Model Comparison
o3-pro
vs. 3.5 (1210)
Comparing 2 AI models · 6 benchmarks · OpenAI, OpenChat
Recommended Pick
Opo3-pro4 metric winsStrongest on: Throughput, Reasoning, Intelligence
Lowest Price
3.5 (1210)
$0.00/1M input price
Best Reasoning
o3-pro
58.5 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
3.5 (1210) is ∞x cheaper on input tokens than o3-pro.
Reasoning gap
o3-pro leads 3.5 (1210) by 46.2 points on reasoning.
Top-pick rationale
o3-pro wins 4 measurable categories, including Throughput, Reasoning, Intelligence, GPQA.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
o3-pro
OpenAI
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
3.5 (1210)
OpenChat
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
Chat with leading AI models
Use Claude, ChatGPT, Gemini alongside with EU-Hosted Models like Deepseek, Qwen & Kimi.
EU-hosted inference
Servers in Germany & Finland. Designed to meet strict GDPR and ISO 27001 compliance requirements.
Full Comparison
| Metric | Top Pick Op o3-pro | Op 3.5 (1210) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $20.00/1M | $0.00/1M |
| Output Cost | $80.00/1M | $0.00/1M |
| Blended (3:1) | $35.00/1M | — |
| Specifications | ||
| Organization | OpenAI | OpenChat |
| Release Date | Jun 10, 2025 | Dec 18, 2023 |
| Performance & Speed | ||
| Throughput | 24.2 tok/s | — |
| TTFT | 67437ms | — |
| Latency | 67437ms | — |
| Composite Indices | ||
| Value Score | 100.0 | — |
| Reasoning Score | 58.5 | 12.3 |
| Intelligence | 32.5 | 3.0 |
| Standard Benchmarks | ||
| GPQA | 84.5% | 23.0% |
| MMLU Pro | — | 31.0% |
| HLE | — | 4.8% |
| LiveCodeBench | — | 11.5% |
| MATH 500 | — | 30.7% |
| AIME (Original) | — | 0.0% |
Key Takeaways
3.5 (1210) offers the best value at $0.00/1M,making it ideal for high-volume applications and cost-conscious projects.
o3-pro has the strongest reasoning profile with a 58.5 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
o3-pro
- Complex reasoning tasks
- Research & analysis
3.5 (1210)
- Cost-sensitive applications
- High-volume processing
