GPT-5.5 Pro Extra High
| Released | 2026-04-23 |
|---|---|
| Price per 1M | $30.00 in · $180.00 out |
| Overall score | 64.6 (early, few results) |
| Context window | 1,050,000 tokens |
| Provider | OpenAI |
| Weights | Proprietary |
| Configuration | Extra High |
Scores
| Dimension | Score | Rank | Benchmarks |
|---|---|---|---|
| Overall: Balanced | 64.6 | 8 | |
| Overall: Coding | 64.7 | 5 | |
| Overall: Reasoning | 64.6 | 8 | |
| Overall: Agentic work | 64.7 | 5 | |
| Reasoning | 64.7 | 5 | |
| Math | 64.3 | 3 | |
| Value vs price | +2.5 |
Evidence
Reasoning 64.7 ±2.0
| Benchmark | Result | Source | Date |
|---|---|---|---|
| GPQA Diamond | 93.9% | Epoch AI | 2026-04-24 |
| ARC-AGI-2 | 84.2% | Epoch AI | 2026-11-11 |
| ARC-AGI-2 (ARC Prize verified) | 84.2% | ARC Prize | 2026-11-11 |
| CritPt | 30.6% | Epoch AI | 2026-11-11 |
| ARC-AGI-1 (ARC Prize verified) | 95.0% | ARC Prize | 2026-11-11 |
| ARC-AGI-1 | 95.0% | Epoch AI | 2026-11-11 |
| Chess Puzzles | 62.0% | Epoch AI | 2026-10-14 |
Math 64.3 ±2.0
| Benchmark | Result | Source | Date |
|---|---|---|---|
| OTIS Mock AIME 2024-2025 | 100.0% | Epoch AI | 2026-04-24 |
| FrontierMath Tier 4 | 78.1% | Epoch AI | 2026-06-12 |
| FrontierMath Tiers 1-3 | 87.7% | Epoch AI | 2026-06-12 |
| FrontierMath Tiers 1-3 (2025 set) | 51.0% | Epoch AI | 2026-04-23 |
| FrontierMath Tier 4 (2025 set) | 39.6% | Epoch AI | 2026-04-23 |
Names matched to this model
gpt-5-5-pro-xhigh