Claude Opus 4.5 vs Gemini 3.1 Pro preview
Claude Opus 4.5 vs Gemini 3.1 Pro preview: Gemini 3.1 Pro preview is cheaper by 60% on average. Claude Opus 4.5 from Azure AI Foundry (200,000-token context, reasoning, tool calls) vs. Gemini 3.1 Pro preview from Google Vertex AI (1,048,576-token context, reasoning, tool calls). Use Agent Command Center to A/B both in shadow mode and pick the winner per workload.
Side-by-side cost
Live workload comparison
Same workload run through both models. The cheaper one is highlighted.
3,000
01,048,576
400
065,536
5,000
01,000,000
At this workload, Gemini 3.1 Pro preview is 57% cheaper than Claude Opus 4.5 — a savings of $2,161/month ($25,933/year).
Production recipe — Agent Command Center
strategy: cost-optimized
primary:
model: gemini-3-1-pro-preview
provider: vertex-ai
fallback:
model: claude-opus-4-5
provider: azure-ai-foundry
shadow: { sample_rate: 0.05 } # mirror 5% of traffic to compare quality live| Claude Opus 4.5 | Gemini 3.1 Pro preview | |
|---|---|---|
| Input price | $5.00/M | $2.00/M |
| Output price | $25.00/M | $12.00/M |
| Context window | 200,000 | 1,048,576 |
| Max output | 64,000 | 65,536 |
| Function calling | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio input | — | ✓ |
| Reasoning | ✓ | ✓ |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Pricing verified | May 12, 2026 | May 12, 2026 |
Benchmark comparison
Side-by-side public benchmark scores. Greener bar = winner.
Chatbot Arena ELOgeneral
Claude Opus 4.5
1,472
Gemini 3.1 Pro preview
1,492