prices synced 2026-07-28

GPT-5.5 Pro

OpenAI · Released Apr 2026

Compare

Highest-accuracy reasoning variant of GPT-5.5.

Strengths
OpenAI's highest-accuracy reasoning variant.
Best for
Mission-critical analysis where answer quality outweighs latency and cost.
Limitations
Slowest and priciest GPT-5.5 tier; wasteful for simple prompts.

Input / 1M

$30.00

Output / 1M

$180.00

Cached input / 1M

—

Context window

1M

Price history

Price per 1M tokens over timeOutput $180.00; Input $30.00 as of Apr 2026.$0$50.00$100.00$150.00$200.00Output on 24 Apr 2026: $180.00Out $180.00Input on 24 Apr 2026: $30.00In $30.00Apr 2026

Snapshots

Effective Input Output Cached in Note Source
24 Apr 2026 $30.00 $180.00 — openai.com/api/pricing

More from OpenAI

GPT-5.6 Luna

in $0.5 · out $3.00

GPT-5.6 Terra

in $1.25 · out $7.50

GPT-5.6 Sol

in $5.00 · out $30.00

GPT-5.5

in $5.00 · out $30.00
Report a problem