Compare two models
Select any two models. Input, output, cached, and context rarely move together — the cheaper model on one line isn't always the cheaper one on the next.
Description
Anthropic's best balance of speed and intelligence. 1M context window. Sonnet pricing has held flat at $3/$15 across all 4.x releases.
OpenAI's frontier model for complex professional workloads. 1M token context, text + image input, native computer use.
I/O price /1M
$3.00/$15.00
$5.00/$30.00
Input /1M
$3.00
$5.00
Output /1M
$15.00
$30.00
Cached in /1M
$0.3
$0.5
Context
1M
1M
Δ input since launch
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—
Δ output since launch
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Released
Feb 2026
Apr 2026
Status
—
—
Provider
Anthropic
OpenAI