Model Comparison
Gemini 2.0 Flash Thinking Experimental (Dec '24)
vs. GPT-5.5 (xhigh)
Comparing 2 AI models · 8 benchmarks · Google, OpenAI
Recommended Pick
Go Gemini 2.0 Flash Thinking Experimental (Dec '24) 4 metric wins Strongest on: Input price, Output price, TTFT
Lowest Price
Gemini 2.0 Flash Thinking Experimental (Dec '24)
$0.00/1M input price
Best Reasoning
GPT-5.5 (xhigh)
66.0 reasoning score
Blends available reasoning benchmarks
Best for Coding
GPT-5.5 (xhigh)
59.1 coding index
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Price gap
Gemini 2.0 Flash Thinking Experimental (Dec '24) is ∞x cheaper on input tokens than GPT-5.5 (xhigh).
Reasoning gap
GPT-5.5 (xhigh) leads Gemini 2.0 Flash Thinking Experimental (Dec '24) by 35.9 points on reasoning.
Top-pick rationale
Gemini 2.0 Flash Thinking Experimental (Dec '24) wins 4 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.
Gemini 2.0 Flash Thinking Experimental (Dec '24)
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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GPT-5.5 (xhigh)
OpenAI
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
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Which answer was more useful?
Full Comparison
| Metric | Top Pick Go Gemini 2.0 Flash Thinking Experimental (Dec '24) | Op GPT-5.5 (xhigh) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.00/1M | $5.00/1M |
| Output Cost | $0.00/1M | $30.00/1M |
| Blended (3:1) | — | $11.25/1M |
| Specifications | ||
| Organization | OpenAI | |
| Release Date | Dec 19, 2024 | Apr 23, 2026 |
| Performance & Speed | ||
| Throughput | — | 66.5 tok/s |
| TTFT | — | 43813ms |
| Latency | — | 43813ms |
| Composite Indices | ||
| Value Score | — | 100.0 |
| Reasoning Score | 30.1 | 66.0 |
| Intelligence | 12.3 | 60.2 |
| Coding | — | 59.1 |
| Standard Benchmarks | ||
| GPQA | — | 93.5% |
| HLE | — | 44.3% |
| MATH 500 | 48.0% | — |
| SciCode | — | 56.1% |
| LCR | — | 74.3% |
| IFBench | — | 75.9% |
| TAU-bench v2 | — | 93.9% |
| TerminalBench Hard | — | 60.6% |
Key Takeaways
Gemini 2.0 Flash Thinking Experimental (Dec '24) offers the best value at $0.00/1M, making it ideal for high-volume applications and cost-conscious projects.
GPT-5.5 (xhigh) has the strongest reasoning profile with a 66.0 reasoning score, combining the available reasoning-heavy benchmarks.
GPT-5.5 (xhigh) reaches a 59.1 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
Gemini 2.0 Flash Thinking Experimental (Dec '24)
- Cost-sensitive applications
- High-volume processing
GPT-5.5 (xhigh)
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
