All comparisons
Google-Proof Q&A 93.6 — SWE-bench Pro 58.6 — SWE-bench Verified — 74.9
GPT-5.5 vs GPT-5
Side-by-side comparison of specifications, capabilities, and pricing.
| Released | 2026-04-23 | 2025-01-21 |
| Context window | 1M | 128K |
| Parameters | — | — |
| Architecture | decoder only | decoder only |
| License | Proprietary | Proprietary |
| Knowledge cutoff | — | — |
Capabilities | ||
| Vision | ||
| Multimodal | ||
| Reasoning | ||
| Function calling | ||
| Tool use | ||
| Structured Outputs | ||
| Code execution | ||
Availability | ||
| Providers | ||
Benchmarks