POST /v1/chat/completionsGemini 3.1 Pro Preview
gemini-3.1-pro-previewGemini 3.1 Pro Preview is presented as a reliability-focused refinement of Gemini 3 Pro. Google’s preview notes emphasize better thinking, token efficiency, grounding, factuality, software engineering, agentic tool use, and multi-step execution. The preview label matters: it should be described as an advanced but evolving model for teams testing the next Pro behavior.
Total Context
1Mtokens
Max Output
65.5Ktokens
Released
Feb 19, 2026
Modalities
Gemini 3.1 Pro Preview Price
| Token Tier | Input Price | Output Price | Cache Read | Cache Create 5m |
|---|---|---|---|---|
| <=200K | $2/M | $12/M | $0.2/M | $0.375/M |
| >200K | $4/M | $18/M | $0.4/M | $0.375/M |
Gemini 3.1 Pro Preview API
Gemini 3.1 Pro Preview Benchmark
Gemini 3.1 Pro Preview
46.5
/100
Artificial Analysis Intelligence Index
Artificial Analysis broad capability aggregate
Index score
55.5
/100
Artificial Analysis Coding Index
Artificial Analysis software task aggregate
Index score
Knowledge & Reasoning
GPQA
Advanced science problem solving
94.1%
HLE
Broad expert-level exam set
44.7%
Coding & Engineering
SciCode
Scientific coding challenges
58.9%
Terminal-Bench Hard
Hard terminal task execution
53.8%
Instruction Following & Agent Tasks
IFBench
Prompt constraint adherence
77.1%
AA-LCR
Long-context reasoning
72.7%
τ²-Bench
Agent workflow tasks
95.6%
Metrics sourced from Artificial Analysis
Model Comparison
Frequently asked questions about Gemini 3.1 Pro Preview
Understand what Gemini 3.1 Pro Preview is, its best uses, distinguishing strengths, practical tradeoffs, and safe TokenHub integration guidance.
What kind of model is Gemini 3.1 Pro Preview?+
Gemini 3.1 Pro Preview is Google’s preview Pro model for advanced reasoning, software engineering, and reliable multi-step tool use. It is a preview model, so behavior, identifiers, and availability can change before stabilization.
What should teams use Gemini 3.1 Pro Preview for?+
Best-fit scenarios include complex multi-step reasoning, software engineering and code maintenance, and analysis of text and visual inputs. Test representative inputs and define measurable acceptance criteria before production.
Where does Gemini 3.1 Pro Preview have a clear technical advantage?+
Key strengths include strong reasoning on difficult problems, effective use of tools and function calls, and improved factual consistency and grounding. This combination is especially useful for software engineering and code maintenance.
When should a team choose another model instead of Gemini 3.1 Pro Preview?+
Consider another model when a stable interface and predictable behavior are mandatory, very low latency is the main requirement, or the workflow cannot include human review for important decisions. Verify important factual, legal, financial, medical, or operational outputs with qualified human review.
What should be checked before integrating Gemini 3.1 Pro Preview with TokenHub?+
In TokenHub, select the exact model identifier displayed for Gemini 3.1 Pro Preview, use the endpoint documented for your account, and authenticate with your TokenHub credentials. Pin the exact identifier shown by TokenHub, test behavior changes, and plan a migration path because preview aliases can be updated or withdrawn.
Media and Discussions
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