Gemini 3 Pro Preview vs Gemini 3.1 Pro Preview
MCP-Atlas Public?
Gemini 3 Pro Preview73
Gemini 3.1 Pro Previewat high80.6
MCP-Atlas · full 1000?
Gemini 3 Pro Preview70.3
Gemini 3.1 Pro Previewat high78.2
Harvey LAB-AA 1.1?
Gemini 3 Pro Preview—
Gemini 3.1 Pro Preview0
EBR Bench?
Gemini 3 Pro Preview—
Gemini 3.1 Pro Preview14.3
| Benchmark | Gemini 3 Pro Preview | Gemini 3.1 Pro Preview |
|---|---|---|
| AutomationBench-AA | — | 35.4 |
| MCP-Atlas Public | 73 | 80.6 · high |
| MCP-Atlas · full 1000 | 70.3 | 78.2 · high |
| τ³-bench · banking · 1.0.1 | 18 | 26 · high |
| Terminal-Bench Hard (version unstated) | 41.7 | 53.8 |
| AA-LCR (long context) 1.1 | 76 | 82 |
| GDPval-AA (work tasks) 2.1 | — | 14.6 |
| τ³-Banking · AA | — | 21.4 |
| AA Analyst Agent | — | 41.3 |
| ITBench SRE | — | 30.3 |
| APEX-Agents | — | 32 |
| Terminal-Bench 4.0 | — | 4 |
| AA-Briefcase 1.1 · Elo | — | 456.5 |
| DeepSWE 1.1 | — | 11.7 · high |
| EnterpriseOps-Gym-AA | — | 42.2 |
| Harvey LAB-AA 1.1 | — | 0 |
| SWE-bench Pro (private) | 17.9 | — |
| EBR Bench | — | 14.3 |
| Furniture Assembly | — | 26.7 · high |
Specs
| Spec | Gemini 3 Pro Preview | Gemini 3.1 Pro Preview |
|---|---|---|
| Input, per 1M | !$2 | $2 |
| Output, per 1M | !$12 | $12 |
| Cost per task? | — | $1.30 |
| Speed, tok/s | — | 115 |
| Context | 1M | 1M |
| Weights | Closed | Closed |
| Released | Nov 2025 | Feb 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
Gemini 3 Pro Preview → 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 3 Pro Preview
Cannot use both thinking controls›
Setting thinking_level and legacy thinking_budget together returns HTTP 400; use only one.