Claude Opus 5 vs GPT-5.6 Sol
MMMU-Pro (vision) MMMU-Pro (vision): College-level questions that require understanding images: charts, diagrams, photos
Opus 581.6
GPT-5.6 Sol81.4
Chartography Chartography: Expert chart reasoning over professional scientific, medical, financial and engineering charts
Opus 5 · max27.3
GPT-5.6 Sol · max45
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
Opus 520
GPT-5.6 Sol26.2
Arena Document · overall Arena Document · overall: Human pairwise preferences in the stated document vote pool
Opus 5 · high1,516.3
GPT-5.6 Sol · xhigh1,482.7
Arena Vision · overall Arena Vision · overall: Human pairwise preferences in the stated vision vote pool
Opus 5 · high1,319.6
GPT-5.6 Sol · xhigh1,280.6
| Benchmark | Opus 5 | GPT-5.6 Sol |
|---|---|---|
| MMMU-Pro (vision) | 81.6 | 81.4 |
| Chartography | 27.3 · max | 45 · max |
| GDP.pdf · AA all-pass | 20 | 26.2 |
| Arena Document · overall | 1,516.3 · high | 1,482.7 · xhigh |
| Arena Vision · overall | 1,319.6 · high | 1,280.6 · xhigh |
Specs
| Spec | Opus 5 | GPT-5.6 Sol |
|---|---|---|
| Input, per 1M | $5 | $4 |
| Output, per 1M | $25 | $20 |
| Cost per task? | $2.19 | $0.50 |
| Speed, tok/s | 55 | 85 |
| Context | 1M | 1.05M |
| Weights | Closed | Closed |
| Released | Jul 2026 | Jul 2026 |
| See images | ✓ | ✓ |
| Read PDFs | Partial | Partial |
| Hear audio | — | — |
| Watch video | — | — |
| Call tools | ✓ | ✓ |
| Force a tool call | Partial | Partial |
| Return strict JSON | ✓ | ✓ |
| Search the web | ? | ? |
| Run code | ? | ? |
| Use a computer | ? | ? |
What breaks when you switch
Opus 5 → GPT-5.6 Sol
Nothing known.
GPT-5.6 Sol → Opus 5