GPT-5.4 (2026-03-05) vs GPT-5.5
MMMU-Pro (vision) MMMU-Pro (vision): College-level questions that require understanding images: charts, diagrams, photos
GPT-5.4 (2026-03-05)—
GPT-5.581.2
Chartography Chartography: Expert chart reasoning over professional scientific, medical, financial and engineering charts
GPT-5.4 (2026-03-05)—
GPT-5.5 · xhigh31
GDP.pdf · AA all-pass GDP.pdf · AA all-pass: Models reason over professional PDF documents; an attempt passes only when every atomic criterion passes
GPT-5.4 (2026-03-05)—
GPT-5.520.6
Arena Document · overall Arena Document · overall: Human pairwise preferences in the stated document vote pool
GPT-5.4 (2026-03-05)—
GPT-5.51,485.7
Arena Vision · overall Arena Vision · overall: Human pairwise preferences in the stated vision vote pool
GPT-5.4 (2026-03-05)—
GPT-5.51,297
| Benchmark | GPT-5.4 (2026-03-05) | GPT-5.5 |
|---|---|---|
| MMMU-Pro (vision) | — | 81.2 |
| Chartography | — | 31 · xhigh |
| GDP.pdf · AA all-pass | — | 20.6 |
| Arena Document · overall | — | 1,485.7 |
| Arena Vision · overall | — | 1,297 |
Specs
| Spec | GPT-5.4 (2026-03-05) | GPT-5.5 |
|---|---|---|
| Input, per 1M | !$2.50 | $5 |
| Output, per 1M | !$15 | $30 |
| Cost per task? | — | $0.90 |
| Speed, tok/s | — | 89 |
| Context | 1.05M | 1.05M |
| Weights | Not verified | Closed |
| Released | Mar 2026 | Apr 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-5.4 (2026-03-05) → GPT-5.5
Prompts with >272K input tokens›
Above 272K input tokens, input costs 2× and output 1.5× for the full session in Standard, Batch and Flex.
GPT-5.5 → GPT-5.4 (2026-03-05)
Nothing known.