OpenAI: GPT-5.5
OpenAI: GPT-5.5 is openai's model. On the un-leaked meo benchmark it ranks #1 of 22 with 73.2% accuracy and an Effective Value (π) of 0.0359 β earning a correct answer for about $0.0435 in 29s each.
as of 2026-06-08
Per-domain accuracy
Efficiency
- Cost per correct
- $0.0435
- Seconds per correct
- 29
- Tokens per correct
- 1,380
- Correct answers
- 177 / 251
- Total benchmark cost
- $7.69
- Avg tokens / item
- 973
Robustness under pressure
Susceptibility index 0.010 (Ξaccuracy under threatening/emotional prompts; β0 = robust), sway magnitude 0.010. How we measure this β
- control
- 67%
- neutral
- 67%
- user direct
- 67%
- model direct
- 67%
- user implied
- 71%
- model implied
- 67%
- positive control
- 63%
Aggregated third-party benchmarks
Artificial Analysis (artificialanalysis.ai). Redistribution requires an AA commercial license.
Model details
- Lab
- openai
- Released
- 2026-04-24
- Weights
- β
- Context
- 1.1M
- Max output
- 128K
- Knowledge cutoff
- 2025-12-01
- Price in
- $5.00/M
- Price out
- $30.00/M
- Modality
- text+image+file->text
Sources: openrouter Β· artificial_analysis Β· meo
FAQ
How accurate is OpenAI: GPT-5.5?
OpenAI: GPT-5.5 scores 73.2% overall on the meo benchmark (rank #1 of 22), an un-leaked private holdout graded objective-first.
What is OpenAI: GPT-5.5's Effective Value?
Its Effective Value (π) is 0.0359 at N=10, Ο=1, Ξ΄=1.5 β a fused metric of accuracy, speed, cost, and error-cascade. π rankings shift with task depth.
How much does OpenAI: GPT-5.5 cost per correct answer?
About $0.0435 per correct answer (1,380 tokens, 29 seconds each) at benchmark-time pricing via OpenRouter.
Is OpenAI: GPT-5.5 open weights?
Open-weights status for OpenAI: GPT-5.5 is not recorded.