Side-by-side comparison
GPT-5.4 Image 2 vs Claude Sonnet 4.5
OpenAI
GPT-5.4 Image 2
👁 Vision
{} JSON
Input / 1M
$8.0000
Output / 1M
$15.0000
Anthropic
Claude Sonnet 4.5
👁 Vision
🔧 Tools
{} JSON
Input / 1M
$3.0000
Output / 1M
$15.0000
| GPT-5.4 Image 2 | Claude Sonnet 4.5 | |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Context window Maximum tokens (input + output) the model can process in a single request. Glossary → | 272,000 | 1,000,000 |
| Capabilities Optional capabilities the model advertises: vision (images), tools (function calling), json_mode (structured output). | vision, json_mode | vision, tools, json_mode |
| Input $ / 1M tokens Cost for tokens you send (prompt + context). Cheaper side highlighted. Glossary → | 8.0000 | 3.0000 |
| Output $ / 1M tokens Cost for tokens the model generates. Output is normally 3–5× pricier than input. Glossary → | 15.0000 | 15.0000 |
Frequently asked questions
Which is cheaper, GPT-5.4 Image 2 or Claude Sonnet 4.5?
Claude Sonnet 4.5 is cheaper than GPT-5.4 Image 2 on a 50/50 input/output blend by about $2.5 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, GPT-5.4 Image 2 or Claude Sonnet 4.5?
Claude Sonnet 4.5 has the larger context window at 1M tokens versus 272k tokens for GPT-5.4 Image 2. That means Claude Sonnet 4.5 can ingest about 3.7x as much text per request.
What is the difference between GPT-5.4 Image 2 and Claude Sonnet 4.5?
GPT-5.4 Image 2 comes from OpenAI; Claude Sonnet 4.5 comes from Anthropic. They differ in pricing, context window, and supported capabilities — see the side-by-side table on this page for the exact figures, refreshed nightly.