Major Release Anthropic · Released
Claude Opus 4.5
What is Claude Opus 4.5?
Claude Opus 4.5 is a Major Release AI model from Anthropic, released on November 24, 2025. It has a 500K tokens context window, costs $15.00 per million input tokens, and scores 1468 on Chatbot Arena Elo. It is available via the company's API.
Anthropic's top-tier reasoning model for complex research and agents.
Anthropic's most capable model with breakthrough coding performance and major price reduction
Key features
- First model to break 80.9% on SWE-Bench Verified
- 67% price reduction vs previous Opus
- Extended reasoning capabilities
- Advanced coding performance
How much does Claude Opus 4.5 cost?
| Metric | Price |
|---|---|
| input per mtok | $15.00 |
| output per mtok | $75.00 |
| cached input per mtok | $1.50 |
| cache read per mtok | $0.50 |
Pricing data verified .
What context window does Claude Opus 4.5 have?
- Context window
- 500K tokens
- Max output
- 64K
- Input modalities
- text, image, PDF
- Output modalities
- text
How does Claude Opus 4.5 score on benchmarks?
| Benchmark | Score |
|---|---|
| SWE-bench Verified | 78.9% |
| MMLU | 92.8% |
| GPQA Diamond | 86.6% |
| AIME 2025 | 90.5% |
| MMLU-Pro | 89.5% |
| LiveCodeBench | 87.1% |
| HLE | 28.4% |
| SciCode | 49.5% |
| TAU2-bench | 89.5% |
| TerminalBench-Hard | 47.0% |
| IF-Bench | 58.0% |
| LiveCodeBench Reasoning | 74.0% |
| AA Intelligence Index | 49.7 |
| Chatbot Arena Elo | 1468 |
Benchmark scores verified .
How does Claude Opus 4.5 compare to Claude Opus 4.1?
- GPQA Diamond: 79.1% → 86.6% (+7.5pt)
- Input pricing: $15.00 → $15.00
- Context window: 200K tokens → 500K tokens