Model comparison
Claude Opus 4.5 vs Claude Opus 4.1
- Input
- $5.00
- Output
- $25.00
- Context
- 200K
- Released
- 2025-11-24
- Input
- $15 / 1M tokens
- Output
- $75 / 1M tokens
- Context
- 200K
- Released
- 2025-08-05
Claude Opus 4.5 scores higher on 1 of the 1 benchmarks both models report; Claude Opus 4.5 is cheaper on input tokens ($5 vs $15 per 1M, 3×).
Specs and pricing side by side
| Spec | Claude Opus 4.5 | Claude Opus 4.1 |
|---|---|---|
| Maker | Anthropic | Anthropicsame |
| Released | 2025-11-24 | 2025-08-05 |
| Context window | 200K | 200Ksame |
| Max output | 64K | 32K |
| Input price | $5.00 | $15 / 1M tokens |
| Output price | $25.00 | $75 / 1M tokens |
| Parameters | Undisclosed | not published |
| License | Proprietary | Proprietarysame |
| Weights | API only | API onlysame |
| Modalities | Text, Vision | Text, Visionsame |
| Knowledge cutoff | May 2025 | Reliable knowledge cutoff January 2025… |
Benchmarks both models report
| Benchmark | Claude Opus 4.5 | Claude Opus 4.1 |
|---|---|---|
| SWE-bench Verified | 80.9% | 74.5% |
Scores are as published by each maker or its cited source; harness, reasoning effort and date can differ between rows, so treat small gaps as ties. Sources are listed on each model page.
Which one should you pick?
Pick Claude Opus 4.5 if…
- You care about SWE-bench Verified (it scores higher on 1 shared benchmark).
- Cost matters: input tokens cost 3× less ($5 vs $15 per 1M).
- Your use case is: reach for it when you need a capable model for multi-step agentic coding and bug-fixing across real repositories.
Pick Claude Opus 4.1 if…
- Your use case is: agentic coding and autonomous multi-step software engineering tasks.
FAQ
Which is better, Claude Opus 4.5 or Claude Opus 4.1?
Claude Opus 4.5 scores higher on 1 of the 1 benchmarks both models report; Claude Opus 4.5 is cheaper on input tokens ($5 vs $15 per 1M, 3×). The better pick depends on whether you value benchmark scores, price per token, context length or openness for your workload.
How much cheaper is Claude Opus 4.5?
Claude Opus 4.5: $5.00 input, $25.00 output. Claude Opus 4.1: $15 / 1M tokens input, $75 / 1M tokens output (list API prices as published by each maker).
What are the context windows of Claude Opus 4.5 and Claude Opus 4.1?
Claude Opus 4.5 offers 200K with up to 64K output; Claude Opus 4.1 offers 200K with up to 32K output.
Is Claude Opus 4.5 newer than Claude Opus 4.1?
Claude Opus 4.5 was released 2025-11-24; Claude Opus 4.1 was released 2025-08-05.