Model Comparison
Llama 3.1 Instruct 405B
vs. Gemini 3.1 Pro Preview
Comparing 2 AI models · 12 benchmarks · Meta, Google
Recommended Pick
Go Gemini 3.1 Pro Preview 13 metric wins Strongest on: Value, Input price, Throughput
Best Value
Gemini 3.1 Pro Preview
100.0 value score
65.3 reasoning / $4.50/1M
Lowest Price
Gemini 3.1 Pro Preview
$2.00/1M input price
Best Reasoning
Gemini 3.1 Pro Preview
65.3 reasoning score
Blends available reasoning benchmarks
Best for Coding
Gemini 3.1 Pro Preview
55.5 coding index
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Best value
Gemini 3.1 Pro Preview has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
Gemini 3.1 Pro Preview is 1.4x cheaper on input tokens than Llama 3.1 Instruct 405B.
Speed gap
Gemini 3.1 Pro Preview generates about 3.0x as many tokens per second as Llama 3.1 Instruct 405B.
Reasoning gap
Gemini 3.1 Pro Preview leads Llama 3.1 Instruct 405B by 40.9 points on reasoning.
Coding gap
Gemini 3.1 Pro Preview leads Llama 3.1 Instruct 405B by 41.0 points on coding.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Llama 3.1 Instruct 405B
Meta
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 3.1 Pro Preview
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
Full Comparison
| Metric | Me Llama 3.1 Instruct 405B | Top Pick Go Gemini 3.1 Pro Preview |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $2.75/1M | $2.00/1M |
| Output Cost | $6.50/1M | $12.00/1M |
| Blended (3:1) | $3.69/1M | $4.50/1M |
| Specifications | ||
| Organization | Meta | |
| Release Date | Jul 23, 2024 | Feb 19, 2026 |
| Performance & Speed | ||
| Throughput | 44.0 tok/s | 133.5 tok/s |
| TTFT | 622ms | 28145ms |
| Latency | 622ms | 28145ms |
| Composite Indices | ||
| Value Score | 45.6 | 100.0 |
| Reasoning Score | 24.4 | 65.3 |
| Intelligence | 17.4 | 57.2 |
| Coding | 14.5 | 55.5 |
| Math | 3.0 | — |
| Standard Benchmarks | ||
| GPQA | 51.5% | 94.1% |
| MMLU Pro | 73.2% | — |
| HLE | 4.2% | 44.7% |
| LiveCodeBench | 30.5% | — |
| MATH 500 | 70.3% | — |
| AIME 2025 | 3.0% | — |
| AIME (Original) | 21.3% | — |
| SciCode | 29.9% | 58.9% |
| LCR | 24.3% | 72.7% |
| IFBench | 39.0% | 77.1% |
| TAU-bench v2 | 19.0% | 95.6% |
| TerminalBench Hard | 6.8% | 53.8% |
Key Takeaways
Gemini 3.1 Pro Preview offers the best value at $2.00/1M, making it ideal for high-volume applications and cost-conscious projects.
Gemini 3.1 Pro Preview has the strongest reasoning profile with a 65.3 reasoning score, combining the available reasoning-heavy benchmarks.
Gemini 3.1 Pro Preview reaches a 55.5 coding index, making it the top choice for software development and code generation tasks.
All models support context windows of ∞+ tokens, suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
Llama 3.1 Instruct 405B
- General-purpose AI
- Versatile applications
Gemini 3.1 Pro Preview
- Cost-sensitive applications
- High-volume processing
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
