Gemini 2.5 Pro Preview 03 25 vs Gemini 3.1 Pro Preview
Humanity's Last Exam Humanity's Last Exam: Very hard expert questions across many fields, written to stump today’s models
Gemini 2.5 Pro Preview 03 25—
Gemini 3.1 Pro Preview47
Terminal-Bench 4.0 Terminal-Bench 4.0 · source setting 2: Agents use a terminal to complete executable coding, system administration and research tasks in the 4.0 suite
Gemini 2.5 Pro Preview 03 25—
Gemini 3.1 Pro Preview4
AutomationBench-AA AutomationBench-AA: Agents orchestrate SaaS workflows through APIs; objectives receive credit only when the task has no guardrail violation
Gemini 2.5 Pro Preview 03 25—
Gemini 3.1 Pro Preview35.4
Arena Text · creative writing Arena Text · creative writing: Human pairwise preferences in the stated text vote pool
Gemini 2.5 Pro Preview 03 25—
Gemini 3.1 Pro Preview1,481
MMMU-Pro (vision) MMMU-Pro (vision): College-level questions that require understanding images: charts, diagrams, photos
Gemini 2.5 Pro Preview 03 25—
Gemini 3.1 Pro Preview82.4
| Benchmark | Gemini 2.5 Pro Preview 03 25 | Gemini 3.1 Pro Preview |
|---|---|---|
| Humanity's Last Exam | — | 47 |
| Terminal-Bench 4.0 | — | 4 |
| AutomationBench-AA | — | 35.4 |
| Arena Text · creative writing | — | 1,481 |
| MMMU-Pro (vision) | — | 82.4 |
Specs
| Spec | Gemini 2.5 Pro Preview 03 25 | Gemini 3.1 Pro Preview |
|---|---|---|
| Input, per 1M | !$2.50 | $2 |
| Output, per 1M | !$10 | $12 |
| Cost per task? | — | $1.30 |
| Speed, tok/s | — | 115 |
| Context | 1M | 1M |
| Weights | Not verified | Closed |
| Released | Mar 2025 | Feb 2026 |
| See images | ✓ | ✓ |
| Read PDFs | — | ✓ |
| 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
Gemini 2.5 Pro Preview 03 25 → Gemini 3.1 Pro Preview
Cannot use both thinking controls›
Setting thinking_level and legacy thinking_budget together returns HTTP 400; use only one.
Gemini 3.1 Pro Preview → Gemini 2.5 Pro Preview 03 25