Side-by-side comparison
Gemini 2.5 Pro Preview 05-06 vs GPT-5.1 Chat
Google
Gemini 2.5 Pro Preview 05-06
👁 Vision
🔧 Tools
{} JSON
Input / 1M
$1.2500
Output / 1M
$10.0000
OpenAI
GPT-5.1 Chat
👁 Vision
🔧 Tools
{} JSON
Input / 1M
$1.2500
Output / 1M
$10.0000
| Gemini 2.5 Pro Preview 05-06 | GPT-5.1 Chat | |
|---|---|---|
| Provider | OpenAI | |
| Context window Maximum tokens (input + output) the model can process in a single request. Glossary → | 1,048,576 | 128,000 |
| 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 → | 1.2500 | 1.2500 |
| Output $ / 1M tokens Cost for tokens the model generates. Output is normally 3–5× pricier than input. Glossary → | 10.0000 | 10.0000 |
Frequently asked questions
Which is cheaper, Gemini 2.5 Pro Preview 05-06 or GPT-5.1 Chat?
Gemini 2.5 Pro Preview 05-06 is cheaper than GPT-5.1 Chat on a 50/50 input/output blend by about $0 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, Gemini 2.5 Pro Preview 05-06 or GPT-5.1 Chat?
Gemini 2.5 Pro Preview 05-06 has the larger context window at 1M tokens versus 128k tokens for GPT-5.1 Chat. That means Gemini 2.5 Pro Preview 05-06 can ingest about 8.2x as much text per request.
What is the difference between Gemini 2.5 Pro Preview 05-06 and GPT-5.1 Chat?
Gemini 2.5 Pro Preview 05-06 comes from Google; GPT-5.1 Chat comes from OpenAI. They differ in pricing, context window, and supported capabilities — see the side-by-side table on this page for the exact figures, refreshed nightly.