OpenAI o3 vs Phi-3 Medium

Performance benchmarks + pricing comparison — updated April 2026

OpenAI o3

OpenAI

Next generation reasoning model. Improved coding and math over o1.

Input	$10.00/M
Output	$40.00/M
Context	200K tokens
Best For	Advanced coding, complex problem-solving
Benchmark	85/100

Microsoft

Microsoft's mid-size Phi-3 model. Better performance than Mini for moderate complexity tasks.

Input	$0.100/M
Output	$0.300/M
Context	128K tokens
Best For	Moderate complexity tasks, Azure-based applications

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

Scenario	OpenAI o3	Phi-3 Medium	Savings
Small Script (1K lines)	$1.55	$0.01	Phi-3 Medium saves $1.54 (99%)
Medium Feature (10K lines)	$11.50	$0.10	Phi-3 Medium saves $11.40 (99%)
Large Project (50K lines)	$57.50	$0.47	Phi-3 Medium saves $57.02 (99%)
Code Review (5K lines)	$2.75	$0.02	Phi-3 Medium saves $2.73 (99%)

Phi-3 Medium wins on both price and performance — $0.100/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.

First generation Sonnet. Balanced performance for general tasks.