GPT-4o (2024-08-06) vs GPT-5.4 (2026-03-05)
| Benchmark | GPT-4o (2024-08-06) | GPT-5.4 (2026-03-05) |
|---|---|---|
| Humanity's Last Exam | 2.3 | — |
| MMMU-Pro (vision) | 56.3 | — |
Specs
| Spec | GPT-4o (2024-08-06) | GPT-5.4 (2026-03-05) |
|---|---|---|
| Input, per 1M | $2.50 | !$2.50 |
| Output, per 1M | $10 | !$15 |
| Speed, tok/s | 138 | — |
| Context | 128K | 1.05M |
| Weights | Closed | Not verified |
| Released | Aug 2024 | Mar 2026 |
| See images | ✓ | ✓ |
| Read PDFs | Partial | ? |
| Hear audio | — | — |
| Watch video | — | — |
| Call tools | ✓ | ✓ |
| Force a tool call | Partial | ? |
| Return strict JSON | ✓ | ✓ |
| Search the web | ✓ | ? |
| Run code | ? | ? |
| Use a computer | ? | ? |
What breaks when you switch
GPT-4o (2024-08-06) → GPT-5.4 (2026-03-05)
Nothing known.
GPT-5.4 (2026-03-05) → GPT-4o (2024-08-06)