Pairwise benchmark snapshot · Aug 16, 2026
This page compares Claude 3.7 Sonnet (Anthropic) and Claude Sonnet 4.5 (Anthropic) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, Claude Sonnet 4.5 is ahead by 162 points (1,524 vs 1,362; seed-bootstrap (Aug 1, 2026)). On SWE-bench coding, Claude 3.7 Sonnet resolves 70.3% versus 70.1% (seed-bootstrap (Aug 1, 2026)). Claude Sonnet 4.5 streams faster (88 tok/s) while Claude 3.7 Sonnet is the cheaper output token ($15/1M). Claude Sonnet 4.5 has the larger context window (1M tokens). Every cell below is a dated snapshot from a named public source — we do not invent missing scores, and we do not run SWE-bench ourselves.
Anthropic
Claude 3.7 SonnetHybrid-reasoning Sonnet from 2025. Kept for historical compare pages.
Anthropic
Claude Sonnet 4.5Workhorse Anthropic model: most of Opus coding quality at a mid-tier price.
Instant pairwise benchmark recalculation across 400+ LLMs
Category wins across intelligence, speed, and pricing efficiency.
Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy
Generation throughput and time to first token responsiveness
Cost per million tokens and max context window length
Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.
162 pts advantage
3 tok/s faster
Same token price
Simulate monthly production API costs based on published $/1M tokens.
Higher SWE-bench (70.3%).
Lower output list price ($15/1M).
Lower TTFT (240 ms).
Larger window (1M).
Both accept images. Defaulting to the higher-Elo side (Claude Sonnet 4.5).
| Target Workload | Recommended Pick | Evaluation Rationale |
|---|---|---|
| Repo / coding agents | Claude 3.7 Sonnet | Higher SWE-bench (70.3%). |
| High-volume chat | Claude 3.7 Sonnet | Lower output list price ($15/1M). |
| Voice / low-latency UI | Claude 3.7 Sonnet | Lower TTFT (240 ms). |
| Long-document RAG | Claude Sonnet 4.5 | Larger window (1M). |
| Screenshots / vision | Claude Sonnet 4.5 | Both accept images. Defaulting to the higher-Elo side (Claude Sonnet 4.5). |
Most of Opus 4.5 coding at a mid-tier price. Sonnet 5 replaced it as the buy; 4.5 remains a compare baseline.
2025 hybrid-reasoning Sonnet. Deprecated for buying, kept for old compare URLs and “what did 3.7 score?”
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The real PNG is generated at /compare/claude-3-7-sonnet-vs-claude-sonnet-4-5/opengraph-image for crawlers.
Verified head-to-head card
