Model comparison Synced Mar 10, 2026

DeepSeek: DeepSeek V3.1 Terminus (exacto) vs xAI: Grok 4.1 Fast

Side-by-side comparison of DeepSeek: DeepSeek V3.1 Terminus (exacto) and xAI: Grok 4.1 Fast. Compare pricing, context window, capabilities, and find out which is better for your workflow.

Verdict

strong confidence

xAI: Grok 4.1 Fast leads overall

xAI: Grok 4.1 Fast leads in price and context window and capabilities and max output, making it the stronger choice for most workflows. DeepSeek: DeepSeek V3.1 Terminus (exacto) remains a solid alternative depending on your specific needs.

Best for with DeepSeek: DeepSeek V3.1 Terminus (exacto)

No clear advantages identified

Best for with xAI: Grok 4.1 Fast

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

Side-by-side

Technical specifications

	DeepSeek: DeepSeek V3.1 Terminus (exacto)	xAI: Grok 4.1 Fast
Provider	DeepSeek	xAI
Input price	$0.21/M	$0.20/M
Output price	$0.79/M	$0.50/M
Context window	164K	2.0M
Max output	N/A	30K
Capabilities	Tool useReasoning	Tool useVisionReasoning
Released	Sep 22, 2025	Nov 19, 2025

View DeepSeek: DeepSeek V3.1 Terminus (exacto) profile View xAI: Grok 4.1 Fast profile

Scoring breakdown