Pairwise benchmark snapshot · Aug 17, 2026
In this head-to-head showdown, Claude Sonnet 4 delivers higher overall intelligence and human-preferred responses (Elo 1,455 vs 1,260), while Claude Sonnet 4 leads in SWE-bench software engineering benchmarks (62.8%), while Gemini 1.5 Pro is more budget-friendly at $5/1M per 1M output tokens, while Claude Sonnet 4 provides faster response streaming (92 tok/s). Review the complete breakdown below to determine which model best fits your performance and budget requirements.
First Sonnet 4 generation. Bridge between 3.5/3.7 and Sonnet 5.
First million-token Gemini Pro. Baseline for 1.5 vs 2.5 vs 3.x Pro.
Δ 195 Arena Elo pts
92 tok/s
$5 / 1M output
Relative percentile scores computed across all active models in the benchmark catalog.
Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.
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 Sonnet 4 | Gemini 1.5 Pro | Advantage Delta |
|---|---|---|---|
| Preference Elo | Claude Sonnet 4 (+195) | ||
| Coding Elo | — | — | |
| LiveBench | Claude Sonnet 4 (+14%) | ||
| SWE-bench | Claude Sonnet 4 (+24.8%) | ||
| GPQA Diamond | Claude Sonnet 4 (+18.4%) | ||
| Time to first token | Claude Sonnet 4 (+20 ms) | ||
| Output speed | 92 tok/s | 70 tok/s | Claude Sonnet 4 (+22 tok/s) |
| Input price | $1.25/1M | Gemini 1.5 Pro (+$1.75/1M) | |
| Output price | Gemini 1.5 Pro (+$10/1M) | ||
| Context window | Gemini 1.5 Pro (+1M) |
Simulate monthly production API costs in USD (US Dollar).
Gemini 1.5 Pro is estimated to save $211.25/month ($2,535/year).
Higher SWE-bench (62.8%).
Lower output list price ($5/1M).
Lower TTFT (220 ms).
Larger window (2M).
Both accept images. Defaulting to the higher-Elo side (Claude Sonnet 4).
| Target Workload | Recommended Pick | Evaluation Rationale |
|---|---|---|
| Repo / coding agents | Claude Sonnet 4 | Higher SWE-bench (62.8%). |
| High-volume chat | Gemini 1.5 Pro | Lower output list price ($5/1M). |
| Voice / low-latency UI | Claude Sonnet 4 | Lower TTFT (220 ms). |
| Long-document RAG | Gemini 1.5 Pro | Larger window (2M). |
| Screenshots / vision | Claude Sonnet 4 | Both accept images. Defaulting to the higher-Elo side (Claude Sonnet 4). |
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The real PNG is generated at /compare/claude-sonnet-4-vs-gemini-1-5-pro/opengraph-image for crawlers.
Verified head-to-head card
