Capability · 2026-08-13
AI Models with Structured Output Support
AI models that support JSON mode / structured output for reliable data extraction.
What is this?
- Structured output (sometimes called JSON mode or response_format=json_schema) constrains the model to emit a JSON document that matches a schema you provide.
- Unlike a plain prompt that says "reply in JSON", structured output is enforced at decode time — the model literally cannot emit invalid JSON.
Why it matters
- It eliminates JSON parsing errors and jailbreak prefixes like "Sure! Here's the JSON: ...".
- It is essential for any pipeline that pipes LLM output into a typed system: data extraction, classification, structured summarisation.
506 models with this capability
Showing top 60 of 506. Use the full directory to filter further.
Frequently asked questions
How many AI models support structured output?
506 canonical models in our database currently support structured output. The list is regenerated on every data refresh, so it always reflects the latest releases tracked in our catalogue.
What is the cheapest model with structured output?
Voxtral Small 24B 2507 from Mistral is currently the lowest-priced option, at $0.002 per 1M input tokens and $0.002 per 1M output tokens. The full table above is sorted price-ascending.
Which model with structured output has the largest context window?
Pokee-Isaac 28B (nano-gpt) leads on context at 10M tokens. This may matter if you also need long-document understanding alongside structured output.
Which models are available on the most providers?
Production-readiness usually correlates with how many independent providers host the same weights. The top three by provider count are: GLM-5.2 (74), Kimi K2.6 (62), DeepSeek V4 Pro (55).
How is structured output different from a regular LLM?
Structured output (a.k.a. JSON mode / response_format=json_schema) constrains the model at decode time so it cannot emit invalid JSON. This is stricter than just prompting 'reply in JSON' and removes a whole class of parsing errors.
How often is this list updated?
Daily. Our data pipeline syncs once a day, regenerates the canonical model list, and rebuilds these pages so newly released models appear within 24 hours.
Explore more
Top models with this capability
- Voxtral Small 24B 2507$0.00 in / $0.00 out
- Llama 3.2 3B Instruct$0.02 in / $0.02 out
- Ling-2.6-flash$0.01 in / $0.03 out
- Llama 3.1 8B Instruct$0.02 in / $0.03 out
- Mistral Nemo Instruct 2407$0.02 in / $0.03 out
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Pricing comparisons
Vendors in this list
Last updated:
Prices in USD per 1M tokens. Unknown means the provider does not publish per-token pricing.
Pricing and capabilities are refreshed daily and reconciled against each provider's official documentation. Always verify critical production decisions with the provider directly.