Key Takeaways
Llama 3.1 405B Instruct 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
- Supports vision
Price Advantage
Llama 3.1 405B Instruct
Benchmark Advantage
GPT-5.2 Pro
Context Window
GPT-5.2 Pro
Speed
GPT-5.2 Pro
Pricing Comparison
Price Comparison
| Metric | Llama 3.1 405B Instruct | GPT-5.2 Pro | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $4.00 | $21.00 | Llama 3.1 405B Instruct |
| Output (per 1M tokens) | $4.00 | $168.00 | Llama 3.1 405B Instruct |
Using a 3:1 input/output ratio, Llama 3.1 405B Instruct is 93% cheaper overall.
Llama 3.1 405B Instruct Providers
Hyperbolic $4.00 (Cheapest)
Google $5.00
GPT-5.2 Pro Providers
OpenAI $21.00 (Cheapest)
Benchmark Comparison
8
Benchmarks Compared
0
Llama 3.1 405B Instruct Wins
6
GPT-5.2 Pro Wins
Benchmark Scores
| Benchmark | Llama 3.1 405B Instruct | GPT-5.2 Pro | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 14.2 | 51.2 | |
Coding Index Code generation & understanding | 14.5 | 48.7 | |
Math Index Mathematical reasoning | 3.0 | 99.0 | |
MMLU Pro Academic knowledge | 73.2 | 87.4 | |
GPQA Graduate-level science | 51.5 | 90.3 | |
LiveCodeBench Competitive programming | 30.5 | 88.9 | |
Aider Real-world code editing | 66.2 | - | - |
AIME Competition math | 21.3 | - | - |
GPT-5.2 Pro significantly outperforms in coding benchmarks.
Cost vs Quality
X-axis:
Y-axis:
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Llama 3.1 405B Instruct
Other models
Context & Performance
Context Window
Llama 3.1 405B Instruct
131,000
tokens
GPT-5.2 Pro
400,000
tokens
Max output: 128,000 tokens
GPT-5.2 Pro has a 67% larger context window.
Speed Performance
| Metric | Llama 3.1 405B Instruct | GPT-5.2 Pro | Winner |
|---|---|---|---|
| Tokens/second | 25.2 tok/s | 98.3 tok/s | |
| Time to First Token | 0.79s | 46.57s |
GPT-5.2 Pro responds 291% faster on average.
Capabilities
Feature Comparison
| Feature | Llama 3.1 405B Instruct | 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 | Llama 3.1 405B Instruct | GPT-5.2 Pro |
|---|---|---|
| License | Open Source | Proprietary |
| Author | Meta-llama | OpenAI |
| Released | Jul 2024 | Dec 2025 |
Llama 3.1 405B Instruct Modalities
Input
text
Output
text
GPT-5.2 Pro Modalities
Input
imagetextfile
Output
text