Claude Opus 4.5 Nano: pricing, context window and benchmarks
Claude Opus 4.5 Nano is a multimodal model from Anthropic. It offers a 32,768-token context window, costs $9.38 per million input tokens and $36.06 per million output tokens, and averages 73.3 across the index's benchmark suite.
Pricing
Claude Opus 4.5 Nano costs $9.38 per million input tokens and $36.06 per million output tokens. A blended 3:1 input-to-output mix works out to about $16.05 per million tokens. Cached input is listed at $1.13 per million tokens.
| Item | Price | Notes |
|---|---|---|
| Input | $9.38 | per 1M tokens |
| Output | $36.06 | per 1M tokens |
| Cached input | $1.13 | per 1M tokens |
| Blended 3:1 | $16.05 | estimate per 1M tokens |
| 1M in + 1M out | $45.44 | estimate |
Benchmarks
Scores below are modelled estimates on a 0–100 scale. Use them to compare relative position, not as official vendor results.
| Benchmark | Score | Rank | Percentile | Relative |
|---|---|---|---|---|
| MMLU-Pro | 76.1 | 300 | 50th | |
| GPQA Diamond | 69.4 | 281 | 53th | |
| SWE-bench Verified | 62.2 | 273 | 55th | |
| HumanEval | 75.5 | 334 | 44th | |
| MATH-500 | 77.2 | 272 | 55th | |
| AIME 2025 | 71.4 | 229 | 62th | |
| LiveCodeBench | 65.0 | 293 | 51th | |
| IFEval | 79.7 | 337 | 44th | |
| TruthfulQA | 78.1 | 252 | 58th | |
| HellaSwag | 82.1 | 344 | 43th | |
| MMMU | 69.2 | 322 | 46th | |
| Arena Elo | 1373.3 | 305 | 49th |
What Claude Opus 4.5 Nano is good for
Claude Opus 4.5 Nano is a general-purpose model in the index. It handles text generation, summarization and question answering, and it can be a sensible default when you need a balance of quality, price and context. At $9.38 per million input tokens with a 32,768-token window, check its benchmark profile against the specific task before committing.
Strengths
- Accepts more than text, including image input where the provider supports it.
Trade-offs
- Proprietary licence: you cannot download the weights or self-host the model.
- Premium input pricing at $9.38 per million tokens.
How it compares
| Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|
| Claude Opus 4.5 Nano | Anthropic | 32768 | $9.38 | 73.3 |
| DBRX | Databricks | 65536 | $3.29 | 73.3 |
| Llama 3 Modal Chat | Modal | 65536 | $3.55 | 73.3 |
| Firefunction Max | Fireworks AI | 32768 | $9.12 | 73.2 |
| Gemini 3 Pro Nano | Google DeepMind | 8192 | $9.11 | 73.2 |
| Llama 3 Baseten Chat | Baseten | 200000 | $3.55 | 73.2 |
FAQ
How much does Claude Opus 4.5 Nano cost?
Claude Opus 4.5 Nano is listed at $9.38 per million input tokens and $36.06 per million output tokens. Cached input is $1.13 per million tokens. A blended 3:1 input-to-output mix is about $16.05 per million tokens.
What is the context window of Claude Opus 4.5 Nano?
Claude Opus 4.5 Nano has a context window of 32,768 tokens and can emit up to 32,768 output tokens per request in this index.
Is Claude Opus 4.5 Nano open weights?
No. Claude Opus 4.5 Nano is a proprietary model with a proprietary licence, so you cannot download the weights.
How does Claude Opus 4.5 Nano score on benchmarks?
Claude Opus 4.5 Nano averages 73.3 across the scored benchmarks in this index, ranking #292 of 600 models. Its strongest relative result is Arena Elo at 1373.3.
What is Claude Opus 4.5 Nano best for?
Claude Opus 4.5 Nano is a general-purpose model in the index. It handles text generation, summarization and question answering, and it can be a sensible default when you need a balance of quality, price and context. At $9.38 per million input tokens with a 32,768-token window, check its benchmark profile against the specific task before committing.