Gemini 3 Pro Preview vs Gemini 3.1 Pro Preview
Different efforts: high · thinking · Compare all at high
AA Speech to text · Recorded audio word error rate AA Speech-to-Text · Non-streaming WER (version unstated): Measures transcription errors as a share of reference words in the non-streaming test · lower is better
Gemini 3 Pro Preview—
Gemini 3.1 Pro Preview · high2.8
| Benchmark | Gemini 3 Pro Preview | Gemini 3.1 Pro Preview |
|---|---|---|
| AA Speech to text · Recorded audio word error rate | — | 2.8 · 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.