Provider comparisons

Vendor-specific schema drift, documented page by page.

These pages target the exact compatibility failures teams hit when they try to reuse one JSON Schema across multiple model providers and SDK layers.

OpenAI

OpenAI Structured Outputs Schema Limits and Fixes

Learn why OpenAI strict structured outputs break on optional properties, missing required fields, and permissive objects, and how Schema Gateway rewrites schemas for production use.

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Gemini

Gemini Structured Output Schema Subset and propertyOrdering

Gemini structured outputs support only a subset of JSON Schema and Gemini 2.0 needs explicit propertyOrdering. Schema Gateway surfaces the gaps and rewrites the schema variant.

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Anthropic

Anthropic OpenAI Compatibility and strict Schema Drift

Anthropic's OpenAI compatibility layer is useful for testing, but their docs say the strict function-calling parameter is ignored. Schema Gateway catches the mismatch before teams assume conformance.

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Ollama

Ollama Structured Outputs and Local Model Reliability

Ollama supports structured outputs with JSON schema, but local pipelines still benefit from repair, validation, and provider-portable schema checks. Schema Gateway adds that reliability layer.

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