Model comparison Synced Apr 5, 2026

Anthropic: Claude 3.5 Sonnet vs Google: Gemini 3.1 Pro Preview Custom Tools

Side-by-side comparison of Anthropic: Claude 3.5 Sonnet and Google: Gemini 3.1 Pro Preview Custom Tools. Compare pricing, context window, capabilities, and find out which is better for your workflow.

Verdict

strong confidence

Google: Gemini 3.1 Pro Preview Custom Tools leads overall

Google: Gemini 3.1 Pro Preview Custom Tools leads in price and context window and capabilities and max output, making it the stronger choice for most workflows. Anthropic: Claude 3.5 Sonnet remains a solid alternative depending on your specific needs.

Best for with Anthropic: Claude 3.5 Sonnet

No clear advantages identified

Best for with Google: Gemini 3.1 Pro Preview Custom Tools

Budget-conscious workflowsLong document processingMulti-modal tasksLong-form content generation

Side-by-side

Technical specifications

	Anthropic: Claude 3.5 Sonnet	Google: Gemini 3.1 Pro Preview Custom Tools
Provider	Anthropic	Google
Input price	$6/M	$2/M
Output price	$30/M	$12/M
Context window	200K	1.0M
Max output	8K	66K
Capabilities	Tool useVision	Tool useVisionAudioReasoning
Released	Oct 21, 2024	Feb 25, 2026

View Anthropic: Claude 3.5 Sonnet profile View Google: Gemini 3.1 Pro Preview Custom Tools profile

Scoring breakdown

How each dimension compares

Price

Google: Gemini 3.1 Pro Preview Custom Tools leads

Anthropic: Claude 3.5 Sonnet

$30/M tokens