GPT-4o vs Claude 3.5 Sonnet
GPT-4o and Claude 3.5 Sonnet are the two most widely used frontier LLMs in 2026. GPT-4o leads in multimodal capabilities and ecosystem breadth, while Claude 3.5 Sonnet dominates in coding, long-context analysis, and nuanced reasoning tasks.
Specifications
Side-by-Side Specs
Detailed technical comparison of GPT-4o and Claude 3.5 Sonnet.
GPT-4o
OpenAI
Claude 3.5 Sonnet
Anthropic
Provider
OpenAI
Anthropic
Context Window
128K
200K
Parameters
~1.7T (est.)
Undisclosed
License
Proprietary
Proprietary
Price
$5 / 1M tok
$3 / 1M tok
MMLU Score
88.7
88.3
HumanEval
90.2
92.0
MATH
76.6
71.1
Multilingual
95+ languages
90+ languages
Release Date
May 2024
Jun 2024
Strengths
Key Strengths
What each model does best.
GPT-4o
OpenAI
- Real-time multimodal (vision, audio, text)
- Largest ecosystem of integrations
- Best for general-purpose chat and reasoning
- Strong tool-use and function calling
Claude 3.5 Sonnet
Anthropic
- Best-in-class coding and code analysis
- Artifacts UI for interactive outputs
- Superior long-context comprehension
- Stronger safety and alignment
Best Use Cases
When to Choose Which
Practical recommendations based on real-world workloads.
Choose GPT-4o for
- → Real-time voice assistants
- → Multimodal applications (vision + audio)
- → Chatbots with broad integrations
- → General-purpose reasoning tasks
Choose Claude 3.5 Sonnet for
- → Code generation and debugging
- → Document analysis and summarization
- → Legal and compliance review
- → Creative writing with artifacts
Final Verdict
Our Recommendation
Choose GPT-4o for multimodal applications and broad ecosystem integration. Choose Claude 3.5 Sonnet for coding, document-heavy workflows, and tasks requiring deep analytical reasoning.
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