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Claude 3.5 Sonnet vs o3
Comprehensive side-by-side LLM comparison
o3 leads with 17.5% higher average benchmark score. Claude 3.5 Sonnet offers 100.0K more tokens in context window than o3. o3 is $8.00 cheaper per million tokens. Claude 3.5 Sonnet is available on 3 providers. Overall, o3 is the stronger choice for coding tasks.
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Anthropic
This upgraded version of Claude 3.5 Sonnet was released with significant improvements in coding and agentic tool use. Built to deliver enhanced performance in software engineering tasks, it brought substantial gains in reasoning and problem-solving while introducing the groundbreaking computer use capability in public beta, allowing it to interact with computer interfaces like a human.
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OpenAI
o3 represents the next generation in OpenAI's reasoning model series, developed to advance the capabilities of deliberate, step-by-step problem solving. Built to handle increasingly complex challenges across mathematics, science, and coding, it continues the evolution of reasoning-focused AI with improved analytical depth and accuracy.
5 months newer
Claude 3.5 Sonnet
Anthropic
2024-10-22
o3
OpenAI
2025-04-16
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Pricing Comparison
Cost per million tokens (USD)
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Claude 3.5 Sonnet
Input:$3.00
Output:$15.00
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o3
Input:$2.00
Output:$8.00($8.00 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 4 common benchmarks
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Claude 3.5 Sonnet
Average Score:63.1%
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o3
Average Score:80.5%(+17.5%)
Performance comparison across key benchmark categories
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Claude 3.5 Sonnet
Coding49.0%
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o3
Coding69.1%(+20.1%)
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Knowledge Cutoff
Training data recency comparison
o3
2024-05-31
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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Claude 3.5 Sonnet
3 providers
Anthropic
Throughput: 100 tok/s
Latency: 0.5ms
Bedrock
Throughput: 101 tok/s
Latency: 0.5ms
Throughput: 42 tok/s
Latency: 0.4ms
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Claude 3.5 Sonnet
Avg Score:63.1%
Providers:3
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o3
Avg Score:80.5%(+17.5%)
Providers:1