Pairwise benchmark snapshot · Aug 1, 2026
In this head-to-head showdown, Claude Sonnet 4.5 delivers higher overall intelligence and human-preferred responses (Elo 1,524 vs 1,224), while Claude Sonnet 4.5 leads in SWE-bench software engineering benchmarks (70.1%), while Claude 3.5 Haiku is more budget-friendly at $4/1M per 1M output tokens. Review the complete breakdown below to determine which model best fits your performance and budget requirements.
8 direct benchmark disciplines evaluated across capability, speed, and cost
Previous cheap Claude. Haiku 4.5 is the current $1/$5 SKU.
Workhorse Anthropic model: most of Opus coding quality at a mid-tier price.
Δ 300 Arena Elo pts
140 tok/s
$4 / 1M output
Relative percentile scores computed across all active models in the benchmark catalog.
Comparing top Western standard models with China's leading frontier rival across 6 skill dimensions. Tap any spoke or dot to inspect.
Category wins across reasoning intelligence, generation speed, and token cost.
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
| Benchmark | Claude 3.5 Haiku | Claude Sonnet 4.5 | Advantage Delta |
|---|---|---|---|
| Preference Elo | +300 | ||
| Coding Elo | — | — | |
| LiveBench | +22.6% | ||
| SWE-bench | +33.9% | ||
| GPQA Diamond | +26.1% | ||
| Time to first token | +130 ms | ||
| Output speed | 140 tok/s | 88 tok/s | +52 tok/s |
| Input price | $0.8/1M | +$2.2/1M | |
| Output price | +$11/1M | ||
| Context window | — |
Simulate monthly production API costs in USD (US Dollar).
Claude 3.5 Haiku is estimated to save $242.00/month ($2,904/year).
Higher SWE-bench (70.1%).
Lower output list price ($4/1M).
Lower TTFT (110 ms).
Larger window (200k).
Both accept images. Defaulting to the higher-Elo side (Claude Sonnet 4.5).
| Target Workload | Recommended Pick | Evaluation Rationale |
|---|---|---|
| Repo / coding agents | Claude Sonnet 4.5 | Higher SWE-bench (70.1%). |
| High-volume chat | Claude 3.5 Haiku | Lower output list price ($4/1M). |
| Voice / low-latency UI | Claude 3.5 Haiku | Lower TTFT (110 ms). |
| Long-document RAG | Claude 3.5 Haiku | Larger window (200k). |
| Screenshots / vision | Claude Sonnet 4.5 | Both accept images. Defaulting to the higher-Elo side (Claude Sonnet 4.5). |
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