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GPT-4o vs Claude 3.5 Sonnet: Complete Comparison
OpenAI’s default multimodal workhorse versus Anthropic’s steerable Sonnet: compare latency expectations, vision + tool calling, and how each lands in Azure/OpenAI versus Bedrock/Anthropic APIs for production assistants.
Featured · Updated 3 weeks ago · Last verified: May 2026 · Score 5
Choose GPT-4o when
Strong via Azure OpenAI, private networking; OpenAI data policies per tier.
Choose Claude 3.5 Sonnet when
Bedrock + direct Anthropic API; org policy and residency options vary by cloud.
Overview
This compares OpenAI’s multimodal GPT-4o with Anthropic’s Claude 3.5 Sonnet—two default choices for production chat, tools, and vision. The best pick depends on cloud estate (Azure vs AWS Bedrock), context length needs, and how much you optimize for tool throughput versus long-document reasoning.
Recommendation
Azure-first teams often default to GPT-4o; AWS Bedrock–first teams frequently pilot Sonnet. If neither cloud constraint applies, pick the API where your eval harness is already wired, then optimize cost and latency with caching and smaller models for subtasks.
Limitations and trade-offs
Pricing, rate limits, and regional SKUs change often. Safety defaults and system-prompt behavior differ—mirror production settings in evals. Multimodal and audio features vary by API surface and region.