Claude Opus 4.7 vs o3
Pricing, context window, and benchmark comparison · Last updated April 2026
o3 is cheaper than Claude Opus 4.7 at $2.00/1M/1M vs $5.00/1M/1M input tokens — a 2.5x cost difference. Claude Opus 4.7 scores higher on quality benchmarks (ELO 1415). Choose o3 for cost-sensitive workloads; choose Claude Opus 4.7 for maximum quality.
Which is cheaper: Claude Opus 4.7 or o3?
o3 is the cheaper option at $2.00/1M per 1M input tokens, compared to $5.00/1M for Claude Opus 4.7. That is a 2.5x cost difference on input tokens. Output pricing follows a similar pattern: Claude Opus 4.7 charges $25.00/1M/1M vs $8.00/1M/1M for o3.
Which has better quality: Claude Opus 4.7 or o3?
Based on LMSYS Chatbot Arena rankings, Claude Opus 4.7 achieves a higher ELO score (1415 vs 1395), suggesting stronger performance on open-ended tasks. Claude Opus 4.7 excels at step-change improvement in agentic coding over opus 4.6. o3 is known for top-tier reasoning on math, science, and agentic tasks.
Which should you choose: Claude Opus 4.7 or o3?
- → Step-change improvement in agentic coding over Opus 4.6
- → 1M token context window at standard pricing
- → 128K max output tokens
- → Top-tier reasoning on math, science, and agentic tasks
- → 87% cheaper than original o1 at the same capability tier
- → 200K context window
Frequently Asked Questions
Which is cheaper: Claude Opus 4.7 or o3?
o3 is cheaper at $2.00/1M per 1M input tokens, making it 2.5x more affordable.
Which has better quality: Claude Opus 4.7 or o3?
Claude Opus 4.7 scores higher on the LMSYS Chatbot Arena with an ELO of 1415, suggesting better overall quality for most tasks.
Which has a larger context window: Claude Opus 4.7 or o3?
Claude Opus 4.7 has a larger context window at 1000K tokens.
Should I choose Claude Opus 4.7 or o3?
Choose o3 if cost is the priority. Choose Claude Opus 4.7 if benchmark quality is most important. Consider your specific use case: Claude Opus 4.7 is best for coding and reasoning, while o3 excels at reasoning and math.
Is Claude Opus 4.7 or o3 open source?
Claude Opus 4.7 is proprietary. o3 is proprietary.