Key Takeaways
Claude Opus 4.5 wins:
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Better at math
- Supports vision
- Has reasoning mode
Llama 3.1 405B Instruct wins:
- Cheaper input tokens
- Cheaper output tokens
Price Advantage
Llama 3.1 405B Instruct
Benchmark Advantage
Claude Opus 4.5
Context Window
Claude Opus 4.5
Speed
Claude Opus 4.5
Pricing Comparison
Price Comparison
| Metric | Claude Opus 4.5 | Llama 3.1 405B Instruct | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $5.00 | $0.90 | Llama 3.1 405B Instruct |
| Output (per 1M tokens) | $25.00 | $0.90 | Llama 3.1 405B Instruct |
| Cache Read (per 1M) | $0.50 | $0.45 | Llama 3.1 405B Instruct |
| Cache Write (per 1M) | $6.25 | N/A | Claude Opus 4.5 |
Using a 3:1 input/output ratio, Llama 3.1 405B Instruct is 91% cheaper overall.
Claude Opus 4.5 Providers
No provider data available
Llama 3.1 405B Instruct Providers
No provider data available
Benchmark Comparison
8
Benchmarks Compared
6
Claude Opus 4.5 Wins
0
Llama 3.1 405B Instruct Wins
Benchmark Scores
| Benchmark | Claude Opus 4.5 | Llama 3.1 405B Instruct | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 43.1 | 17.4 | |
Coding Index Code generation & understanding | 42.9 | 14.5 | |
Math Index Mathematical reasoning | 62.7 | 3.0 | |
MMLU Pro Academic knowledge | 88.9 | 73.2 | |
GPQA Graduate-level science | 81.0 | 51.5 | |
LiveCodeBench Competitive programming | 73.8 | 30.5 | |
Aider Real-world code editing | - | 66.2 | - |
AIME Competition math | - | 21.3 | - |
Claude Opus 4.5 significantly outperforms in coding benchmarks.
Cost vs Quality
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Claude Opus 4.5
Other models
Context & Performance
Context Window
Claude Opus 4.5
200,000
tokens
Llama 3.1 405B Instruct
131,000
tokens
Claude Opus 4.5 has a 35% larger context window.
Speed Performance
| Metric | Claude Opus 4.5 | Llama 3.1 405B Instruct | Winner |
|---|---|---|---|
| Tokens/second | 52.5 tok/s | 30.7 tok/s | |
| Time to First Token | 1.57s | 0.74s |
Claude Opus 4.5 responds 71% faster on average.
Capabilities
Feature Comparison
| Feature | Claude Opus 4.5 | Llama 3.1 405B Instruct |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | Claude Opus 4.5 | Llama 3.1 405B Instruct |
|---|---|---|
| License | Proprietary | Open Source |
| Author | Anthropic | Meta-llama |
| Released | Nov 2025 | Jul 2024 |
Claude Opus 4.5 Modalities
Input
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Output
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Llama 3.1 405B Instruct Modalities
Input
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Output
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