Pairwise benchmark snapshot · Aug 16, 2026
This page compares Gemini 3 Pro (Google) and OpenAI: o3 Mini (OpenAI) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, OpenAI: o3 Mini is ahead by 8 points (1,560 vs 1,552; seed-bootstrap (Aug 1, 2026)). On SWE-bench coding, OpenAI: o3 Mini resolves 78.5% versus 72.4% (seed-bootstrap (Aug 1, 2026)). Gemini 3 Pro streams faster (92 tok/s) while OpenAI: o3 Mini is the cheaper output token ($4.4/1M). Gemini 3 Pro has the larger context window (2M 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.
Google frontier multimodal model with a multi-million-token context window.
OpenAI
OpenAI: o3 MiniAuto-discovered from OpenRouter (openai/o3-mini). Preview until a second source matches.
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.
8 pts advantage
Equal tok/s
$0.60/1M cheaper
Simulate monthly production API costs based on published $/1M tokens.
OpenAI: o3 Mini is estimated to save $14.25/month ($171/year).
Higher SWE-bench (78.5%).
Lower output list price ($4.4/1M).
Lower TTFT (220 ms).
Larger window (2M).
Gemini 3 Pro is the side marked multimodal in the catalog.
| Target Workload | Recommended Pick | Evaluation Rationale |
|---|---|---|
| Repo / coding agents | OpenAI: o3 Mini | Higher SWE-bench (78.5%). |
| High-volume chat | OpenAI: o3 Mini | Lower output list price ($4.4/1M). |
| Voice / low-latency UI | Gemini 3 Pro | Lower TTFT (220 ms). |
| Long-document RAG | Gemini 3 Pro | Larger window (2M). |
| Screenshots / vision | Gemini 3 Pro | Gemini 3 Pro is the side marked multimodal in the catalog. |
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