Model comparison Synced Apr 6, 2026

Anthropic: Claude 3.7 Sonnet (thinking) vs OpenAI: o3 Pro

Side-by-side comparison of Anthropic: Claude 3.7 Sonnet (thinking) and OpenAI: o3 Pro. Compare pricing, context window, capabilities, and find out which is better for your workflow.

Verdict

moderate confidence

Anthropic: Claude 3.7 Sonnet (thinking) and OpenAI: o3 Pro are closely matched across pricing, context, and capabilities. Your choice depends on workflow-specific factors like provider ecosystem preference and existing integrations.

Best for with Anthropic: Claude 3.7 Sonnet (thinking)

Budget-conscious workflows

Best for with OpenAI: o3 Pro

Long-form content generation

Side-by-side

Technical specifications

	Anthropic: Claude 3.7 Sonnet (thinking)	OpenAI: o3 Pro
Provider	Anthropic	OpenAI
Input price	$3/M	$20/M
Output price	$15/M	$80/M
Context window	200K	200K
Max output	64K	100K
Capabilities	Tool useVisionReasoning	Tool useVisionReasoning
Released	Feb 24, 2025	Jun 10, 2025

View Anthropic: Claude 3.7 Sonnet (thinking) profile View OpenAI: o3 Pro profile

Scoring breakdown