Side-by-side comparison
Claude Sonnet 4.5 vs o3 Deep Research
Anthropic
Claude Sonnet 4.5
👁 Vision
🔧 Tools
{} JSON
Input / 1M
$3.0000
Output / 1M
$15.0000
OpenAI
o3 Deep Research
👁 Vision
🔧 Tools
{} JSON
Input / 1M
$10.0000
Output / 1M
$40.0000
| Claude Sonnet 4.5 | o3 Deep Research | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Context window Maximum tokens (input + output) the model can process in a single request. Glossary → | 1,000,000 | 200,000 |
| 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 → | 3.0000 | 10.0000 |
| Output $ / 1M tokens Cost for tokens the model generates. Output is normally 3–5× pricier than input. Glossary → | 15.0000 | 40.0000 |
Frequently asked questions
Which is cheaper, Claude Sonnet 4.5 or o3 Deep Research?
Claude Sonnet 4.5 is cheaper than o3 Deep Research on a 50/50 input/output blend by about $16 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 o3 Deep Research?
Claude Sonnet 4.5 has the larger context window at 1M tokens versus 200k tokens for o3 Deep Research. That means Claude Sonnet 4.5 can ingest about 5.0x as much text per request.
What is the difference between Claude Sonnet 4.5 and o3 Deep Research?
Claude Sonnet 4.5 comes from Anthropic; o3 Deep Research 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.