GPT-5.5
active
OpenAI2026-04-24
Specifications
Modalities
text
image
Context Window1050K tokens
Max Output128K tokens
Training Cutoff2025-12-01
Open SourceNo
Pricing (per 1M tokens)
Input$5.0000
Output$30.0000
Cache Read$0.5000
Benchmarks
Arena score (text)1482
Arena ratings: LMArena leaderboard dataset, CC BY 4.0, snapshot 2026-10-28.
MMLU-Pro-
SWE-Bench-
GPQA Diamond-
HumanEval-
ARC-AGI-
MATH-
API
Model ID
gpt-5.5Sources
- OpenAI: GPT-5.5 Model | OpenAI API
general · as of 2026-07-04
- OpenAI: Pricing | OpenAI API
price input · as of 2026-07-04
- OpenAI: Introducing GPT-5.5
general · as of 2026-07-04
- LMArena: Arena leaderboard dataset, text_style_control overall: GPT-5.5 (High)
elo rating · as of 2026-10-28