Key Takeaways
Claude Opus 4 wins:
- No clear advantages in compared metrics
Claude Opus 4.5 wins:
- Cheaper input tokens
- Cheaper output tokens
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Better at math
Price Advantage
Claude Opus 4.5
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 | Claude Opus 4.5 | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $15.00 | $5.00 | Claude Opus 4.5 |
| Output (per 1M tokens) | $75.00 | $25.00 | Claude Opus 4.5 |
| Cache Read (per 1M) | $1.50 | $0.50 | Claude Opus 4.5 |
| Cache Write (per 1M) | $18.75 | $6.25 | Claude Opus 4.5 |
Using a 3:1 input/output ratio, Claude Opus 4.5 is 67% cheaper overall.
Claude Opus 4 Providers
Amazon Bedrock $15.00 (Cheapest)
Google $15.00 (Cheapest)
Anthropic $15.00 (Cheapest)
Claude Opus 4.5 Providers
Amazon Bedrock $5.00 (Cheapest)
Google $5.00 (Cheapest)
Anthropic $5.00 (Cheapest)
Benchmark Comparison
8
Benchmarks Compared
0
Claude Opus 4 Wins
5
Claude Opus 4.5 Wins
Benchmark Scores
| Benchmark | Claude Opus 4 | Claude Opus 4.5 | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 22.2 | 43.1 | |
Coding Index Code generation & understanding | - | 42.9 | - |
Math Index Mathematical reasoning | 36.3 | 62.7 | |
MMLU Pro Academic knowledge | 86.0 | 88.9 | |
GPQA Graduate-level science | 70.1 | 81.0 | |
LiveCodeBench Competitive programming | 54.2 | 73.8 | |
Aider Real-world code editing | 72.0 | - | - |
AIME Competition math | 56.3 | - | - |
Claude Opus 4.5 significantly outperforms in coding benchmarks.
Cost vs Quality
X-axis:
Y-axis:
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Claude Opus 4
Other models
Context & Performance
Context Window
Claude Opus 4
200,000
tokens
Max output: 32,000 tokens
Claude Opus 4.5
200,000
tokens
Max output: 64,000 tokens
Speed Performance
| Metric | Claude Opus 4 | Claude Opus 4.5 | Winner |
|---|---|---|---|
| Tokens/second | 36.2 tok/s | 51.8 tok/s | |
| Time to First Token | 1.34s | 1.44s |
Claude Opus 4.5 responds 43% faster on average.
Capabilities
Feature Comparison
| Feature | Claude Opus 4 | Claude Opus 4.5 |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | Claude Opus 4 | Claude Opus 4.5 |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | Anthropic | Anthropic |
| Released | May 2025 | Nov 2025 |
Claude Opus 4 Modalities
Input
imagetextfile
Output
text
Claude Opus 4.5 Modalities
Input
fileimagetext
Output
text