Claude 3 Sonnet vs OpenAI o1 Pro

Performance benchmarks + pricing comparison — updated April 2026

Claude 3 Sonnet

Anthropic

First generation Sonnet. Balanced performance for general tasks.

Input	$3.00/M
Output	$15.00/M
Context	200K tokens
Best For	General-purpose coding and reasoning
Benchmark	65/100

OpenAI

Premium reasoning model with extended compute. Best-in-class for complex math, science, and advanced coding challenges.

Input	$20.00/M
Output	$80.00/M
Context	200K tokens
Best For	Research-grade problem solving, competition math, complex system design

Estimated cost per project with 30% cache hit rate. Actual costs may vary based on usage patterns.

Scenario	Claude 3 Sonnet	OpenAI o1 Pro	Savings
Small Script (1K lines)	$0.55	$3.10	Claude 3 Sonnet saves $2.54 (82%)
Medium Feature (10K lines)	$4.05	$23.00	Claude 3 Sonnet saves $18.95 (82%)
Large Project (50K lines)	$20.25	$115.00	Claude 3 Sonnet saves $94.75 (82%)
Code Review (5K lines)	$0.90	$5.50	Claude 3 Sonnet saves $4.60 (84%)

Claude 3 Sonnet wins on both price and performance — $3.00/M input with a benchmark score of N/A/100.

For most developers, this is the clear choice between these two models.

Anthropic's balanced model for coding and general tasks. Best price-performance ratio in the Claude family.

Anthropic's most powerful model. Best for complex reasoning and challenging coding tasks.

Previous generation Sonnet. Still excellent for coding tasks at the same price point.

Fast, cost-effective model for high-volume tasks. Great for code review and simple queries.

First generation Opus. Highest reasoning capability in the Claude 3 family.

Cheapest Claude model. Fast responses for simple tasks and basic coding.