Model Comparison
Grok 3 mini Reasoning (high)
vs. Gemini 2.5 Flash Preview (Sep '25) (Reasoning)
Comparing 2 AI models · 12 benchmarks · SpaceXAI, Google
Recommended Pick
GoGemini 2.5 Flash Preview (Sep '25) (Reasoning)11 metric winsStrongest on: Input price, Output price, TTFT
Lowest Price
Gemini 2.5 Flash Preview (Sep '25) (Reasoning)
$0.00/1M input price
Best Reasoning
Grok 3 mini Reasoning (high)
67.8 reasoning score
Blends available reasoning benchmarks
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Price gap
Gemini 2.5 Flash Preview (Sep '25) (Reasoning) is ∞x cheaper on input tokens than Grok 3 mini Reasoning (high).
Reasoning gap
Grok 3 mini Reasoning (high) leads Gemini 2.5 Flash Preview (Sep '25) (Reasoning) by 13.3 points on reasoning.
Top-pick rationale
Gemini 2.5 Flash Preview (Sep '25) (Reasoning) wins 11 measurable categories, including Input price, Output price, TTFT, Latency.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Grok 3 mini Reasoning (high)
SpaceXAI
TTFT
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Time
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tok/s
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Tokens
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Cost
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Gemini 2.5 Flash Preview (Sep '25) (Reasoning)
TTFT
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Time
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tok/s
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Tokens
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Cost
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Which answer was more useful?
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Full Comparison
| Metric | Sp Grok 3 mini Reasoning (high) | Top Pick Go Gemini 2.5 Flash Preview (Sep '25) (Reasoning) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.30/1M | $0.00/1M |
| Output Cost | $0.50/1M | $0.00/1M |
| Blended (3:1) | $0.35/1M | — |
| Specifications | ||
| Organization | SpaceXAI | |
| Release Date | Feb 19, 2025 | Sep 25, 2025 |
| Performance & Speed | ||
| Throughput | 46.5 tok/s | — |
| TTFT | 635ms | — |
| Latency | 43651ms | — |
| Composite Indices | ||
| Value Score | 100.0 | — |
| Reasoning Score | 67.8 | 54.5 |
| Intelligence | 22.5 | 23.8 |
| Math | 84.7 | 78.3 |
| Standard Benchmarks | ||
| GPQA | 79.1% | 79.3% |
| MMLU Pro | 82.8% | 84.2% |
| HLE | 11.1% | 12.7% |
| LiveCodeBench | 69.6% | 71.3% |
| MATH 500 | 99.2% | — |
| AIME 2025 | 84.7% | 78.3% |
| AIME (Original) | 93.3% | — |
| SciCode | 40.6% | 40.5% |
| LCR | 50.3% | 64.3% |
| IFBench | 45.9% | 52.3% |
| TAU-bench v2 | 90.4% | 45.6% |
| TerminalBench Hard | 17.4% | 16.7% |
Key Takeaways
Gemini 2.5 Flash Preview (Sep '25) (Reasoning) offers the best value at $0.00/1M,making it ideal for high-volume applications and cost-conscious projects.
Grok 3 mini Reasoning (high) has the strongest reasoning profile with a 67.8 reasoning score,combining the available reasoning-heavy benchmarks.
All models support context windows of ∞+ tokens,suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
Grok 3 mini Reasoning (high)
- Complex reasoning tasks
- Research & analysis
Gemini 2.5 Flash Preview (Sep '25) (Reasoning)
- Cost-sensitive applications
- High-volume processing
