Claude Sonnet 4.5
Multimodal
#2Ï„-bench
by Anthropic
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About
Claude Sonnet 4.5, released by Anthropic in September 2025, is a large language model from the Claude 4.5 family that balances response quality and efficiency for coding, agentic tasks, and analytical work. It features a 200K token context window (extendable to 1M tokens in beta), 64K maximum output tokens, native image understanding, and extended thinking support. Sonnet 4.5 targets use cases that require a balance of throughput and reasoning depth, including code generation, data analysis, and multi-step agentic pipelines.
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Pricing Range
Input (per 1M)$3.00 -$3.00
Output (per 1M)$15.00 -$15.00
Providers3
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Timeline
ReleasedSep 29, 2025
Knowledge CutoffJan 1, 2025
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Specifications
Capabilities
Multimodal
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License & Family
License
Proprietary
Performance Overview
Performance metrics and category breakdown
Overall Performance
20 benchmarks
Average Score
56.2%
Best Score
98.0%
High Performers (80%+)
5Performance Metrics
Max Context Window
264.0KTop Categories
Knowledge
89.5%
Science
83.4%
Agents
68.6%
Coding
58.4%
Finance
54.5%
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All Benchmark Results for Claude Sonnet 4.5
Complete list of benchmark scores with detailed information
| TAU2-Bench Telecom | Agents | 98.00 | 98.0% | Self-reported | |
| MMMLU | Knowledge | 89.50 | 89.5% | Self-reported | |
| TAU2-Bench Retail | Agents | 86.20 | 86.2% | Self-reported | |
| Ï„-bench | Agents | 84.70 | 84.7% | Unverified | |
| GPQA Diamond | Science | 83.40 | 83.4% | Unverified | |
| SWE Bench Verified | Coding | 77.20 | 77.2% | Self-reported | |
| MMMU-Pro with Tools | Multimodal | 68.90 | 68.9% | Self-reported | |
| GDPVal AA ELO | Agents | 1276.00 | 63.8% | Self-reported | |
| MMMU-Pro | Multimodal | 63.40 | 63.4% | Self-reported | |
| OSWorld | Agents | 61.40 | 61.4% | Unverified |
Showing 1 to 10 of 20 benchmarks