gemini-3.1-pro-preview vs gpt-5.1
Side-by-side comparison of gemini-3.1-pro-preview and gpt-5.1: benchmarks, pricing, context window and capabilities. Both are accessible through Requesty's unified API. gemini-3.1-pro-preview outperforms gpt-5.1 on 6 of 6 shared benchmarks.
gemini-3.1-pro-preview
Input / 1M
$2.00
Output / 1M
$12.00
Context
1.0M
Model ID
google/gemini-3.1-pro-preview
gpt-5.1
Input / 1M
$1.25
Output / 1M
$10.00
Context
400K
Model ID
openai/gpt-5.1
Benchmark comparison
Intelligence Indexreasoning
gemini-3.1-pro-preview36.7%
gpt-5.129.1%
Coding Indexcoding
gemini-3.1-pro-preview68.8%
gpt-5.149.4%
Math Indexmath
gemini-3.1-pro-previewN/A
gpt-5.194.0%
GPQA Diamondreasoning
gemini-3.1-pro-preview94.1%
gpt-5.187.3%
AIME 2025math
gemini-3.1-pro-previewN/A
gpt-5.194.0%
LiveCodeBenchcoding
gemini-3.1-pro-previewN/A
gpt-5.186.8%
Terminal-Bench Hardagentic
gemini-3.1-pro-preview53.8%
gpt-5.145.5%
τ²-Benchagentic
gemini-3.1-pro-preview95.6%
gpt-5.181.9%
SciCodecoding
gemini-3.1-pro-preview58.7%
gpt-5.1N/A
MMLU Proknowledge
gemini-3.1-pro-previewN/A
gpt-5.187.0%
Humanity's Last Examreasoning
gemini-3.1-pro-preview47.0%
gpt-5.128.5%
Scores sourced from official model cards, Artificial Analysis, and public leaderboards. Benchmarks measure specific skills and don't capture every aspect of model quality.
Pricing & specifications
| gemini-3.1-pro-preview | gpt-5.1 | |
|---|---|---|
| Input price / 1M | $2.00 | $1.25 |
| Output price / 1M | $12.00 | $10.00 |
| Context window | 1.0M tokens | 400K tokens |
| Max output | 66K tokens | 128K tokens |
| Vision input | Yes | Yes |
| Tool calling | Yes | Yes |
| Reasoning | Yes | Yes |
| Prompt caching | Yes | Yes |
| Computer use | N/A | N/A |
| Provider | Google LLC (Gemini API) | OpenAI Inc. |
Questions people ask
Is gemini-3.1-pro-preview better than gpt-5.1?
gemini-3.1-pro-preview outperforms gpt-5.1 on 6 of 6 shared benchmarks. See the benchmark comparison above for specifics: gemini-3.1-pro-preview and gpt-5.1 have different strengths across reasoning, coding, math and multimodal tasks.
Which is cheaper, gemini-3.1-pro-preview or gpt-5.1?
gpt-5.1 is cheaper. gemini-3.1-pro-preview costs $2.00/$12.00 per 1M input/output tokens, while gpt-5.1 costs $1.25/$10.00.
Can I use gemini-3.1-pro-preview and gpt-5.1 through the same API?
Yes. Requesty provides a single OpenAI-compatible API that routes to both. Change just the "model" parameter to switch between "google/gemini-3.1-pro-preview" and "openai/gpt-5.1", no other code changes needed.
What are the context windows?
gemini-3.1-pro-preview supports up to 1.0M tokens of context. gpt-5.1 supports up to 400K tokens. Longer context means you can feed larger documents or codebases in a single prompt, though quality often degrades past 128K for most models.
Switch between gemini-3.1-pro-preview and gpt-5.1 with one line of code
Requesty provides a single OpenAI-compatible API for 600+ models. Change the model parameter, not your code.