Side-by-side comparison
Claude Opus Latest vs Gemini 3.1 Pro Preview Custom Tools
Anthropic
Claude Opus Latest
👁 Vision
🔧 Tools
{} JSON
Input / 1M
$5.0000
Output / 1M
$25.0000
Google
Gemini 3.1 Pro Preview Custom Tools
👁 Vision
🔧 Tools
{} JSON
Input / 1M
$2.0000
Output / 1M
$12.0000
| Claude Opus Latest | Gemini 3.1 Pro Preview Custom Tools | |
|---|---|---|
| Provider | Anthropic | |
| Context window Maximum tokens (input + output) the model can process in a single request. Glossary → | 1,000,000 | 1,048,576 |
| Capabilities Optional capabilities the model advertises: vision (images), tools (function calling), json_mode (structured output). | vision, tools, json_mode | vision, tools, json_mode |
| Input $ / 1M tokens Cost for tokens you send (prompt + context). Cheaper side highlighted. Glossary → | 5.0000 | 2.0000 |
| Output $ / 1M tokens Cost for tokens the model generates. Output is normally 3–5× pricier than input. Glossary → | 25.0000 | 12.0000 |
Frequently asked questions
Which is cheaper, Claude Opus Latest or Gemini 3.1 Pro Preview Custom Tools?
Gemini 3.1 Pro Preview Custom Tools is cheaper than Claude Opus Latest on a 50/50 input/output blend by about $8 per 1M tokens. Exact savings depend on your input-vs-output ratio — use the cost calculator on this page for a workload-specific estimate.
Which has a larger context window, Claude Opus Latest or Gemini 3.1 Pro Preview Custom Tools?
Gemini 3.1 Pro Preview Custom Tools has the larger context window at 1M tokens versus 1M tokens for Claude Opus Latest. That means Gemini 3.1 Pro Preview Custom Tools can ingest about 1.0x as much text per request.
What is the difference between Claude Opus Latest and Gemini 3.1 Pro Preview Custom Tools?
Claude Opus Latest comes from Anthropic; Gemini 3.1 Pro Preview Custom Tools comes from Google. They differ in pricing, context window, and supported capabilities — see the side-by-side table on this page for the exact figures, refreshed nightly.