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Gemini 3.1 Pro Preview Custom Tools vs DeepSeek V3.1

Detailed technical comparison between Gemini 3.1 Pro Preview Custom Tools (Google) and DeepSeek V3.1 (DeepSeek). Review live API token pricing, context window capabilities, time-to-first-token latency, and verified benchmark scores side-by-side.

⚡ Executive Summary & Verdict

Comparison Snapshot

Gemini 3.1 Pro Preview Custom Tools: 6 WinsvsDeepSeek V3.1: 0 Wins
Context Leader

Gemini 3.1 Pro Preview Custom Tools

1,048,576 tokens
Agentic Tool-Calling

Tie

Equal Capability
Lowest Latency (TTFT)

Tie

Equal Speed
Input Price Leader

DeepSeek V3.1

$0.25 / MTok
Googleactive

Gemini 3.1 Pro Preview Custom Tools

Gemini 3.1 Pro Preview Custom Tools is a variant of Gemini 3.1 Pro that improves tool selection behavior by preventing overuse of a general bash tool when more efficient third-party...

View Gemini 3.1 Pro Preview Custom Tools Full Specs →
DeepSeekactive

DeepSeek V3.1

DeepSeek-V3.1 is a large hybrid reasoning model (671B parameters, 37B active) that supports both thinking and non-thinking modes via prompt templates. It extends the DeepSeek-V3 base with a two-phase long-context...

View DeepSeek V3.1 Full Specs →

Technical Specifications

🏆 = Superior Spec
SpecificationGemini 3.1 Pro Preview Custom ToolsDeepSeek V3.1
ProviderGoogleDeepSeek
Context Window1,048,576 tokens🏆163,840 tokens
Agent SuitabilityNot yet benchmarkedNot yet benchmarked
Time to First Token (TTFT)No public TTFT dataNo public TTFT data
Deployment Modelmanaged apiself hostable
Production StabilityBeta Access (est.)Stable GA (est.)
API AvailableYesYes
Released Date2026-02-252025-08-21

API Pricing Comparison

Input Price per Million Tokens

Gemini 3.1 Pro Preview Custom Tools

$2.00

DeepSeek V3.1

$0.25

Output Price per Million Tokens

Gemini 3.1 Pro Preview Custom Tools

$12.00

DeepSeek V3.1

$0.95

💡 Cost Ratio: DeepSeek V3.1 is 8.0x cheaper per input token than Gemini 3.1 Pro Preview Custom Tools.

Want to test both models live?

Run side-by-side prompt benchmarks in our dynamic multi-model Sandbox. Compare execution speeds, latency metrics, and compute actual costs in real-time.

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Benchmark Performance Metrics

Standardized Scores (0–100%)

Scores show verified raw accuracy percentages across standardized AI evaluation suites. Higher bars indicate superior performance in that domain.

MMLUGeneral knowledge & multi-task understanding
86.8%vs80.0%+6.8% Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools 🏆
DeepSeek V3.1
HumanEvalPython coding & logic synthesis
86.0%vs78.2%+7.8% Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools 🏆
DeepSeek V3.1
MATHComplex mathematical problem solving
67.2%vs55.4%+11.8% Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools 🏆
DeepSeek V3.1
GPQAGraduate-level expert reasoning
48.6%vs40.8%+7.8% Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools 🏆
DeepSeek V3.1
HellaSwagCommonsense reasoning and inference
87.8%vs83.0%+4.8% Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools 🏆
DeepSeek V3.1
MT-BenchMulti-turn conversation flow quality
9.0%vs8.6%+0.5% Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools 🏆
DeepSeek V3.1

Gemini 3.1 Pro Preview Custom Tools Quirks & Gotchas

No developer gotchas reported.

DeepSeek V3.1 Quirks & Gotchas

No developer gotchas reported.

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