Side-by-side comparison
Claude Sonnet 4.5 vs Gemini 3.1 Pro Preview
Anthropic
Claude Sonnet 4.5
👁 Vision
🔧 Tools
{} JSON
Input / 1M
$3.0000
Output / 1M
$15.0000
Google
Gemini 3.1 Pro Preview
👁 Vision
🔧 Tools
{} JSON
Input / 1M
$2.0000
Output / 1M
$12.0000
| Claude Sonnet 4.5 | Gemini 3.1 Pro Preview | |
|---|---|---|
| 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 → | 3.0000 | 2.0000 |
| Output $ / 1M tokens Cost for tokens the model generates. Output is normally 3–5× pricier than input. Glossary → | 15.0000 | 12.0000 |
Frequently asked questions
Which is cheaper, Claude Sonnet 4.5 or Gemini 3.1 Pro Preview?
Gemini 3.1 Pro Preview is cheaper than Claude Sonnet 4.5 on a 50/50 input/output blend by about $2 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 Sonnet 4.5 or Gemini 3.1 Pro Preview?
Gemini 3.1 Pro Preview has the larger context window at 1M tokens versus 1M tokens for Claude Sonnet 4.5. That means Gemini 3.1 Pro Preview can ingest about 1.0x as much text per request.
What is the difference between Claude Sonnet 4.5 and Gemini 3.1 Pro Preview?
Claude Sonnet 4.5 comes from Anthropic; Gemini 3.1 Pro Preview 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.