Key Takeaways
Claude Sonnet 4.6 wins:
- Cheaper input tokens
- Cheaper output tokens
- Larger context window
- Has reasoning mode
GPT-5.2 Pro wins:
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Better at math
Price Advantage
Claude Sonnet 4.6
Benchmark Advantage
GPT-5.2 Pro
Context Window
Claude Sonnet 4.6
Speed
GPT-5.2 Pro
Pricing Comparison
Price Comparison
| Metric | Claude Sonnet 4.6 | GPT-5.2 Pro | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $3.00 | $21.00 | Claude Sonnet 4.6 |
| Output (per 1M tokens) | $15.00 | $168.00 | Claude Sonnet 4.6 |
| Cache Read (per 1M) | $300000.00 | N/A | Claude Sonnet 4.6 |
| Cache Write (per 1M) | $3750000.00 | N/A | Claude Sonnet 4.6 |
Using a 3:1 input/output ratio, Claude Sonnet 4.6 is 90% cheaper overall.
Claude Sonnet 4.6 Providers
Amazon Bedrock $3.00 (Cheapest)
Google $3.00 (Cheapest)
Anthropic $3.00 (Cheapest)
GPT-5.2 Pro Providers
OpenAI $21.00 (Cheapest)
Benchmark Comparison
6
Benchmarks Compared
0
Claude Sonnet 4.6 Wins
3
GPT-5.2 Pro Wins
Benchmark Scores
| Benchmark | Claude Sonnet 4.6 | GPT-5.2 Pro | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 44.3 | 51.2 | |
Coding Index Code generation & understanding | 46.4 | 48.7 | |
Math Index Mathematical reasoning | - | 99.0 | - |
MMLU Pro Academic knowledge | - | 87.4 | - |
GPQA Graduate-level science | 79.9 | 90.3 | |
LiveCodeBench Competitive programming | - | 88.9 | - |
GPT-5.2 Pro shows stronger mathematical reasoning abilities.
Cost vs Quality
X-axis:
Y-axis:
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Other models
Context & Performance
Context Window
Claude Sonnet 4.6
1,000,000
tokens
Max output: 128,000 tokens
GPT-5.2 Pro
400,000
tokens
Max output: 128,000 tokens
Claude Sonnet 4.6 has a 60% larger context window.
Speed Performance
| Metric | Claude Sonnet 4.6 | GPT-5.2 Pro | Winner |
|---|---|---|---|
| Tokens/second | 56.3 tok/s | 84.1 tok/s | |
| Time to First Token | 0.80s | 25.87s |
GPT-5.2 Pro responds 49% faster on average.
Capabilities
Feature Comparison
| Feature | Claude Sonnet 4.6 | 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 Sonnet 4.6 | GPT-5.2 Pro |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | Anthropic | OpenAI |
| Released | Feb 2026 | Dec 2025 |
Claude Sonnet 4.6 Modalities
Input
textimage
Output
text
GPT-5.2 Pro Modalities
Input
imagetextfile
Output
text