GPT-5.5
OpenAI · Frontier
OpenAI's frontier model for complex professional workloads. 1M token context, text + image input, native computer use.
- Strengths
- Frontier multimodal model with a 1M-token context and native computer use.
- Best for
- Complex professional workloads spanning text, images and tool use.
- Limitations
- Frontier pricing stepped up from GPT-5's commodity rates.
Input / 1M
$5.00
Output / 1M
$30.00
Cached input / 1M
$0.5
Context window
1M
Where it sits
21st-cheapest frontier model
by blended $/Mtok among 24 listed frontier models
210% above the frontier median
blended $/Mtok across 24 frontier models
Output costs 6× input
$5.00 in / $30.00 out per 1M
Cached input saves 90%
$0.5 vs $5.00 per 1M fresh
Held flat since launch (Apr 2026)
no blended price change recorded
Computed live from current prices and this model's history — not hand-written, so it stays accurate as prices move.
Price history
Only one price on record so far — the history chart appears once a price changes.
Snapshots
| Effective | Input | Output | Cached in | Note | Source |
|---|---|---|---|---|---|
| 23 Apr 2026 | $5.00 | $30.00 | $0.5 | openai.com/api/pricing |