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GPT-4o vs Claude 3.5 Sonnet

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.

Verdict

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/A…

GPT-4o

Choose GPT-4o if…

  • Tool / JSON: Mature function calling, JSON mode, parallel tools; Azure OpenAI parity for many regions.
  • Context window: ~128k tokens on API (check current model card); good for long docs with chunking.

Best for

Tool / JSON: Mature function calling, JSON mode, parallel toolsContext window: ~128k tokens on API (check current model card)

Claude 3.5 Sonnet

Choose Claude 3.5 Sonnet if…

  • Tool / JSON: Solid tool use; JSON adherence strong; AWS Bedrock path for many enterprises.
  • Context window: 200k-token class context (per provider docs); strong needle-in-haystack workloads.

Best for

Tool / JSON: Solid tool useContext window: 200k

Matrix

Each cell is intentionally concise — jump to source docs for depth.

ItemInteractive latencyContext windowVision inputsTool / JSONEnterprise paths
GPT-4oLow–mid; strong at fast tool-heavy loops; tuned for ChatGPT-scale traffic.~128k tokens on API (check current model card); good for long docs with chunking.Native image inputs; common choice for multimodal product flows.Mature function calling, JSON mode, parallel tools; Azure OpenAI parity for many regions.Strong via Azure OpenAI, private networking; OpenAI data policies per tier.
Claude 3.5 SonnetLow–mid; strong for long-context reasoning and careful instruction following.200k-token class context (per provider docs); strong needle-in-haystack workloads.Image inputs supported; often chosen for analysis + document workflows.Solid tool use; JSON adherence strong; AWS Bedrock path for many enterprises.Bedrock + direct Anthropic API; org policy and residency options vary by cloud.