Claude Opus 5 vs Gemini 3.1 Pro
Side-by-side comparison of API pricing, specs, benchmarks, and capabilities
| Specification |
by Anthropic
|
by Google
|
|---|---|---|
| Overview | ||
| Status | Current flagship | Current flagship |
| Released | Jul 24, 2026 | Nov 1, 2025 |
| Pricing per million tokens | ||
| Input | $5.00/Mtok | $2.00/Mtok |
| Output | $25.00/Mtok | $12.00/Mtok |
| Blended avg | $15.00/Mtok | $7.00/Mtok |
| Cached input | $0.500/Mtok | $0.200/Mtok |
| Specifications | ||
| Context window | 1M tokens | 2M tokens |
| Parameters | Proprietary | Proprietary |
| Speed (TPS) | — | — |
| Modalities | ||
| Input |
textimage
|
textimageaudiovideo
|
| Benchmarks source: Vellum LLM Leaderboard | ||
| Avg benchmark score | 77.8 | 74.8 |
| Perf / dollar | 5.2 | 10.7 |
| BrowseComp | 90.8 | 85.9 |
| Humanity's Last Exam | 64.7 | 44.4 |
| GPQA Diamond | — | 94.3 |
| Terminal-Bench 2.1 | — | 70.3 |
| MCP Atlas | — | 69.2 |
| OSWorld-Verified | — | 76.2 |
| ARC-AGI 2 | — | 77.1 |
| HumanEval | — | 80.6 |
| AutoBench | 26 | — |
| Independent composite scores each on its own scale — not part of the average above | ||
| AA Intelligence Index | 60.7 | 46.5 |
| AA-Omniscience Index (−100–100) | 31.3 | 32.9 |
| AA Agentic Index | 55.3 | — |
| GDPval-AA v2 | 1861.5 ELO | — |
| LMSYS Chatbot Arena | — | 1485.9 ELO |
| Providers | ||
| Available from |
Anthropic — $5.00/$25.00/Mtok
|
Google — $2.00/$12.00/Mtok
|
Cost at scale
1M tokens · 50/50 input/output| Volume | Claude Opus 5 | Gemini 3.1 Pro | Savings |
|---|---|---|---|
| 1M tokens | $15 | $7 | $8 (53.3%) |
| 10M tokens | $150 | $70 | $80 (53.3%) |
| 100M tokens | $1500 | $700 | $800 (53.3%) |
| 1000M tokens | $15000 | $7000 | $8000 (53.3%) |
The cheaper option here — Gemini 3.1 Pro costs $7.00/Mtok blended on Google.
Summary
Claude Opus 5 by Anthropic costs $5.00/Mtok input and $25.00/Mtok output, with a 1M-token context window. It supports text, image input.
Gemini 3.1 Pro by Google costs $2.00/Mtok input and $12.00/Mtok output, with a 2M-token context window. It supports text, image, audio, video input.
On a blended cost basis, Gemini 3.1 Pro is 53.3% cheaper than Claude Opus 5. It also has a larger context window.
On benchmarks, Claude Opus 5 scores higher (77.8 vs 74.8) on average. In terms of value, Gemini 3.1 Pro has better performance per dollar (10.7 vs 5.2).
Note: Pricing is per million tokens. Actual costs vary with usage patterns, prompt caching, and batch discounts. Always verify against official provider pricing pages.