GPT-5.5 (medium)
ModelActiveby OpenAI · family “gpt-medium”
Epoch Capabilities Index
Not scored by Epoch AI
Released
23 Apr 2026
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Input $ / 1M tokens
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Output $ / 1M tokens
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Cached input $ / 1M
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Each benchmark shown separately with its own source
Benchmark results (5)
| Benchmark | Domain | Score | vs best recorded | Setting | Run | Source |
|---|---|---|---|---|---|---|
| Surface Evolver Bench | science | 81.3% | 86% | medium | — | External ↗ |
| DeepSWE | coding | 54.0% | 73% | medium | — | External ↗ |
| DeepResearch Bench | agents | 49.6% | 90% | medium | — | External ↗ |
| ARC-AGI-2 | reasoning | 70.4% | 74% | medium | — | External ↗ |
| ARC-AGI | reasoning | 92.2% | 94% | medium | — | External ↗ |
Source: Epoch AI Benchmarking Hub (CC BY 4.0). “External” rows are leaderboard results Epoch collects from third parties. Best reported setting per benchmark is shown.
API list price over time
Price history
$ per 1M tokens
No data recorded for this period
0 observations (OpenRouter listing). History accumulates with every ingest run; a single point means no change has been observed yet.
Events
- Model launch5mo agoOpenAI releases GPT-5.5 (medium)Epoch AI Benchmarking Hub