Step 3.5 Flash vs Step 3.7 Flash
Different efforts: thinking · high
Humanity's Last Exam Humanity's Last Exam: Very hard expert questions across many fields, written to stump today’s models
Step 3.5 Flash24.5
Step 3.7 Flash21.4
Arena Text · creative writing Arena Text · creative writing: Human pairwise preferences in the stated text vote pool
Step 3.5 Flash1,345
Step 3.7 Flash—
MMMU-Pro (vision) MMMU-Pro (vision): College-level questions that require understanding images: charts, diagrams, photos
Step 3.5 Flash—
Step 3.7 Flash75.3
| Benchmark | Step 3.5 Flash | Step 3.7 Flash |
|---|---|---|
| Humanity's Last Exam | 24.5 | 21.4 |
| Arena Text · creative writing | 1,345 | — |
| MMMU-Pro (vision) | — | 75.3 |
Specs
| Spec | Step 3.5 Flash | Step 3.7 Flash |
|---|---|---|
| Input, per 1M | $0.10 | $0.20 |
| Output, per 1M | $0.30 | $1.15 |
| Speed, tok/s | 129 | 123 |
| Context | 256K | 256K |
| Weights | Closed | Open |
| Released | Apr 2026 | May 2026 |
| Memory (4-bit) | — | 121 GB |
| Licence | — | Apache-2.0 |
| Commercial use | — | Allowed |
| See images | — | ✓ |
| Read PDFs | — | — |
| 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
Step 3.5 Flash → Step 3.7 Flash
Nothing known.
Step 3.7 Flash → Step 3.5 Flash