Pairwise benchmark snapshot · Aug 16, 2026
In this head-to-head showdown, Claude Sonnet 5 delivers higher overall intelligence and human-preferred responses (Elo 1,556 vs 1,495), while Gemini 3 Flash leads in SWE-bench software engineering benchmarks (75.8%), while Gemini 3 Flash is more budget-friendly at $0.6/1M per 1M output tokens. Review the complete breakdown below to determine which model best fits your performance and budget requirements.
9 direct benchmark disciplines evaluated across capability, speed, and cost
Anthropic workhorse. Official $2/$10 per 1M tokens made permanent on Aug 10 2026.
Fast Google frontier-adjacent model. Near-top official SWE-bench at a fraction of Opus price.
Currently comparing Claude Sonnet 5 vs Gemini 3 Flash. Alternative family tiers available.
Δ 61 Arena Elo pts
190 tok/s
$0.6 / 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 Sonnet 5 | Gemini 3 Flash | Advantage Delta |
|---|---|---|---|
| Preference Elo | +61 | ||
| Coding Elo | +52 | ||
| LiveBench | +3.6% | ||
| SWE-bench | +2% | ||
| GPQA Diamond | +4.4% | ||
| Time to first token | +80 ms | ||
| Output speed | 118 tok/s | 190 tok/s | +72 tok/s |
| Input price | $0.15/1M | +$1.85/1M | |
| Output price | $0.6/1M | +$9.4/1M | |
| Context window | — |
Simulate monthly production API costs in USD (US Dollar).
Gemini 3 Flash is estimated to save $205.75/month ($2,469/year).
Higher SWE-bench (75.8%).
Lower output list price ($0.6/1M).
Lower TTFT (95 ms).
Larger window (1M).
Both accept images. Defaulting to the higher-Elo side (Claude Sonnet 5).
| Target Workload | Recommended Pick | Evaluation Rationale |
|---|---|---|
| Repo / coding agents | Gemini 3 Flash | Higher SWE-bench (75.8%). |
| High-volume chat | Gemini 3 Flash | Lower output list price ($0.6/1M). |
| Voice / low-latency UI | Gemini 3 Flash | Lower TTFT (95 ms). |
| Long-document RAG | Claude Sonnet 5 | Larger window (1M). |
| Screenshots / vision | Claude Sonnet 5 | Both accept images. Defaulting to the higher-Elo side (Claude Sonnet 5). |
Usually Sonnet 5 vs Opus 5. Coding delta versus output $/1M. The workhorse question.
Aug 10 2026 made the $2/$10 list permanent. Sonnet is the default Claude unless the repo is actually on fire.
March 2026 speed SKU. Still a useful cheap-coding compare even after 3.6/3.7 Flash.
Most of Opus 4.5 coding at a mid-tier price. Sonnet 5 replaced it as the buy; 4.5 remains a compare baseline.
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Verified Head-to-Head Telemetry
compare · Aug 10, 2026
Sonnet vs Opus in 2026: same family, different invoice
price · Aug 10, 2026
Claude Sonnet 5 at $2/$10: the 2026 Anthropic workhorse
launch · Mar 16, 2026
Gemini 3 Flash: near-top official SWE-bench at a fraction of Opus
launch · Feb 18, 2026
Claude Sonnet 4.5 is the previous workhorse — still a valid vs baseline