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Multimodal AI models GPT-4o, Claude, and Gemini have different image payload requirements

By PulseAugur Editorial · [1 sources] ·

Developers are encountering subtle issues when sending image data to multimodal AI models like OpenAI's GPT-4o, Anthropic's Claude, and Google's Gemini. While all three models fundamentally accept Base64-encoded images within a JSON payload, they each require a different structure for this data. OpenAI's GPT-4o expects a full data URL including the prefix, whereas Claude and Gemini require raw Base64 data with the MIME type specified separately. These discrepancies can lead to common "invalid image" errors for users. AI

IMPACT Developers must carefully format image payloads for each multimodal AI model to avoid processing errors.

RANK_REASON Article details specific technical implementation differences for using multimodal AI models.

Read on dev.to — LLM tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Multimodal AI models GPT-4o, Claude, and Gemini have different image payload requirements

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Article details specific technical implementation differences for using multimodal AI models.
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COVERAGE [1]

  1. dev.to — LLM tag TIER_1 English(EN) · Peter Anderson ·

    Sending Images to GPT-4o, Claude, and Gemini: The Base64 Payload Each One Wants

    <p>You want to send a screenshot to a vision model. All three of the big ones — OpenAI's GPT-4o, Anthropic's Claude, Google's Gemini — accept images the same fundamental way: <strong>Base64-encode the bytes and put them in the JSON request.</strong> No file uploads, no multipart,…

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