Model Comparison
GPT-3.5 Turbo
vs. Gemini 3.1 Pro Preview
Comparing 2 AI models · 9 benchmarks · OpenAI, Google
Recommended Pick
Op GPT-3.5 Turbo 7 metric wins Strongest on: Value, Input price, Output price
Best Value
GPT-3.5 Turbo
100.0 value score
27.6 reasoning / $0.75/1M
Lowest Price
GPT-3.5 Turbo
$0.50/1M 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
GPT-3.5 Turbo has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
GPT-3.5 Turbo is 4.0x cheaper on input tokens than Gemini 3.1 Pro Preview.
Speed gap
GPT-3.5 Turbo generates about 1.1x as many tokens per second as Gemini 3.1 Pro Preview.
Reasoning gap
Gemini 3.1 Pro Preview leads GPT-3.5 Turbo by 37.7 points on reasoning.
Coding gap
Gemini 3.1 Pro Preview leads GPT-3.5 Turbo by 44.8 points on coding.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
GPT-3.5 Turbo
OpenAI
TTFT
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Time
—
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
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Which answer was more useful?
Full Comparison
| Metric | Top Pick Op GPT-3.5 Turbo | Go Gemini 3.1 Pro Preview |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.50/1M | $2.00/1M |
| Output Cost | $1.50/1M | $12.00/1M |
| Blended (3:1) | $0.75/1M | $4.50/1M |
| Specifications | ||
| Organization | OpenAI | |
| Release Date | Nov 30, 2022 | Feb 19, 2026 |
| Performance & Speed | ||
| Throughput | 140.4 tok/s | 126.8 tok/s |
| TTFT | 951ms | 25467ms |
| Latency | 951ms | 25467ms |
| Composite Indices | ||
| Value Score | 100.0 | 39.5 |
| Reasoning Score | 27.6 | 65.3 |
| Intelligence | 9.0 | 57.2 |
| Coding | 10.7 | 55.5 |
| Standard Benchmarks | ||
| GPQA | 29.7% | 94.1% |
| MMLU Pro | 46.2% | — |
| HLE | — | 44.7% |
| MATH 500 | 44.1% | — |
| SciCode | — | 58.9% |
| LCR | — | 72.7% |
| IFBench | — | 77.1% |
| TAU-bench v2 | — | 95.6% |
| TerminalBench Hard | — | 53.8% |
Key Takeaways
GPT-3.5 Turbo offers the best value at $0.50/1M, 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
GPT-3.5 Turbo
- Cost-sensitive applications
- High-volume processing
Gemini 3.1 Pro Preview
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
