GPT-5.5
Closed
GPT-5.5 is an AI model from OpenAI.
- Publisher
- OpenAI
- Family
- GPT
- Context
- 1.1M
- Input
- Output
- License
- proprietary
- Released
- 23 Apr 2026
Cite
Notes
Only stored in your browser.
Context
1.1M
Input
$5
/1M tok
Output
$30
/1M tok
Blended
$11.25
#428/ 441/1M · 3:1
Speed
0
#109/ 441tok/s
Cache read
$0.25
0.05x input
Price & speed via Artificial Analysis · ranked across tracked models · caching via OpenRouter
| Reasoning effort | Index | Speed |
|---|---|---|
| xhigh | 56.3 | 0 t/s |
| high | 54.7 | 0 t/s |
| medium | 51.4 | 0 t/s |
| low | 44.5 | 0 t/s |
| Non-reasoning | 35.8 | 0 t/s |
Intelligence Index per reasoning-effort setting, via Artificial Analysis · pricing identical across tiers
Reported on 48 evals across 20 domains - best 100.0% on Physgym Arena Medley Public · #1 of 6
Reported eval scores
48Apex Shortlist86.2
Teaching Env75.7
Graphwalks15.1
AutomationBench12.9
MathArena92.8
FrontierMath51.7
IFBench46.1