How much cheaper is Gemini 3.1 Pro than Claude Sonnet 5?

Gemini 3.1 Pro costs $2/$12 per 1M tokens while Claude Sonnet 5 costs $3/$15. Gemini 3.1 Pro is 33% cheaper on input and 20% cheaper on output. For 1M input + 500K output tokens/month, Sonnet 5 costs $10.50 vs Gemini 3.1 Pro's $8 — saving $2.50/month.

Is Sonnet 5 better than Gemini 3.1 Pro?

Both are excellent mid-tier models at 1M context. Sonnet 5 ($3/$15) excels at code generation and complex reasoning. Gemini 3.1 Pro ($2/$12) offers strong multimodal capabilities and Google ecosystem integration. Sonnet 5 is 50% more expensive on input but has slightly better reasoning in benchmarks.

When should I choose Gemini 3.1 Pro over Sonnet 5?

Choose Gemini 3.1 Pro ($2/$12) when you need Google ecosystem integration, multimodal capabilities (images, video), or 33% lower input costs. Choose Sonnet 5 ($3/$15) when you need superior code generation, complex reasoning, or Anthropic's safety-focused approach. Both handle 1M context.

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Mid Mid

Claude Sonnet 5 vs Gemini 3.1 Pro

Anthropic's newest mid-tier takes on Google's flagship. Sonnet 5 at $3/$15 trades blows with Gemini 3.1 Pro at $2/$12 — similar capabilities, different prices. Which offers better value?

Pricing data verified: Jul 1, 2026

Specification	Claude Sonnet 5 (Anthropic)	Gemini 3.1 Pro (Google)
Input Price (per 1M tokens)	$3.00	$2.00
Output Price (per 1M tokens)	$15.00	$12.00
Context Window	1M tokens	1M tokens
Tier	Mid	Mid
Provider	Anthropic	Google

Calculate Your Exact Costs

Two premium mid-tier models — see which offers better value for your usage.

Input Tokens per Request

Output Tokens per Request

Requests per Day

Days per Month

Anthropic

Claude Sonnet 5

$0.00

per month

Input cost

Output cost

Cost per request

Requests/month

Google

Gemini 3.1 Pro

$0.00

per month

Input cost

Output cost

Cost per request

Requests/month

Other Mid-Tier Models

GPT-5.5

OpenAI

$5 / $30 per 1M

1.05M context

GPT-5.4

OpenAI

$2.50 / $15 per 1M

400K context

Gemini 3.5 Flash

Google

$1.50 / $9 per 1M

1M context

Which Model for Which Use Case?

Code Generation

Sonnet 5 at $3/$15 is optimized for complex coding. Gemini 3.1 Pro at $2/$12 handles code well at 33% lower input cost. For production code quality, Sonnet 5 edges ahead. For cost-effective coding, Gemini 3.1 Pro wins.

Quality code: Sonnet 5 | Budget code: Gemini 3.1 Pro

Multimodal Tasks

Gemini 3.1 Pro at $2/$12 supports images, video, and audio natively. Sonnet 5 at $3/$15 focuses on text. For multimodal workflows, Gemini 3.1 Pro is the clear choice — better capabilities at lower cost.

Multimodal: Gemini 3.1 Pro

Complex Analysis

Both handle complex reasoning well. Sonnet 5 at $3/$15 excels at nuanced text analysis. Gemini 3.1 Pro at $2/$12 offers strong reasoning with Google's search integration. For pure text analysis, Sonnet 5 has a slight edge.

Text analysis: Sonnet 5 | Search-augmented: Gemini 3.1 Pro

High-Volume Batch Processing

At 10M input + 5M output tokens/month, Sonnet 5 costs $105 vs Gemini 3.1 Pro's $80 — saving $25/month. For batch workloads, Gemini 3.1 Pro's 33% lower input cost makes it the better value.

Better value: Gemini 3.1 Pro

Comparing Anthropic and Google models?

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Frequently Asked Questions

How much cheaper is Gemini 3.1 Pro than Sonnet 5?

Gemini 3.1 Pro costs $2/$12 per 1M tokens vs Sonnet 5 at $3/$15 — 33% cheaper on input, 20% cheaper on output. At 1M input + 500K output tokens/month, that's $8 vs $10.50, saving $2.50/month. At 10M input + 5M output, savings reach $25/month.

Is Sonnet 5 worth the extra cost over Gemini 3.1 Pro?

Sonnet 5 ($3/$15) offers superior code generation and reasoning. Gemini 3.1 Pro ($2/$12) excels at multimodal tasks and Google integration. For code-heavy workloads, Sonnet 5's quality justifies the premium. For multimodal or Google ecosystem work, Gemini 3.1 Pro is the better value.

Does Sonnet 5 have introductory pricing?

Yes. Claude Sonnet 5 offers introductory pricing of $2/$10 per MTok through August 31, 2026 — 33% cheaper than standard. After August 31, it returns to $3/$15. Gemini 3.1 Pro has no announced introductory pricing at $2/$12.