sep '24)	Gemini 3.1 Pro Preview
Intelligence Score	12.0	57.2
Coding Score	N/A	55.5
Math Score	N/A	N/A
Speed (tok/s)	85 tok/s	113 tok/s
Latency (TTFT)	1.26s	23.84s
Input Price / 1M tokens	$0.20	$2.00
Output Price / 1M tokens	$0.80	$12
Context Window	N/A	1.0M

Detailed Analysis

Intelligence & Quality

Gemini 3.1 Pro Preview outperforms Reka Flash (Sep '24) on the intelligence index with a score of 57.2 compared to 12.0.

Speed & Latency

Gemini 3.1 Pro Preview generates output significantly faster at 113 tok/s compared to Reka Flash (Sep '24)'s 85 tok/s, making it 1.3x faster for streaming responses. Time to first token is 1.26s for Reka Flash (Sep '24) vs 23.84s for Gemini 3.1 Pro Preview, which affects perceived responsiveness in interactive applications.

Pricing

Reka Flash (Sep '24) is more affordable at $0.20/1M input tokens ($0.80/1M output), while Gemini 3.1 Pro Preview costs $2.00/1M input ($12/1M output). That makes Gemini 3.1 Pro Preview 10.0x more expensive per token, which can add up significantly at scale. For a typical workload of 100 requests per day at 2,000 tokens each, Reka Flash (Sep '24) would cost approximately $1.20/month vs $12.00/month for Gemini 3.1 Pro Preview in input costs alone.

Best Use Cases

Choose Reka Flash (Sep '24) when you need lower cost. Choose Gemini 3.1 Pro Preview when you need higher intelligence (57.2), faster output (113 tok/s).

Choose Reka Flash (Sep '24) if:

✓You want lower latency (1.26s vs 23.84s TTFT)
✓Budget is a concern ($0.20/1M vs $2.00/1M)

Choose Gemini 3.1 Pro Preview if:

✓You need higher intelligence (score: 57.2 vs 12.0)
✓You need faster throughput (113 tok/s vs 85 tok/s)
✓You need image understanding (Supports image input)

Frequently Asked Questions

Which is cheaper, Reka Flash (Sep '24) or Gemini 3.1 Pro Preview?

Reka Flash (Sep '24) is cheaper at $0.20/1M input tokens vs $2.00/1M for Gemini 3.1 Pro Preview.

Is Reka Flash (Sep '24) faster than Gemini 3.1 Pro Preview?

Gemini 3.1 Pro Preview is faster, producing output at 113 tok/s compared to Reka Flash (Sep '24)'s 85 tok/s.

Can Reka Flash (Sep '24) process images?

No, Reka Flash (Sep '24) does not support image input. However, Gemini 3.1 Pro Preview does support images.

Should I use Reka Flash (Sep '24) or Gemini 3.1 Pro Preview?

It depends on your priorities. Gemini 3.1 Pro Preview scores higher on intelligence (57.2), but Reka Flash (Sep '24) may be better for specific use cases like budget-conscious projects or speed-critical applications.

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View Reka Flash (Sep '24)details →View Gemini 3.1 Pro Previewdetails →Full pricing comparison →

Data last synced: March 26, 2026