# GPT-5.5 release · 2026-04-23 · snapshot 2026-10-26

Creator: OpenAI · 5 effort levels

| Effort level | Input modalities | Intelligence | Total cost | E2E | On the frontier today | ID |
|---|---|---|---|---|---|---|
| GPT-5.5 (Medium) | Text, Image | 33.80 | $2095 | 11.5s | no | `gpt-5-5-medium` |
| GPT-5.5 (High) | Text, Image | 37.00 | $3411 | 20.8s | no | `gpt-5-5-high` |
| GPT-5.5 (Xhigh) | Text, Image | 38.40 | $5294 | 57.7s | no | `gpt-5-5` |
| GPT-5.5 (Low) | Text, Image | 30.70 | - | 8.11s | no | `gpt-5-5-low` |
| GPT-5.5 (Non-reasoning) | Text, Image | 23.20 | - | 7.40s | no | `gpt-5-5-non-reasoning` |

## Launch day (2026-04-23)

- Reached the frontier: 3 of 5
- Impact (intelligence × log-cost hypervolume gained): 7.04
- Rank: #3 of 46 releases this past year


> Metrics snapshot: 2026-10-26T03:27:40Z. Intelligence index version: unknown. Release timeline, frontier age, release impact and shakeup cards are reconstructions using one selected snapshot's metrics, not a record of what was known at release. Scores, benchmark cost and derived value may change when the index methodology changes. Source documentation advertises v4.3.2; API correspondence is unverified.