Which model is better: Claude 3.7 Sonnet or Claude 4.5 Sonnet?
Claude 3.7 Sonnet and Claude 4.5 Sonnet share identical input pricing at $3.00 per 1M tokens ($15.00 vs. $15.00 output). In terms of operational performance, Claude 4.5 Sonnet delivers lower response latency at 380ms TTFT (160ms faster than Claude 3.7 Sonnet) with 84 vs. 72 tok/s throughput. Claude 4.5 Sonnet leads coding evaluations at 75.8% SWE-bench Verified vs. 70.3% for Claude 3.7 Sonnet and 84.2% vs. 78.5% on GPQA Diamond.
Verified daily via automated API latency tests and official documentation.
Zero-Shot RAG Verified
Verified Performance & Unit Economics Delta (12 Dimensions)
Daily synchronized metrics across token pricing, prompt cache economics, latency, throughput, and 5 capability benchmarks.
Metric / Dimension
Claude 3.7 Sonnet
Claude 4.5 Sonnet
Net Delta / Advantage
Input Cost / 1M Tokens
$3.00
$3.00
Identical Pricing
Output Cost / 1M Tokens
$15.00
$15.00
Identical Output Pricing
Prompt Cache Read / 1M
$0.300
$0.300
Identical Cache Read Pricing
Prompt Cache Write / 1M
$3.75
$3.75
Identical Cache Write Pricing
Context Window (Max Output)
205k (64k out)
205k (64k out)
Equal Context Window
Avg TTFT Response Latency
540ms
380ms
Claude 4.5 Sonnet (160ms faster)
Generation Speed (Throughput)
72 tok/s
84 tok/s
Claude 4.5 Sonnet (+12 tok/s faster)
SWE-bench Verified (Coding)
70.3%
75.8%
Claude 4.5 Sonnet (+5.5% lead)
GPQA Diamond (PhD STEM)
78.5%
84.2%
Claude 4.5 Sonnet (+5.7% lead)
MMLU-Pro (Multi-Discipline)
88%
90.4%
Claude 4.5 Sonnet (+2.4% lead)
MATH-500 (Quantitative Logic)
96.2%
97.5%
Claude 4.5 Sonnet (+1.3% lead)
Inference Value Score (IVR)
54.3 / 100
56.5 / 100
Claude 4.5 Sonnet (+2.2 pts)
Interactive Monthly Token Economics & ROI Forecaster
Model production workloads across prompt, completion, and cached context tokens, or switch models on the fly.
Which is cheaper: Claude 3.7 Sonnet or Claude 4.5 Sonnet?
Both Claude 3.7 Sonnet and Claude 4.5 Sonnet share identical input pricing at $3.00/1M tokens.
Which model has lower TTFT latency and higher tok/s throughput: Claude 3.7 Sonnet or Claude 4.5 Sonnet?
Claude 4.5 Sonnet delivers faster first-token latency at 380ms TTFT (84 tok/s throughput) compared to 540ms TTFT (72 tok/s) for Claude 3.7 Sonnet.
How do Claude 3.7 Sonnet and Claude 4.5 Sonnet compare on SWE-bench coding and GPQA Diamond reasoning?
On SWE-bench Verified software engineering, Claude 3.7 Sonnet scores 70.3% versus 75.8% for Claude 4.5 Sonnet. On GPQA Diamond graduate-level STEM reasoning, Claude 3.7 Sonnet scores 78.5% versus 84.2% for Claude 4.5 Sonnet (and 96.2% vs 97.5% on MATH-500).
When should you choose Claude 3.7 Sonnet?
Choose Claude 3.7 Sonnet (Anthropic) for full-stack repository development, complex code refactoring, and agentic tool use with predictable prompt cache economics — offering a 204k context window, 540ms TTFT, and $3.00/1M input pricing ($0.300/1M cached reads).
When should you choose Claude 4.5 Sonnet?
Choose Claude 4.5 Sonnet (Anthropic) for end-to-end autonomous coding agents, complex multi-file debugging, browser/GUI automation, and high-precision technical writing — offering a 204k context window, 380ms TTFT, and $3.00/1M input pricing ($0.300/1M cached reads).
