Claude 3 Opus vs OpenAI o3 Pro
Performance benchmarks + pricing comparison — updated April 2026
Claude 3 Opus
AnthropicFirst generation Opus. Highest reasoning capability in the Claude 3 family.
| Input | $15.00/M |
| Output | $75.00/M |
| Context | 200K tokens |
| Best For | Deep analysis, complex coding tasks |
| Benchmark | 78/100 |
OpenAI o3 Pro
OpenAITop-tier reasoning model combining o3's coding strength with extended compute. The most powerful OpenAI model for reasoning-heavy coding.
| Input | $20.00/M |
| Output | $80.00/M |
| Context | 200K tokens |
| Best For | Complex algorithm design, system architecture, research coding |
Cost Comparison by Scenario
Estimated cost per project with 30% cache hit rate. Actual costs may vary based on usage patterns.
| Scenario | Claude 3 Opus | OpenAI o3 Pro | Savings |
|---|---|---|---|
| Small Script (1K lines) | $2.77 | $3.10 | Claude 3 Opus saves $0.33 (10%) |
| Medium Feature (10K lines) | $20.25 | $23.00 | Claude 3 Opus saves $2.75 (12%) |
| Large Project (50K lines) | $101.25 | $115.00 | Claude 3 Opus saves $13.75 (12%) |
| Code Review (5K lines) | $4.50 | $5.50 | Claude 3 Opus saves $1.00 (18%) |
Verdict
Claude 3 Opus wins on both price and performance — $15.00/M input with a benchmark score of N/A/100.
For most developers, this is the clear choice between these two models.
Compare with Other Models
Claude Sonnet 4
AnthropicAnthropic's balanced model for coding and general tasks. Best price-performance ratio in the Claude family.
Claude Opus 4
AnthropicAnthropic's most powerful model. Best for complex reasoning and challenging coding tasks.
Claude 3.5 Sonnet
AnthropicPrevious generation Sonnet. Still excellent for coding tasks at the same price point.
Claude 3.5 Haiku
AnthropicFast, cost-effective model for high-volume tasks. Great for code review and simple queries.
Claude 3 Sonnet
AnthropicFirst generation Sonnet. Balanced performance for general tasks.
Claude 3 Haiku
AnthropicCheapest Claude model. Fast responses for simple tasks and basic coding.