Key Takeaways
Claude 3.5 Sonnet wins:
- Cheaper input tokens
- Cheaper output tokens
GPT-5.2 Pro wins:
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Better at math
Price Advantage
Claude 3.5 Sonnet
Benchmark Advantage
GPT-5.2 Pro
Context Window
GPT-5.2 Pro
Speed
GPT-5.2 Pro
Pricing Comparison
Price Comparison
| Metric | Claude 3.5 Sonnet | GPT-5.2 Pro | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $6.00 | $21.00 | Claude 3.5 Sonnet |
| Output (per 1M tokens) | $30.00 | $168.00 | Claude 3.5 Sonnet |
Using a 3:1 input/output ratio, Claude 3.5 Sonnet is 79% cheaper overall.
Claude 3.5 Sonnet Providers
Vercel $3.00 (Cheapest)
Amazon Bedrock $6.00
GPT-5.2 Pro Providers
OpenAI $21.00 (Cheapest)
Benchmark Comparison
8
Benchmarks Compared
0
Claude 3.5 Sonnet Wins
5
GPT-5.2 Pro Wins
Benchmark Scores
| Benchmark | Claude 3.5 Sonnet | GPT-5.2 Pro | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 15.9 | 51.2 | |
Coding Index Code generation & understanding | 30.2 | 48.7 | |
Math Index Mathematical reasoning | - | 99.0 | - |
MMLU Pro Academic knowledge | 77.2 | 87.4 | |
GPQA Graduate-level science | 59.9 | 90.3 | |
LiveCodeBench Competitive programming | 38.1 | 88.9 | |
Aider Real-world code editing | 84.2 | - | - |
AIME Competition math | 15.7 | - | - |
GPT-5.2 Pro significantly outperforms in coding benchmarks.
Cost vs Quality
X-axis:
Y-axis:
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Claude 3.5 Sonnet
Other models
Context & Performance
Context Window
Claude 3.5 Sonnet
200,000
tokens
Max output: 8,192 tokens
GPT-5.2 Pro
400,000
tokens
Max output: 128,000 tokens
GPT-5.2 Pro has a 50% larger context window.
Speed Performance
| Metric | Claude 3.5 Sonnet | GPT-5.2 Pro | Winner |
|---|---|---|---|
| Tokens/second | 0.0 tok/s | 98.3 tok/s | |
| Time to First Token | 0.00s | 46.57s |
GPT-5.2 Pro responds Infinity% faster on average.
Capabilities
Feature Comparison
| Feature | Claude 3.5 Sonnet | GPT-5.2 Pro |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | Claude 3.5 Sonnet | GPT-5.2 Pro |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | Anthropic | OpenAI |
| Released | Oct 2024 | Dec 2025 |
Claude 3.5 Sonnet Modalities
Input
textimagefile
Output
text
GPT-5.2 Pro Modalities
Input
imagetextfile
Output
text