GPT-5.5vsGPT-5.1
Across 10 shared benchmarks, GPT-5.5 leads overall: GPT-5.5 wins 10, GPT-5.1 wins 0, with 0 ties and an average score difference of +23.14.
GPT-5.510 wins(100%)(0%)0 winsGPT-5.1
Benchmark scores
Grouped by capability, sorted by largest gap within each. 10 shared benchmarks.
General Knowledge
GPT-5.5 4/4| Benchmark | GPT-5.5 | GPT-5.1 | Diff |
|---|---|---|---|
| ARC-AGI-2 | 851 / 58极高强度思考（无工具） | 17.6032 / 58high | +67.40 |
| ARC-AGI | 953 / 65极高强度思考（无工具） | 72.8025 / 65high | +22.20 |
| HLE | 52.2010 / 149Thinking High (With Tools) | 42.7038 / 149 |
Specs
| Field | GPT-5.5 | GPT-5.1 |
|---|---|---|
| Publisher | OpenAI | OpenAI |
| Release date | 2026-04-23 | 2025-11-12 |
| Model type | Reasoning model | Reasoning model |
| Architecture | Dense | Dense |
| Parameters | 0.0 | 0.0 |
| Context length | 1000K | 400K |
| Max output | 131072 | 131072 |
API pricing
Prices use DataLearner records when available; missing fields are not inferred.
| Item | GPT-5.5 | GPT-5.1 |
|---|---|---|
| Text input | $0.5 / 1M tokens | 1.25 美元/100万 tokens |
| Text output | $30 / 1M tokens | 10 美元/100万 tokens |
| Cache read | $0.5 / 1M tokens | 0.125 美元/100万 tokens |
| Cache write | $6.25 / 1M tokens | Not public |
Summary
- GPT-5.5leads in:General Knowledge (4/4), Math and Reasoning (2/2), Agent Level Benchmark (1/1), AI Agent - Information Search (1/1), AI Agent - Tool Usage (1/1), Coding and Software Engineer (1/1)
On average across the 10 shared benchmarks, GPT-5.5 scores 23.14 higher.
Largest single-benchmark gap: ARC-AGI-2 — GPT-5.5 85 vs GPT-5.1 17.60 (+67.40).
Page generated from structured model, pricing and benchmark records. No real-time LLM is used to write the prose.